diff --git a/crackcode/client/package-lock.json b/crackcode/client/package-lock.json
index ec5fcc16..6a72ee6a 100644
--- a/crackcode/client/package-lock.json
+++ b/crackcode/client/package-lock.json
@@ -21,6 +21,9 @@
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@@ -266,6 +339,16 @@
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@@ -314,6 +397,161 @@
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@@ -887,6 +1125,24 @@
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@@ -1339,6 +1595,13 @@
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+        "tinyglobby": "^0.2.15",
+        "tinyrainbow": "^3.0.3",
+        "vite": "^6.0.0 || ^7.0.0 || ^8.0.0-0",
+        "why-is-node-running": "^2.3.0"
+      },
+      "bin": {
+        "vitest": "vitest.mjs"
+      },
+      "engines": {
+        "node": "^20.0.0 || ^22.0.0 || >=24.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      },
+      "peerDependencies": {
+        "@edge-runtime/vm": "*",
+        "@opentelemetry/api": "^1.9.0",
+        "@types/node": "^20.0.0 || ^22.0.0 || >=24.0.0",
+        "@vitest/browser-playwright": "4.1.0",
+        "@vitest/browser-preview": "4.1.0",
+        "@vitest/browser-webdriverio": "4.1.0",
+        "@vitest/ui": "4.1.0",
+        "happy-dom": "*",
+        "jsdom": "*",
+        "vite": "^6.0.0 || ^7.0.0 || ^8.0.0-0"
+      },
+      "peerDependenciesMeta": {
+        "@edge-runtime/vm": {
+          "optional": true
+        },
+        "@opentelemetry/api": {
+          "optional": true
+        },
+        "@types/node": {
+          "optional": true
+        },
+        "@vitest/browser-playwright": {
+          "optional": true
+        },
+        "@vitest/browser-preview": {
+          "optional": true
+        },
+        "@vitest/browser-webdriverio": {
+          "optional": true
+        },
+        "@vitest/ui": {
+          "optional": true
+        },
+        "happy-dom": {
+          "optional": true
+        },
+        "jsdom": {
+          "optional": true
+        },
+        "vite": {
+          "optional": false
+        }
+      }
+    },
+    "node_modules/w3c-xmlserializer": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/w3c-xmlserializer/-/w3c-xmlserializer-5.0.0.tgz",
+      "integrity": "sha512-o8qghlI8NZHU1lLPrpi2+Uq7abh4GGPpYANlalzWxyWteJOCsr/P+oPBA49TOLu5FTZO4d3F9MnWJfiMo4BkmA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "xml-name-validator": "^5.0.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/webidl-conversions": {
+      "version": "8.0.1",
+      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-8.0.1.tgz",
+      "integrity": "sha512-BMhLD/Sw+GbJC21C/UgyaZX41nPt8bUTg+jWyDeg7e7YN4xOM05YPSIXceACnXVtqyEw/LMClUQMtMZ+PGGpqQ==",
+      "dev": true,
+      "license": "BSD-2-Clause",
+      "engines": {
+        "node": ">=20"
+      }
+    },
+    "node_modules/whatwg-mimetype": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/whatwg-mimetype/-/whatwg-mimetype-5.0.0.tgz",
+      "integrity": "sha512-sXcNcHOC51uPGF0P/D4NVtrkjSU2fNsm9iog4ZvZJsL3rjoDAzXZhkm2MWt1y+PUdggKAYVoMAIYcs78wJ51Cw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=20"
+      }
+    },
+    "node_modules/whatwg-url": {
+      "version": "16.0.1",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-16.0.1.tgz",
+      "integrity": "sha512-1to4zXBxmXHV3IiSSEInrreIlu02vUOvrhxJJH5vcxYTBDAx51cqZiKdyTxlecdKNSjj8EcxGBxNf6Vg+945gw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@exodus/bytes": "^1.11.0",
+        "tr46": "^6.0.0",
+        "webidl-conversions": "^8.0.1"
+      },
+      "engines": {
+        "node": "^20.19.0 || ^22.12.0 || >=24.0.0"
+      }
+    },
     "node_modules/which": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
@@ -3869,6 +4975,23 @@
         "node": ">= 8"
       }
     },
+    "node_modules/why-is-node-running": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/why-is-node-running/-/why-is-node-running-2.3.0.tgz",
+      "integrity": "sha512-hUrmaWBdVDcxvYqnyh09zunKzROWjbZTiNy8dBEjkS7ehEDQibXJ7XvlmtbwuTclUiIyN+CyXQD4Vmko8fNm8w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "siginfo": "^2.0.0",
+        "stackback": "0.0.2"
+      },
+      "bin": {
+        "why-is-node-running": "cli.js"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/word-wrap": {
       "version": "1.2.5",
       "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.5.tgz",
@@ -3879,6 +5002,23 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/xml-name-validator": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-5.0.0.tgz",
+      "integrity": "sha512-EvGK8EJ3DhaHfbRlETOWAS5pO9MZITeauHKJyb8wyajUfQUenkIg2MvLDTZ4T/TgIcm3HU0TFBgWWboAZ30UHg==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/xmlchars": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/xmlchars/-/xmlchars-2.2.0.tgz",
+      "integrity": "sha512-JZnDKK8B0RCDw84FNdDAIpZK+JuJw+s7Lz8nksI7SIuU3UXJJslUthsi+uWBUYOwPFwW7W7PRLRfUKpxjtjFCw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/yallist": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
diff --git a/crackcode/client/package.json b/crackcode/client/package.json
index a55580e8..ba35b57f 100644
--- a/crackcode/client/package.json
+++ b/crackcode/client/package.json
@@ -7,7 +7,8 @@
     "dev": "vite",
     "build": "vite build",
     "lint": "eslint .",
-    "preview": "vite preview"
+    "preview": "vite preview",
+    "test": "vitest"
   },
   "dependencies": {
     "@monaco-editor/react": "^4.7.0",
@@ -23,6 +24,9 @@
   },
   "devDependencies": {
     "@eslint/js": "^9.39.1",
+    "@testing-library/jest-dom": "^6.9.1",
+    "@testing-library/react": "^16.3.2",
+    "@testing-library/user-event": "^14.6.1",
     "@types/react": "^19.2.5",
     "@types/react-dom": "^19.2.3",
     "@vitejs/plugin-react": "^5.1.1",
@@ -30,6 +34,8 @@
     "eslint-plugin-react-hooks": "^7.0.1",
     "eslint-plugin-react-refresh": "^0.4.24",
     "globals": "^16.5.0",
-    "vite": "^7.2.4"
+    "jsdom": "^29.0.1",
+    "vite": "^7.2.4",
+    "vitest": "^4.1.0"
   }
 }
diff --git a/crackcode/client/setupTests.js b/crackcode/client/setupTests.js
new file mode 100644
index 00000000..7b7189a9
--- /dev/null
+++ b/crackcode/client/setupTests.js
@@ -0,0 +1,2 @@
+// setupTests.js
+import '@testing-library/jest-dom';
\ No newline at end of file
diff --git a/crackcode/client/src/components/store/StoreGrid.jsx b/crackcode/client/src/components/store/StoreGrid.jsx
index a43e0a13..7831fd14 100644
--- a/crackcode/client/src/components/store/StoreGrid.jsx
+++ b/crackcode/client/src/components/store/StoreGrid.jsx
@@ -1,32 +1,3 @@
-// import StoreItemCard from "./StoreItemCard";
-
-// export default function StoreGrid({
-//   items = [],
-//   onBuyXP,
-//   onBuyPaid,
-//   buyingItemId,
-// }) {
-//   if (!items.length) {
-//     return <p className="text-gray-400">No store items found.</p>;
-//   }
-
-//   return (
-//     <div className="grid gap-6 md:grid-cols-2 xl:grid-cols-4">
-//       {items.map((item) => (
-//         <StoreItemCard
-//           key={item._id || item.id}
-//           item={item}
-//           onBuyXP={onBuyXP}
-//           onBuyPaid={onBuyPaid}
-//           loading={buyingItemId === item._id}
-//         />
-//       ))}
-//     </div>
-//   );
-// }
-
-
-
 import StoreItemCard from "./StoreItemCard";
 
 export default function StoreGrid({
diff --git a/crackcode/client/src/components/store/StoreItemCard.jsx b/crackcode/client/src/components/store/StoreItemCard.jsx
index 6b073541..0a6735c8 100644
--- a/crackcode/client/src/components/store/StoreItemCard.jsx
+++ b/crackcode/client/src/components/store/StoreItemCard.jsx
@@ -1,142 +1,6 @@
-// import Card from "../ui/Card";
-// import Button from "../ui/Button";
-// import {CirclePoundSterling, CircleDollarSign} from "lucide-react";
-
-// export default function StoreItemCard({
-//   item,
-//   onBuyXP,
-//   onBuyPaid,
-//   loading = false,
-//   isInventoryView = false,
-//   onEquip,
-//   equippingItemId,
-//   equippedItemId,
-// }) {
-//   const API_BASE_URL = import.meta.env.VITE_API_URL || "http://localhost:5051";
-
-//   const rawImagePath = item.imageUrl || item.image || "";
-
-//   const normalizedImagePath = rawImagePath.startsWith("/upload/")
-//     ? rawImagePath.replace("/upload/", "/uploads/")
-//     : rawImagePath;
-
-//   const imageSrc = normalizedImagePath
-//     ? normalizedImagePath.startsWith("http")
-//       ? normalizedImagePath
-//       : `${API_BASE_URL}${normalizedImagePath}`
-//     : "/placeholder.png";
-
-//   const pricingType = item.pricing?.type;
-//   const amount = item.pricing?.amount ?? 0;
-//   const currency = item.pricing?.currency ?? "USD";
-
-//   const category = (item.category || item.type || "item").toLowerCase();
-
-//   const isEquipping = equippingItemId === item._id;
-//   const isEquipped = equippedItemId === item._id || item.isEquipped;
-
-//   let displayPrice = "N/A";
-//   let buttonLabel = "Buy";
-//   let buttonAction = () => {};
-//   let isDisabled = loading;
-
-//   if (!isInventoryView) {
-//     if (pricingType === "tokens") {
-
-//       displayPrice = (
-//         <div className="flex flex-row items-center gap-1.5 text-green-400 font-semibold"> 
-//         {amount} <CirclePoundSterling/>
-//         </div> 
-//       );
-
-//       buttonLabel = loading ? "Buying..." : "Buy";
-//       buttonAction = () => onBuyXP?.(item._id);
-//     } else if (pricingType === "paid") {
-
-//       displayPrice = (
-//         <div className="flex flex-row items-center gap-1.5 text-green-400 font-semibold"> 
-//         <CircleDollarSign/> {amount}
-//         </div>
-//       );
-
-//       buttonLabel = loading ? "Redirecting..." : "Buy with Card";
-//       buttonAction = () => onBuyPaid?.(item._id);
-//     } else if (pricingType === "free") {
-//       displayPrice = "Free";
-//       buttonLabel = loading ? "Claiming..." : "Claim";
-//       buttonAction = () => onBuyXP?.(item._id);
-//     }
-//   } else {
-//     displayPrice = "";
-
-//     if (isEquipped) {
-//       if (category === "theme") {
-//         buttonLabel = "Theme Applied";
-//       } else if (category === "title") {
-//         buttonLabel = "Title Equipped";
-//       } else {
-//         buttonLabel = "Avatar Equipped";
-//       }
-//       isDisabled = true;
-//       buttonAction = () => {};
-//     } else {
-//       if (category === "theme") {
-//         buttonLabel = isEquipping ? "Applying..." : "Apply Theme";
-//       } else if (category === "title") {
-//         buttonLabel = isEquipping ? "Equipping..." : "Equip Title";
-//       } else {
-//         buttonLabel = isEquipping ? "Equipping..." : "Equip Avatar";
-//       }
-//       isDisabled = isEquipping;
-//       buttonAction = () => onEquip?.(item);
-//     }
-//   }
-
-//   return (
-//     <Card variant="flat" padding="none" shadow="md" className="overflow-hidden">
-//       <div className="bg-[#2a2a2a] h-40 flex items-center justify-center rounded-t-lg">
-//         <img
-//           src={imageSrc}
-//           alt={item.name}
-//           className="h-24 object-contain"
-//           onError={(e) => {
-//             e.currentTarget.onerror = null;
-//             e.currentTarget.src = "/placeholder.png";
-//           }}
-//         />
-//       </div>
-
-//       <div className="p-4">
-//         <p className="text-xs text-gray-400 uppercase">
-//           {item.category || item.type || "item"}
-//         </p>
-
-//         <h3 className="text-lg font-semibold text-white">
-//           {item.name}
-//         </h3>
-
-//         <div className="text-green-500 text-sm mt-2">★★★★☆</div>
-
-//         <div className="flex justify-between items-center mt-4">
-//           {!isInventoryView ? (
-//             <span className="text-green-400 font-semibold">{displayPrice}</span>
-//           ) : (
-//             <span className="text-sm text-gray-400">Owned</span>
-//           )}
-
-//           <Button onClick={buttonAction} disabled={isDisabled} size="sm">
-//             {buttonLabel}
-//           </Button>
-//         </div>
-//       </div>
-//     </Card>
-//   );
-// }
-
 import Card from "../ui/Card";
 import Button from "../ui/Button";
 import { CirclePoundSterling, CircleDollarSign } from "lucide-react";
-import { useTheme } from "../../context/theme/ThemeContext";
 
 export default function StoreItemCard({
   item,
@@ -148,8 +12,6 @@ export default function StoreItemCard({
   equippingItemId,
   equippedItemId,
 }) {
-  const { theme } = useTheme();
-
   const API_BASE_URL = import.meta.env.VITE_BACKEND_URL || import.meta.env.VITE_API_URL || "http://localhost:5051";
 
   const rawImagePath = item.imageUrl || item.image || "";
@@ -161,16 +23,12 @@ export default function StoreItemCard({
     if (/^https?:\/\//i.test(p)) {
       imageSrc = p;
     } else if (p.startsWith("/upload/")) {
-      // legacy path: /upload/... -> normalize to /uploads/ and serve from API
       imageSrc = `${API_BASE_URL}${p.replace("/upload/", "/uploads/")}`;
     } else if (p.startsWith("/uploads") || p.includes("/uploads/")) {
-      // server-hosted uploads
       imageSrc = `${API_BASE_URL}${p.startsWith("/") ? p : `/${p}`}`;
     } else if (p.startsWith("/")) {
-      // client public path (Vite will serve this)
       imageSrc = p;
     } else {
-      // relative path from seeds or asset references -> use filename from path
       const parts = p.split(/[\\/]/);
       const filename = parts[parts.length - 1] || p;
       imageSrc = `/shop/${filename}`;
@@ -184,85 +42,32 @@ export default function StoreItemCard({
   const isEquipping = equippingItemId === item._id;
   const isEquipped = equippedItemId === item._id || item.isEquipped;
 
-  const isLightFamily = ["light", "cream", "country"].includes(theme);
-
-  const cardClass =
-    theme === "light"
-      ? "border-gray-200 bg-gray-100 shadow-md hover:shadow-lg"
-      : theme === "cream"
-        ? "border-[#ddd2c1] bg-[#f3ede3] shadow-md hover:shadow-lg"
-        : theme === "country"
-          ? "border-[#cfbea6] bg-[#efe4d3] shadow-md hover:shadow-lg"
-          : theme === "midnight"
-            ? "border-[#22314f] bg-[#12203c] shadow-md hover:shadow-xl"
-            : "border-gray-800 bg-[#161616] shadow-md hover:shadow-xl";
-
-  const imageAreaClass =
-    theme === "light"
-      ? "bg-gray-50"
-      : theme === "cream"
-        ? "bg-[#faf6ef]"
-        : theme === "country"
-          ? "bg-[#f7efe2]"
-          : theme === "midnight"
-            ? "bg-[#0d1a33]"
-            : "bg-[#222222]";
-
-  const contentAreaClass =
-    theme === "light"
-      ? "bg-gray-100"
-      : theme === "cream"
-        ? "bg-[#f3ede3]"
-        : theme === "country"
-          ? "bg-[#efe4d3]"
-          : theme === "midnight"
-            ? "bg-[#0f1b35]"
-            : "bg-[#0f0f0f]";
-
-  const titleClass = isLightFamily ? "text-gray-900" : "text-white";
-  const metaClass =
-    theme === "midnight"
-      ? "text-gray-300"
-      : isLightFamily
-        ? "text-gray-500"
-        : "text-gray-400";
-  const ownedClass =
-    theme === "midnight"
-      ? "text-gray-300"
-      : isLightFamily
-        ? "text-gray-500"
-        : "text-gray-400";
-  const ratingClass = "text-green-500";
-  const priceClass = isLightFamily ? "text-green-600" : "text-green-400";
-
   let displayPrice = "N/A";
   let buttonLabel = "Buy";
-  let buttonAction = () => { };
+  let buttonAction = () => {};
   let isDisabled = loading;
 
   if (!isInventoryView) {
     if (pricingType === "tokens") {
       displayPrice = (
-        <div className={`flex items-center gap-1.5 font-semibold ${priceClass}`}>
+        <div className="flex items-center gap-1.5 font-semibold" style={{ color: 'var(--brand)' }}>
           <span>{amount}</span>
           <CirclePoundSterling className="h-4 w-4" />
         </div>
       );
-
       buttonLabel = loading ? "Buying..." : "Buy";
       buttonAction = () => onBuyXP?.(item._id);
     } else if (pricingType === "paid") {
       displayPrice = (
-        <div className={`flex items-center gap-1.5 font-semibold ${priceClass}`}>
+        <div className="flex items-center gap-1.5 font-semibold" style={{ color: 'var(--brand)' }}>
           <CircleDollarSign className="h-4 w-4" />
           <span>{amount}</span>
         </div>
       );
-
       buttonLabel = loading ? "Redirecting..." : "Buy with Card";
       buttonAction = () => onBuyPaid?.(item._id);
     } else if (pricingType === "free") {
-      displayPrice = <span className={`font-semibold ${priceClass}`}>Free</span>;
+      displayPrice = <span className="font-semibold" style={{ color: 'var(--brand)' }}>Free</span>;
       buttonLabel = loading ? "Claiming..." : "Claim";
       buttonAction = () => onBuyXP?.(item._id);
     }
@@ -278,7 +83,7 @@ export default function StoreItemCard({
         buttonLabel = "Avatar Equipped";
       }
       isDisabled = true;
-      buttonAction = () => { };
+      buttonAction = () => {};
     } else {
       if (category === "theme") {
         buttonLabel = isEquipping ? "Applying..." : "Apply Theme";
@@ -297,9 +102,13 @@ export default function StoreItemCard({
       variant="flat"
       padding="none"
       shadow="md"
-      className={`overflow-hidden rounded-2xl border transition hover:-translate-y-0.5 ${cardClass}`}
+      className="overflow-hidden rounded-2xl border transition hover:-translate-y-0.5"
+      style={{ background: 'var(--surface2)', borderColor: 'var(--border)' }}
     >
-      <div className={`flex h-44 items-center justify-center rounded-t-2xl ${imageAreaClass}`}>
+      <div
+        className="flex h-44 items-center justify-center rounded-t-2xl"
+        style={{ background: 'var(--surface)' }}
+      >
         <img
           src={imageSrc}
           alt={item.name}
@@ -311,22 +120,22 @@ export default function StoreItemCard({
         />
       </div>
 
-      <div className={`p-4 ${contentAreaClass}`}>
-        <p className={`text-xs uppercase tracking-wide ${metaClass}`}>
+      <div className="p-4" style={{ background: 'var(--surface2)' }}>
+        <p className="text-xs uppercase tracking-wide" style={{ color: 'var(--muted)' }}>
           {item.category || item.type || "item"}
         </p>
 
-        <h3 className={`mt-1 text-lg font-semibold ${titleClass}`}>
+        <h3 className="mt-1 text-lg font-semibold" style={{ color: 'var(--text)' }}>
           {item.name}
         </h3>
 
-        <div className={`mt-2 text-sm ${ratingClass}`}>★★★★☆</div>
+        <div className="mt-2 text-sm text-green-500">★★★★☆</div>
 
         <div className="mt-4 flex items-center justify-between gap-3">
           {!isInventoryView ? (
             <div>{displayPrice}</div>
           ) : (
-            <span className={`text-sm font-medium ${ownedClass}`}>Owned</span>
+            <span className="text-sm font-medium" style={{ color: 'var(--muted)' }}>Owned</span>
           )}
 
           <Button onClick={buttonAction} disabled={isDisabled} size="sm">
@@ -336,4 +145,4 @@ export default function StoreItemCard({
       </div>
     </Card>
   );
-}
\ No newline at end of file
+}
diff --git a/crackcode/client/src/components/store/StoreSidebar.jsx b/crackcode/client/src/components/store/StoreSidebar.jsx
index 226ce255..aa042e68 100644
--- a/crackcode/client/src/components/store/StoreSidebar.jsx
+++ b/crackcode/client/src/components/store/StoreSidebar.jsx
@@ -1,76 +1,20 @@
-// export default function StoreSidebar({ category, setCategory }) {
-//   const categories = [
-//     { label: "All", value: "all" },
-//     { label: "Avatars", value: "avatar" },
-//     { label: "Themes", value: "theme" },
-//     { label: "Titles", value: "title" },
-//     { label: "My Inventory", value: "inventory" },
-//   ];
-
-//   return (
-//     <div className="w-64 border-r border-gray-800 p-6">
-//       <h3 className="mb-6 text-gray-400">Categories</h3>
-
-//       <div className="flex flex-col gap-4">
-//         {categories.map((cat) => (
-//           <button
-//             key={cat.value}
-//             onClick={() => setCategory(cat.value)}
-//             className={`rounded-lg px-4 py-2 text-left transition ${
-//               category === cat.value
-//                 ? "bg-green-600 text-white"
-//                 : "text-gray-300 hover:bg-gray-800"
-//             }`}
-//           >
-//             {cat.label}
-//           </button>
-//         ))}
-//       </div>
-//     </div>
-//   );
-// }
-import { useTheme } from "../../context/theme/ThemeContext";
-
 export default function StoreSidebar({ category, setCategory }) {
-  const { theme } = useTheme();
-
   const categories = [
     { label: "All", value: "all" },
     { label: "Avatars", value: "avatar" },
     { label: "Themes", value: "theme" },
-    
     { label: "My Inventory", value: "inventory" },
   ];
 
-  const isLightFamily = ["light", "cream", "country"].includes(theme);
-
-  const sidebarClass =
-    theme === "light"
-      ? "bg-gray-100 border-gray-200"
-      : theme === "cream"
-      ? "bg-[#eee7db] border-[#ddd2c1]"
-      : theme === "country"
-      ? "bg-[#e7dccd] border-[#d4c4ad]"
-      : theme === "midnight"
-      ? "bg-[#0f1b35] border-[#1e2c4d]"
-      : "bg-[#111111] border-gray-800";
-
-  const headingClass = isLightFamily ? "text-gray-600" : "text-gray-400";
-
-  const idleButtonClass =
-    theme === "light"
-      ? "text-gray-700 hover:bg-gray-200"
-      : theme === "cream"
-      ? "text-gray-700 hover:bg-[#e6dccd]"
-      : theme === "country"
-      ? "text-gray-800 hover:bg-[#dccdb8]"
-      : theme === "midnight"
-      ? "text-gray-200 hover:bg-[#162544]"
-      : "text-gray-300 hover:bg-gray-800";
-
   return (
-    <div className={`w-64 border-r p-6 ${sidebarClass}`}>
-      <h3 className={`mb-6 text-sm font-semibold uppercase tracking-wide ${headingClass}`}>
+    <div
+      className="w-64 border-r p-6 sticky top-20 self-start min-h-[calc(100vh-5rem)]"
+      style={{ background: 'var(--surface)', borderColor: 'var(--border)' }}
+    >
+      <h3
+        className="mb-6 text-sm font-semibold uppercase tracking-wide"
+        style={{ color: 'var(--muted)' }}
+      >
         Categories
       </h3>
 
@@ -79,11 +23,22 @@ export default function StoreSidebar({ category, setCategory }) {
           <button
             key={cat.value}
             onClick={() => setCategory(cat.value)}
-            className={`rounded-lg px-4 py-2 text-left text-sm font-medium transition ${
+            className="rounded-lg px-4 py-2 text-left text-sm font-medium transition"
+            style={
               category === cat.value
-                ? "bg-green-600 text-white shadow-sm"
-                : idleButtonClass
-            }`}
+                ? { background: 'var(--brand)', color: 'var(--brandInk)' }
+                : { color: 'var(--textSec)', background: 'transparent' }
+            }
+            onMouseEnter={(e) => {
+              if (category !== cat.value) {
+                e.currentTarget.style.background = 'var(--surface2)';
+              }
+            }}
+            onMouseLeave={(e) => {
+              if (category !== cat.value) {
+                e.currentTarget.style.background = 'transparent';
+              }
+            }}
           >
             {cat.label}
           </button>
@@ -91,4 +46,4 @@ export default function StoreSidebar({ category, setCategory }) {
       </div>
     </div>
   );
-}
\ No newline at end of file
+}
diff --git a/crackcode/client/src/pages/shop/DetectiveStore.jsx b/crackcode/client/src/pages/shop/DetectiveStore.jsx
index 273c0d96..2bb8c156 100644
--- a/crackcode/client/src/pages/shop/DetectiveStore.jsx
+++ b/crackcode/client/src/pages/shop/DetectiveStore.jsx
@@ -1,695 +1,3 @@
-// import { useEffect, useMemo, useState } from "react";
-// import StoreGrid from "../../components/store/StoreGrid";
-// import StoreSidebar from "../../components/store/StoreSidebar";
-// import Toast from "../../components/common/Toast";
-// import HQBtn from "../../components/common/HQBtn";
-// import BackBtn from "../../components/common/BackBtn";
-
-// export default function DetectiveStore() {
-//   const [items, setItems] = useState([]);
-//   const [inventoryItems, setInventoryItems] = useState([]);
-//   const [ownedItemIds, setOwnedItemIds] = useState(new Set());
-//   const [category, setCategory] = useState("all");
-//   const [buyingItemId, setBuyingItemId] = useState(null);
-//   const [loading, setLoading] = useState(true);
-//   const [inventoryLoading, setInventoryLoading] = useState(false);
-//   const [equippingItemId, setEquippingItemId] = useState(null);
-//   const [equippedItemId, setEquippedItemId] = useState(null);
-
-//   const [username, setUsername] = useState("User");
-//   const [tokensRemaining, setTokensRemaining] = useState(0);
-//   const [profileImage, setProfileImage] = useState("/placeholder.png");
-
-//   const getToken = () => localStorage.getItem("accessToken");
-
-//   const [toast, setToast] = useState({
-//     show: false,
-//     message: "",
-//     type: "success",
-//   });
-
-//   const showToast = (message, type = "success") => {
-//     setToast({
-//       show: true,
-//       message,
-//       type,
-//     });
-//   };
-
-//   const normalizeImageUrl = (src) => {
-//     if (!src) return "/placeholder.png";
-//     if (src.startsWith("http")) return src;
-//     if (src.startsWith("/uploads")) return `http://localhost:5051${src}`;
-//     if (src.startsWith("/src")) return src;
-//     return src;
-//   };
-
-//   const loadProfile = async () => {
-//     try {
-//       const res = await fetch("http://localhost:5051/api/profile", {
-//         method: "GET",
-//         headers: {
-//           Authorization: `Bearer ${getToken()}`,
-//         },
-//       });
-
-//       const data = await res.json();
-//       console.log("PROFILE DATA:", data);
-
-//       const user =
-//         data?.user ||
-//         data?.profile ||
-//         data?.data?.user ||
-//         data?.data ||
-//         data;
-
-//       setUsername(user?.username || user?.name || "User");
-//       setTokensRemaining(user?.tokens ?? 0);
-
-//       const avatarSrc =
-//         user?.equippedAvatarItemId?.imageUrl ||
-//         user?.avatar ||
-//         "/placeholder.png";
-
-//       setProfileImage(normalizeImageUrl(avatarSrc));
-//     } catch (error) {
-//       console.error("Failed to load profile:", error);
-//       setUsername("User");
-//       setTokensRemaining(0);
-//       setProfileImage("/placeholder.png");
-//     }
-//   };
-
-//   const loadInventory = async () => {
-//     try {
-//       const res = await fetch("http://localhost:5051/api/shop/inventory", {
-//         method: "GET",
-//         headers: {
-//           Authorization: `Bearer ${getToken()}`,
-//         },
-//       });
-
-//       const data = await res.json();
-//       const inventory = Array.isArray(data) ? data : data.items || [];
-
-//       setInventoryItems(inventory);
-
-//       const ids = new Set(
-//         inventory.map((inv) => String(inv.itemId?._id || inv.itemId || inv._id))
-//       );
-
-//       setOwnedItemIds(ids);
-//     } catch (error) {
-//       console.error("Failed to load inventory:", error);
-//     }
-//   };
-
-//   useEffect(() => {
-//     const fetchItems = async () => {
-//       try {
-//         setLoading(true);
-
-//         const res = await fetch("http://localhost:5051/api/shop/items");
-//         const data = await res.json();
-
-//         setItems(Array.isArray(data) ? data : data.items || []);
-//       } catch (error) {
-//         console.error("Failed to fetch store items:", error);
-//         showToast("Failed to load store items", "error");
-//       } finally {
-//         setLoading(false);
-//       }
-//     };
-
-//     fetchItems();
-//     loadInventory();
-//     loadProfile();
-//   }, []);
-
-//   useEffect(() => {
-//     if (category === "inventory") {
-//       const fetchInventoryTab = async () => {
-//         try {
-//           setInventoryLoading(true);
-//           await loadInventory();
-//         } catch (error) {
-//           console.error("Failed to fetch inventory:", error);
-//           setInventoryItems([]);
-//           showToast("Failed to load inventory", "error");
-//         } finally {
-//           setInventoryLoading(false);
-//         }
-//       };
-
-//       fetchInventoryTab();
-//     }
-//   }, [category]);
-
-//   const handleBuyTokens = async (itemId) => {
-//     try {
-//       setBuyingItemId(itemId);
-
-//       const res = await fetch("http://localhost:5051/api/shop/purchase", {
-//         method: "POST",
-//         headers: {
-//           "Content-Type": "application/json",
-//           Authorization: `Bearer ${getToken()}`,
-//         },
-//         body: JSON.stringify({ itemId }),
-//       });
-
-//       const data = await res.json();
-
-//       if (data.success) {
-//         showToast("Successful! Item purchased", "success");
-//         await loadInventory();
-//         await loadProfile();
-//       } else {
-//         showToast(data.message || "Purchase failed", "error");
-//       }
-//     } catch (error) {
-//       console.error("Token purchase failed:", error);
-//       showToast("Purchase failed", "error");
-//     } finally {
-//       setBuyingItemId(null);
-//     }
-//   };
-
-//   const handleBuyPaid = async (itemId) => {
-//     try {
-//       setBuyingItemId(itemId);
-
-//       const res = await fetch("http://localhost:5051/api/shop/checkout", {
-//         method: "POST",
-//         headers: {
-//           "Content-Type": "application/json",
-//           Authorization: `Bearer ${getToken()}`,
-//         },
-//         body: JSON.stringify({ itemId }),
-//       });
-
-//       const data = await res.json();
-
-//       if (data?.url) {
-//         showToast("Redirecting to payment...", "success");
-//         window.location.href = data.url;
-//       } else {
-//         showToast(data.message || "Stripe checkout failed", "error");
-//       }
-//     } catch (error) {
-//       console.error("Stripe checkout failed:", error);
-//       showToast("Stripe checkout failed", "error");
-//     } finally {
-//       setBuyingItemId(null);
-//     }
-//   };
-
-//   const handleEquip = async (item) => {
-//     try {
-//       setEquippingItemId(item._id);
-
-//       const res = await fetch("http://localhost:5051/api/profile/equip-item", {
-//         method: "POST",
-//         headers: {
-//           "Content-Type": "application/json",
-//           Authorization: `Bearer ${getToken()}`,
-//         },
-//         body: JSON.stringify({
-//           itemId: item._id,
-//           category: item.category,
-//         }),
-//       });
-
-//       const data = await res.json();
-
-//       if (data.success) {
-//         setEquippedItemId(item._id);
-//         showToast("Item equipped successfully!", "success");
-//         await loadProfile();
-//       } else {
-//         showToast(data.message || "Failed to equip item", "error");
-//       }
-//     } catch (error) {
-//       console.error("Equip failed:", error);
-//       showToast("Failed to equip item", "error");
-//     } finally {
-//       setEquippingItemId(null);
-//     }
-//   };
-
-//   const displayedItems = useMemo(() => {
-//     if (category === "inventory") {
-//       return inventoryItems.map((inv) => inv.itemId || inv);
-//     }
-
-//     if (category === "all") {
-//       return items;
-//     }
-
-//     return items.filter(
-//       (item) => item.category?.toLowerCase() === category.toLowerCase()
-//     );
-//   }, [category, items, inventoryItems]);
-
-//   const sectionTitle =
-//     category === "inventory"
-//       ? "My Inventory"
-//       : category === "all"
-//       ? "All Items"
-//       : `${category.charAt(0).toUpperCase() + category.slice(1)} Items`;
-
-//   return (
-//     <div className="min-h-screen bg-black text-white">
-//       <Toast
-//         show={toast.show}
-//         message={toast.message}
-//         type={toast.type}
-//         onClose={() => setToast((prev) => ({ ...prev, show: false }))}
-//       />
-
-//       <div className="flex items-center justify-between px-10 py-6">
-//         <div className="flex items-center gap-4">
-//           <HQBtn />
-//           <BackBtn />
-//         </div>
-
-//         <div className="flex items-center gap-3 rounded-full border border-gray-700 bg-[#111] px-4 py-2">
-//           <img
-//             src={profileImage}
-//             alt={username}
-//             className="h-10 w-10 rounded-full object-cover border border-gray-600"
-//             onError={(e) => {
-//               e.currentTarget.src = "/placeholder.png";
-//             }}
-//           />
-
-//           <div className="leading-tight">
-//             <p className="text-sm font-semibold">{username}</p>
-//             <p className="text-xs font-medium text-green-400">
-//               {tokensRemaining} Tokens
-//             </p>
-//           </div>
-//         </div>
-//       </div>
-
-//       <div className="flex">
-//         <StoreSidebar category={category} setCategory={setCategory} />
-
-//         <div className="flex-1 p-10">
-//           <h1 className="mb-2 text-3xl font-bold">Detective Store</h1>
-//           <p className="mb-10 text-gray-400">
-//             Unlock exclusive avatars, themes, and titles to customize your
-//             detective profile
-//           </p>
-
-//           <h2 className="mb-6 text-2xl font-semibold">{sectionTitle}</h2>
-
-//           {loading && category !== "inventory" && (
-//             <p className="text-gray-400">Loading store items...</p>
-//           )}
-
-//           {inventoryLoading && category === "inventory" && (
-//             <p className="text-gray-400">Loading your inventory...</p>
-//           )}
-
-//           {!loading && !inventoryLoading && displayedItems.length === 0 && (
-//             <p className="text-gray-400">
-//               {category === "inventory"
-//                 ? "You do not own any items yet."
-//                 : "No items found in this category."}
-//             </p>
-//           )}
-
-//           {!loading && !inventoryLoading && displayedItems.length > 0 && (
-//             <StoreGrid
-//               items={displayedItems}
-//               onBuyXP={category === "inventory" ? undefined : handleBuyTokens}
-//               onBuyPaid={category === "inventory" ? undefined : handleBuyPaid}
-//               buyingItemId={buyingItemId}
-//               isInventoryView={category === "inventory"}
-//               onEquip={handleEquip}
-//               equippingItemId={equippingItemId}
-//               equippedItemId={equippedItemId}
-//               ownedItemIds={ownedItemIds}
-//             />
-//           )}
-//         </div>
-//       </div>
-//     </div>
-//   );
-// }
-
-// --------------------------------------------------------------------------------------------------
-
-// import { useEffect, useMemo, useState } from "react";
-// import StoreGrid from "../../components/store/StoreGrid";
-// import StoreSidebar from "../../components/store/StoreSidebar";
-// import Toast from "../../components/common/Toast";
-// import HQBtn from "../../components/common/HQBtn";
-// import BackBtn from "../../components/common/BackBtn";
-
-
-// export default function DetectiveStore() {
-//   const [items, setItems] = useState([]);
-//   const [inventoryItems, setInventoryItems] = useState([]);
-//   const [ownedItemIds, setOwnedItemIds] = useState(new Set());
-//   const [category, setCategory] = useState("all");
-//   const [buyingItemId, setBuyingItemId] = useState(null);
-//   const [loading, setLoading] = useState(true);
-//   const [inventoryLoading, setInventoryLoading] = useState(false);
-//   const [equippingItemId, setEquippingItemId] = useState(null);
-//   const [equippedItemId, setEquippedItemId] = useState(null);
-
-//   const [username, setUsername] = useState("User");
-//   const [tokensRemaining, setTokensRemaining] = useState(0);
-//   const [profileImage, setProfileImage] = useState("/placeholder.png");
-
-//   const getToken = () => localStorage.getItem("accessToken");
-
-//   const [toast, setToast] = useState({
-//     show: false,
-//     message: "",
-//     type: "success",
-//   });
-
-//   const showToast = (message, type = "success") => {
-//     setToast({
-//       show: true,
-//       message,
-//       type,
-//     });
-//   };
-
-//   const normalizeImageUrl = (src) => {
-//     if (!src) return "/placeholder.png";
-//     if (src.startsWith("http")) return src;
-//     if (src.startsWith("/uploads")) return `http://localhost:5051${src}`;
-//     if (src.startsWith("/src")) return src;
-//     return src;
-//   };
-
-//   const loadProfile = async () => {
-//     try {
-//       const res = await fetch("http://localhost:5051/api/profile", {
-//         method: "GET",
-//         headers: {
-//           Authorization: `Bearer ${getToken()}`,
-//         },
-//       });
-
-//       const data = await res.json();
-//       console.log("PROFILE DATA:", data);
-
-//       const user =
-//         data?.user ||
-//         data?.profile ||
-//         data?.data?.user ||
-//         data?.data ||
-//         data;
-
-//       setUsername(user?.username || user?.name || "User");
-//       setTokensRemaining(user?.tokens ?? 0);
-
-//       const avatarSrc =
-//         user?.equippedAvatarItemId?.imageUrl ||
-//         user?.avatar ||
-//         "/placeholder.png";
-
-//       setProfileImage(normalizeImageUrl(avatarSrc));
-//     } catch (error) {
-//       console.error("Failed to load profile:", error);
-//       setUsername("User");
-//       setTokensRemaining(0);
-//       setProfileImage("/placeholder.png");
-//     }
-//   };
-
-//   const loadInventory = async () => {
-//     try {
-//       const res = await fetch("http://localhost:5051/api/shop/inventory", {
-//         method: "GET",
-//         headers: {
-//           Authorization: `Bearer ${getToken()}`,
-//         },
-//       });
-
-//       const data = await res.json();
-//       const inventory = Array.isArray(data) ? data : data.items || [];
-
-//       setInventoryItems(inventory);
-
-//       const ids = new Set(
-//         inventory.map((inv) => String(inv.itemId?._id || inv.itemId || inv._id))
-//       );
-
-//       setOwnedItemIds(ids);
-//     } catch (error) {
-//       console.error("Failed to load inventory:", error);
-//     }
-//   };
-
-//   useEffect(() => {
-//     const fetchItems = async () => {
-//       try {
-//         setLoading(true);
-
-//         const res = await fetch("http://localhost:5051/api/shop/items");
-//         const data = await res.json();
-
-//         setItems(Array.isArray(data) ? data : data.items || []);
-//       } catch (error) {
-//         console.error("Failed to fetch store items:", error);
-//         showToast("Failed to load store items", "error");
-//       } finally {
-//         setLoading(false);
-//       }
-//     };
-
-//     fetchItems();
-//     loadInventory();
-//     loadProfile();
-//   }, []);
-
-//   useEffect(() => {
-//     if (category === "inventory") {
-//       const fetchInventoryTab = async () => {
-//         try {
-//           setInventoryLoading(true);
-//           await loadInventory();
-//         } catch (error) {
-//           console.error("Failed to fetch inventory:", error);
-//           setInventoryItems([]);
-//           showToast("Failed to load inventory", "error");
-//         } finally {
-//           setInventoryLoading(false);
-//         }
-//       };
-
-//       fetchInventoryTab();
-//     }
-//   }, [category]);
-
-//   const handleBuyTokens = async (itemId) => {
-//     try {
-//       setBuyingItemId(itemId);
-
-//       const res = await fetch("http://localhost:5051/api/shop/purchase", {
-//         method: "POST",
-//         headers: {
-//           "Content-Type": "application/json",
-//           Authorization: `Bearer ${getToken()}`,
-//         },
-//         body: JSON.stringify({ itemId }),
-//       });
-
-//       const data = await res.json();
-
-//       if (data.success) {
-//         showToast("Successful! Item purchased", "success");
-//         await loadInventory();
-//         await loadProfile();
-//       } else {
-//         showToast(data.message || "Purchase failed", "error");
-//       }
-//     } catch (error) {
-//       console.error("Token purchase failed:", error);
-//       showToast("Purchase failed", "error");
-//     } finally {
-//       setBuyingItemId(null);
-//     }
-//   };
-
-//   const handleBuyPaid = async (itemId) => {
-//     try {
-//       setBuyingItemId(itemId);
-
-//       const res = await fetch("http://localhost:5051/api/shop/checkout", {
-//         method: "POST",
-//         headers: {
-//           "Content-Type": "application/json",
-//           Authorization: `Bearer ${getToken()}`,
-//         },
-//         body: JSON.stringify({ itemId }),
-//       });
-
-//       const data = await res.json();
-
-//       if (data?.url) {
-//         showToast("Redirecting to payment...", "success");
-//         window.location.href = data.url;
-//       } else {
-//         showToast(data.message || "Stripe checkout failed", "error");
-//       }
-//     } catch (error) {
-//       console.error("Stripe checkout failed:", error);
-//       showToast("Stripe checkout failed", "error");
-//     } finally {
-//       setBuyingItemId(null);
-//     }
-//   };
-
-//   const handleEquip = async (item) => {
-//     try {
-//       setEquippingItemId(item._id);
-
-//       const res = await fetch("http://localhost:5051/api/profile/equip-item", {
-//         method: "POST",
-//         headers: {
-//           "Content-Type": "application/json",
-//           Authorization: `Bearer ${getToken()}`,
-//         },
-//         body: JSON.stringify({
-//           itemId: item._id,
-//           category: item.category,
-//         }),
-//       });
-
-//       const data = await res.json();
-
-//       if (data.success) {
-//         setEquippedItemId(item._id);
-//         showToast("Item equipped successfully!", "success");
-//         await loadProfile();
-//       } else {
-//         showToast(data.message || "Failed to equip item", "error");
-//       }
-//     } catch (error) {
-//       console.error("Equip failed:", error);
-//       showToast("Failed to equip item", "error");
-//     } finally {
-//       setEquippingItemId(null);
-//     }
-//   };
-
-//   const displayedItems = useMemo(() => {
-//     if (category === "inventory") {
-//       return inventoryItems.map((inv) => inv.itemId || inv);
-//     }
-
-//     if (category === "all") {
-//       return items;
-//     }
-
-//     return items.filter(
-//       (item) => item.category?.toLowerCase() === category.toLowerCase()
-//     );
-//   }, [category, items, inventoryItems]);
-
-//   const sectionTitle =
-//     category === "inventory"
-//       ? "My Inventory"
-//       : category === "all"
-//       ? "All Items"
-//       : `${category.charAt(0).toUpperCase() + category.slice(1)} Items`;
-
-//   return (
-    
-//       <div className="min-h-screen bg-gray-50 text-gray-900">
-//       <Toast
-//         show={toast.show}
-//         message={toast.message}
-//         type={toast.type}
-//         onClose={() => setToast((prev) => ({ ...prev, show: false }))}
-//       />
-
-//       <div className="flex items-center justify-between px-10 py-6">
-//         <div className="flex items-center gap-4">
-//           <HQBtn />
-//           <BackBtn />
-//         </div>
-
-//         <div className="flex items-center gap-3 rounded-full border border-gray-200 bg-white px-4 py-2 shadow-sm">
-//           <img
-//             src={profileImage}
-//             alt={username}
-//             className="h-10 w-10 rounded-full object-cover border border-gray-300"
-//             onError={(e) => {
-//               e.currentTarget.src = "/placeholder.png";
-//             }}
-//           />
-
-//           <div className="leading-tight">
-//             <p className="text-sm font-semibold text-gray-900">{username}</p>
-//             <p className="text-xs font-medium text-green-600">
-//               {tokensRemaining} Tokens
-//             </p>
-//           </div>
-//         </div>
-//       </div>
-
-//       <div className="flex">
-//         <StoreSidebar category={category} setCategory={setCategory} />
-
-//         <div className="flex-1 p-10">
-//           <h1 className="mb-2 text-3xl font-bold text-gray-900">
-//             Detective Store
-//           </h1>
-//           <p className="mb-10 text-gray-500">
-//             Unlock exclusive avatars, themes, and titles to customize your
-//             detective profile
-//           </p>
-
-//           <h2 className="mb-6 text-2xl font-semibold text-gray-900">
-//             {sectionTitle}
-//           </h2>
-
-//           {loading && category !== "inventory" && (
-//             <p className="text-gray-500">Loading store items...</p>
-//           )}
-
-//           {inventoryLoading && category === "inventory" && (
-//             <p className="text-gray-500">Loading your inventory...</p>
-//           )}
-
-//           {!loading && !inventoryLoading && displayedItems.length === 0 && (
-//             <p className="text-gray-500">
-//               {category === "inventory"
-//                 ? "You do not own any items yet."
-//                 : "No items found in this category."}
-//             </p>
-//           )}
-
-//           {!loading && !inventoryLoading && displayedItems.length > 0 && (
-//             <StoreGrid
-//               items={displayedItems}
-//               onBuyXP={category === "inventory" ? undefined : handleBuyTokens}
-//               onBuyPaid={category === "inventory" ? undefined : handleBuyPaid}
-//               buyingItemId={buyingItemId}
-//               isInventoryView={category === "inventory"}
-//               onEquip={handleEquip}
-//               equippingItemId={equippingItemId}
-//               equippedItemId={equippedItemId}
-//               ownedItemIds={ownedItemIds}
-//             />
-//           )}
-//         </div>
-//       </div>
-//     </div>
-//   );
-// }
-
-
-//--------------------------------------------------------------------------------------------------
 import { useEffect, useMemo, useRef, useState } from "react";
 import { useLocation, useNavigate } from "react-router-dom";
 import StoreGrid from "../../components/store/StoreGrid";
@@ -720,22 +28,6 @@ export default function DetectiveStore() {
 
   const API_BASE_URL = import.meta.env.VITE_BACKEND_URL || import.meta.env.VITE_API_URL || "http://localhost:5051";
 
-  const isLightFamily = ["light", "cream", "country"].includes(theme);
-
-  const pageClass =
-    theme === "light"
-      ? "bg-gray-50 text-gray-900"
-      : theme === "cream"
-      ? "bg-[#f6f1e7] text-gray-900"
-      : theme === "country"
-      ? "bg-[#efe7dc] text-gray-900"
-      : theme === "midnight"
-      ? "bg-[#08142b] text-white"
-      : "bg-black text-white";
-
-  const titleClass = isLightFamily ? "text-gray-900" : "text-white";
-  const subTextClass = isLightFamily ? "text-gray-500" : "text-gray-400";
-  const tokenClass = isLightFamily ? "text-green-600" : "text-green-400";
 
   const getToken = () => localStorage.getItem("accessToken");
 
@@ -790,6 +82,15 @@ export default function DetectiveStore() {
         "/placeholder.png";
 
       setProfileImage(normalizeImageUrl(avatarSrc));
+
+      const equippedId =
+        user?.equippedAvatarItemId?._id ||
+        user?.equippedThemeItemId?._id ||
+        user?.equippedTitleItemId?._id ||
+        null;
+      if (equippedId) {
+        setEquippedItemId(String(equippedId));
+      }
     } catch (error) {
       console.error("Failed to load profile:", error);
       setUsername("User");
@@ -1101,23 +402,21 @@ export default function DetectiveStore() {
       : `${category.charAt(0).toUpperCase() + category.slice(1)} Items`;
 
   return (
-    <div className={`min-h-screen flex flex-col ${pageClass}`}>
-      <div className="flex items-center justify-between px-4 py-4">
-        <Header variant="empty" showBackBtn={false} />
-      </div>
+    <div className="min-h-screen flex flex-col" style={{ background: 'var(--bg)', color: 'var(--text)' }}>
+      <Header variant="empty" showBackBtn={false} />
 
-      <div className="flex flex-1">
+      <div className="flex flex-1 pt-20">
   <StoreSidebar category={category} setCategory={setCategory} />
 
   <div className="flex-1 p-10">
 
     {/* Heading row with avatar on the right */}
     <div className="flex items-center justify-between">
-      <h1 className={`text-4xl md:text-5xl font-bold text-[var(--muted)] ${titleClass}`}>
+      <h1 className="text-4xl md:text-5xl font-bold" style={{ color: 'var(--text)' }}>
         Detective Store
       </h1>
       <div className="flex flex-col items-center gap-1">
-        <div className={`w-14 h-14 rounded-full overflow-hidden border-2 mt-5 ${isLightFamily ? "border-green-300" : "border-green-700"} shadow-md`}>
+        <div className="w-14 h-14 rounded-full overflow-hidden border-2 mt-5 shadow-md" style={{ borderColor: 'var(--brand)' }}>
           <img
             src={profileImage}
             alt={username}
@@ -1125,31 +424,31 @@ export default function DetectiveStore() {
             onError={(e) => { e.currentTarget.src = "/placeholder.png"; }}
           />
         </div>
-        <span className={`text-sm font-semibold px-3 py-1 rounded-full border ${tokenClass} ${isLightFamily ? "border-green-300 bg-green-50" : "border-green-800 bg-green-950/40"}`}>
+        <span className="text-sm font-semibold px-3 py-1 rounded-full border" style={{ color: 'var(--brand)', borderColor: 'var(--brand)', background: 'var(--brandSoft)' }}>
           {tokensRemaining} Tokens
         </span>
       </div>
     </div>
 
-          <p className={`mb-10 text-lg ${subTextClass}`}>
+          <p className="mb-10 text-lg" style={{ color: 'var(--textSec)' }}>
             Unlock exclusive avatars, themes, and titles to customize your
             detective profile
           </p>
 
-          <h2 className={`mb-6 text-2xl font-semibold ${titleClass}`}>
+          <h2 className="mb-6 text-2xl font-semibold" style={{ color: 'var(--text)' }}>
             {sectionTitle}
           </h2>
 
           {loading && category !== "inventory" && (
-            <p className={subTextClass}>Loading store items...</p>
+            <p style={{ color: 'var(--textSec)' }}>Loading store items...</p>
           )}
 
           {inventoryLoading && category === "inventory" && (
-            <p className={subTextClass}>Loading your inventory...</p>
+            <p style={{ color: 'var(--textSec)' }}>Loading your inventory...</p>
           )}
 
           {!loading && !inventoryLoading && displayedItems.length === 0 && (
-            <p className={subTextClass}>
+            <p style={{ color: 'var(--textSec)' }}>
               {category === "inventory"
                 ? "You do not own any items yet."
                 : "No items found in this category."}
diff --git a/crackcode/client/src/pages/userprofile/userprofile.jsx b/crackcode/client/src/pages/userprofile/userprofile.jsx
index 38bb3e63..518d079b 100644
--- a/crackcode/client/src/pages/userprofile/userprofile.jsx
+++ b/crackcode/client/src/pages/userprofile/userprofile.jsx
@@ -79,7 +79,8 @@ const UserProfile = () => {
           // Use server-provided fields: totalXP and tokens
           totalXP: data.totalXP ?? data.xp ?? 0,
           tokens: data.tokens ?? 0,
-          rank: "#" + (data.rank || "--")
+          rank: "#" + (data.rank || "--"),
+          avatar: data.avatar || prevData.avatar || ""
         }));
       }
     } catch (error) {
@@ -254,8 +255,16 @@ const UserProfile = () => {
           <div className="rounded-2xl p-8 mb-8" style={{ backgroundColor: 'var(--surface2)', border: '1px solid var(--border)' }}>
             <div className="flex items-center gap-6 mb-8">
               {/* User Avatar Circle - Shows user's profile picture or placeholder */}
-              <div className="w-20 h-20 rounded-full flex items-center justify-center text-4xl" style={{ backgroundColor: 'var(--brand)' }}>
-                {userStatus.avatar || '👤'}
+              <div className="w-20 h-20 rounded-full overflow-hidden flex items-center justify-center text-4xl" style={{ backgroundColor: 'var(--brand)' }}>
+                {(() => {
+                  const raw = userStatus.avatar;
+                  if (!raw) return '👤';
+                  const API_BASE = import.meta.env.VITE_BACKEND_URL || import.meta.env.VITE_API_URL || 'http://localhost:5051';
+                  const src = raw.startsWith('http') ? raw : raw.startsWith('/uploads') ? `${API_BASE}${raw}` : raw.startsWith('/') ? raw : null;
+                  return src
+                    ? <img src={src} alt="avatar" className="w-full h-full object-cover" onError={(e) => { e.currentTarget.style.display = 'none'; e.currentTarget.parentElement.textContent = '👤'; }} />
+                    : raw;
+                })()}
               </div>
 
               {/* User Name and Rank Info */}
diff --git a/crackcode/client/tests/AIAssistantAgent.test.jsx b/crackcode/client/tests/AIAssistantAgent.test.jsx
new file mode 100644
index 00000000..42237d85
--- /dev/null
+++ b/crackcode/client/tests/AIAssistantAgent.test.jsx
@@ -0,0 +1,465 @@
+import React from 'react';
+import { render, screen, waitFor } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest';
+
+// jsdom does not implement scrollIntoView — stub it globally
+window.HTMLElement.prototype.scrollIntoView = vi.fn();
+
+import { EditorProvider, useEditor } from '../src/context/codeEditor/EditorContext';
+import AIAssistantChat from '../src/components/codeEditor/AIAssistantChat';
+
+// ─── Helpers ──────────────────────────────────────────────────────────────────
+
+/**
+ * Renders AIAssistantChat inside a real EditorProvider.
+ * `overrides` are applied via a bridge component so individual tests can
+ * pre-seed context state (aiMessages, aiInput, isAiTyping, code, language, …).
+ */
+const OverrideBridge = ({ children, overrides }) => {
+  const ctx = useEditor();
+  React.useEffect(() => {
+    Object.entries(overrides).forEach(([key, value]) => {
+      const setter = ctx[`set${key.charAt(0).toUpperCase()}${key.slice(1)}`];
+      if (typeof setter === 'function') setter(value);
+    });
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, []);
+  return children;
+};
+
+const renderChat = (overrides = {}) =>
+  render(
+    <EditorProvider>
+      <OverrideBridge overrides={overrides}>
+        <AIAssistantChat />
+      </OverrideBridge>
+    </EditorProvider>
+  );
+
+/** Returns a resolved fetch mock with the given reply text. */
+const mockFetchSuccess = (reply = 'Here is the answer.') =>
+  vi.fn(() =>
+    Promise.resolve({
+      ok: true,
+      status: 200,
+      json: () => Promise.resolve({ success: true, data: { reply } }),
+    })
+  );
+
+/** Returns a resolved fetch mock that the server marks as error. */
+const mockFetchServerError = (message = 'Something went wrong') =>
+  vi.fn(() =>
+    Promise.resolve({
+      ok: true,
+      status: 200,
+      json: () => Promise.resolve({ success: false, message }),
+    })
+  );
+
+/** Returns a rejected fetch mock (network failure). */
+const mockFetchNetworkError = (msg = 'Network error') =>
+  vi.fn(() => Promise.reject(new Error(msg)));
+
+/** Returns a non-ok HTTP response mock. */
+const mockFetchHttpError = (status = 500, body = 'Internal Server Error') =>
+  vi.fn(() =>
+    Promise.resolve({
+      ok: false,
+      status,
+      text: () => Promise.resolve(body),
+    })
+  );
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 1. Initial render — welcome / empty state
+// ═════════════════════════════════════════════════════════════════════════════
+
+describe('AIAssistantChat — initial render', () => {
+  it('shows the Detective AI welcome message when there are no messages', () => {
+    renderChat();
+    expect(
+      screen.getByText(/I'm your AI partner on this case/i)
+    ).toBeInTheDocument();
+  });
+
+  it('shows the "Run your code first" hint in the welcome message', () => {
+    renderChat();
+    expect(screen.getByText(/Run your code first/i)).toBeInTheDocument();
+  });
+
+  it('renders all four suggestion chips when no messages exist', () => {
+    renderChat();
+    ['Explain my error', 'Give me a hint', 'Check complexity', 'Help with loops'].forEach(
+      (chip) => expect(screen.getByRole('button', { name: chip })).toBeInTheDocument()
+    );
+  });
+
+  it('renders the textarea with the correct placeholder', () => {
+    renderChat();
+    expect(screen.getByPlaceholderText('Ask the Detective AI…')).toBeInTheDocument();
+  });
+
+  it('the send button is disabled when input is empty', () => {
+    renderChat();
+    // The send button has no accessible name — query by its parent label context
+    const textarea = screen.getByPlaceholderText('Ask the Detective AI…');
+    expect(textarea.value).toBe('');
+    // The button closest to the textarea is the send button
+    const sendBtn = textarea.closest('div').querySelector('button');
+    expect(sendBtn).toBeDisabled();
+  });
+
+  it('shows the keyboard hint text', () => {
+    renderChat();
+    expect(screen.getByText(/Enter to send/i)).toBeInTheDocument();
+    expect(screen.getByText(/Shift\+Enter for new line/i)).toBeInTheDocument();
+  });
+});
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 2. Input interaction
+// ═════════════════════════════════════════════════════════════════════════════
+
+describe('AIAssistantChat — input interaction', () => {
+  it('updates the textarea as the user types', async () => {
+    renderChat();
+    const input = screen.getByPlaceholderText('Ask the Detective AI…');
+    await userEvent.type(input, 'What is wrong?');
+    expect(input.value).toBe('What is wrong?');
+  });
+
+  it('enables the send button once text is entered', async () => {
+    renderChat();
+    const input = screen.getByPlaceholderText('Ask the Detective AI…');
+    await userEvent.type(input, 'Hello');
+    const sendBtn = input.closest('div').querySelector('button');
+    expect(sendBtn).not.toBeDisabled();
+  });
+
+  it('send button remains disabled when input is only whitespace', async () => {
+    renderChat();
+    const input = screen.getByPlaceholderText('Ask the Detective AI…');
+    await userEvent.type(input, '   ');
+    const sendBtn = input.closest('div').querySelector('button');
+    expect(sendBtn).toBeDisabled();
+  });
+
+  it('clicking a suggestion chip populates the input', async () => {
+    renderChat();
+    await userEvent.click(screen.getByRole('button', { name: 'Give me a hint' }));
+    const input = screen.getByPlaceholderText('Ask the Detective AI…');
+    expect(input.value).toBe('Give me a hint');
+  });
+
+  it('clicking a suggestion chip focuses the input', async () => {
+    renderChat();
+    await userEvent.click(screen.getByRole('button', { name: 'Explain my error' }));
+    expect(screen.getByPlaceholderText('Ask the Detective AI…')).toHaveFocus();
+  });
+});
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 3. Sending a message — successful API response
+// ═════════════════════════════════════════════════════════════════════════════
+
+describe('AIAssistantChat — sending a message (success)', () => {
+  beforeEach(() => {
+    vi.stubGlobal('fetch', mockFetchSuccess('Use a for-loop here.'));
+  });
+  afterEach(() => {
+    vi.unstubAllGlobals();
+  });
+
+  it('appends the user message to the chat after sending', async () => {
+    renderChat();
+    const input = screen.getByPlaceholderText('Ask the Detective AI…');
+    await userEvent.type(input, 'How do I fix this?');
+    await userEvent.click(input.closest('div').querySelector('button'));
+
+    await waitFor(() =>
+      expect(screen.getByText('How do I fix this?')).toBeInTheDocument()
+    );
+  });
+
+  it('clears the input after sending', async () => {
+    renderChat();
+    const input = screen.getByPlaceholderText('Ask the Detective AI…');
+    await userEvent.type(input, 'Question?');
+    await userEvent.click(input.closest('div').querySelector('button'));
+
+    await waitFor(() => expect(input.value).toBe(''));
+  });
+
+  it('shows the assistant reply prefixed with the detective emoji', async () => {
+    renderChat();
+    const input = screen.getByPlaceholderText('Ask the Detective AI…');
+    await userEvent.type(input, 'Help');
+    await userEvent.click(input.closest('div').querySelector('button'));
+
+    await waitFor(() =>
+      expect(screen.getByText(/Use a for-loop here\./)).toBeInTheDocument()
+    );
+  });
+
+  it('hides the welcome message after the first message is sent', async () => {
+    renderChat();
+    const input = screen.getByPlaceholderText('Ask the Detective AI…');
+    await userEvent.type(input, 'Test');
+    await userEvent.click(input.closest('div').querySelector('button'));
+
+    await waitFor(() =>
+      expect(screen.queryByText(/I'm your AI partner on this case/i)).not.toBeInTheDocument()
+    );
+  });
+
+  it('hides the suggestion chips after the first message is sent', async () => {
+    renderChat();
+    const input = screen.getByPlaceholderText('Ask the Detective AI…');
+    await userEvent.type(input, 'Test');
+    await userEvent.click(input.closest('div').querySelector('button'));
+
+    await waitFor(() =>
+      expect(screen.queryByRole('button', { name: 'Give me a hint' })).not.toBeInTheDocument()
+    );
+  });
+
+  it('sends Enter key to submit the message', async () => {
+    renderChat();
+    const input = screen.getByPlaceholderText('Ask the Detective AI…');
+    await userEvent.type(input, 'Keyboard send');
+    await userEvent.keyboard('{Enter}');
+
+    await waitFor(() =>
+      expect(screen.getByText('Keyboard send')).toBeInTheDocument()
+    );
+  });
+
+  it('Shift+Enter does NOT submit the message', async () => {
+    renderChat();
+    const input = screen.getByPlaceholderText('Ask the Detective AI…');
+    await userEvent.type(input, 'No send');
+    // Shift+Enter should add a newline, not submit
+    await userEvent.keyboard('{Shift>}{Enter}{/Shift}');
+
+    // No user message bubble should appear yet
+    expect(screen.queryByText('No send')).toBeInTheDocument(); // still in input
+    expect(fetch).not.toHaveBeenCalled();
+  });
+});
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 4. Sending a message — API error handling
+// ═════════════════════════════════════════════════════════════════════════════
+
+describe('AIAssistantChat — error handling', () => {
+  afterEach(() => {
+    vi.unstubAllGlobals();
+  });
+
+  it('shows an error reply on network failure', async () => {
+    vi.stubGlobal('fetch', mockFetchNetworkError('Network error'));
+    renderChat();
+    const input = screen.getByPlaceholderText('Ask the Detective AI…');
+    await userEvent.type(input, 'Ping');
+    await userEvent.click(input.closest('div').querySelector('button'));
+
+    await waitFor(() =>
+      expect(screen.getByText(/Error: Network error/)).toBeInTheDocument()
+    );
+  });
+
+  it('shows an error reply on HTTP 500 response', async () => {
+    vi.stubGlobal('fetch', mockFetchHttpError(500, 'Internal Server Error'));
+    renderChat();
+    const input = screen.getByPlaceholderText('Ask the Detective AI…');
+    await userEvent.type(input, 'Ping');
+    await userEvent.click(input.closest('div').querySelector('button'));
+
+    await waitFor(() =>
+      expect(screen.getByText(/Error:.*500/)).toBeInTheDocument()
+    );
+  });
+
+  it('shows an error reply when success is false in the response body', async () => {
+    vi.stubGlobal('fetch', mockFetchServerError('Model unavailable'));
+    renderChat();
+    const input = screen.getByPlaceholderText('Ask the Detective AI…');
+    await userEvent.type(input, 'Ping');
+    await userEvent.click(input.closest('div').querySelector('button'));
+
+    await waitFor(() =>
+      expect(screen.getByText(/Error: Model unavailable/)).toBeInTheDocument()
+    );
+  });
+
+  it('error reply is prefixed with the detective emoji', async () => {
+    vi.stubGlobal('fetch', mockFetchNetworkError('Timeout'));
+    renderChat();
+    const input = screen.getByPlaceholderText('Ask the Detective AI…');
+    await userEvent.type(input, 'Ping');
+    await userEvent.click(input.closest('div').querySelector('button'));
+
+    await waitFor(() =>
+      expect(screen.getByText(/🕵️.*Error:/)).toBeInTheDocument()
+    );
+  });
+});
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 5. Typing indicator
+// ═════════════════════════════════════════════════════════════════════════════
+
+describe('AIAssistantChat — typing indicator', () => {
+  it('shows the typing indicator while isAiTyping is true', () => {
+    renderChat({ isAiTyping: true });
+    // The indicator renders 3 bouncing dots inside a flex container;
+    // the parent assistant bubble is present — verify the animated dots exist
+    const dots = document.querySelectorAll('.animate-bounce');
+    expect(dots.length).toBe(3);
+  });
+
+  it('does not show the typing indicator when isAiTyping is false', () => {
+    renderChat({ isAiTyping: false });
+    const dots = document.querySelectorAll('.animate-bounce');
+    expect(dots.length).toBe(0);
+  });
+
+  it('send button is disabled while isAiTyping is true even with text', () => {
+    renderChat({ isAiTyping: true, aiInput: 'some text' });
+    // The component reads aiInput from context, so seed it via overrides
+    const sendBtn = document.querySelector('button[disabled]');
+    expect(sendBtn).toBeInTheDocument();
+  });
+});
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 6. Message history rendering
+// ═════════════════════════════════════════════════════════════════════════════
+
+describe('AIAssistantChat — message history rendering', () => {
+  const existingMessages = [
+    { role: 'user',      text: 'What is a loop?',        id: 1 },
+    { role: 'assistant', text: '🕵️ A loop repeats code.', id: 2 },
+    { role: 'user',      text: 'Thanks!',                id: 3 },
+  ];
+
+  it('renders pre-existing user messages', () => {
+    renderChat({ aiMessages: existingMessages });
+    expect(screen.getByText('What is a loop?')).toBeInTheDocument();
+    expect(screen.getByText('Thanks!')).toBeInTheDocument();
+  });
+
+  it('renders pre-existing assistant messages', () => {
+    renderChat({ aiMessages: existingMessages });
+    expect(screen.getByText('🕵️ A loop repeats code.')).toBeInTheDocument();
+  });
+
+  it('does not show welcome message when aiMessages is non-empty', () => {
+    renderChat({ aiMessages: existingMessages });
+    expect(screen.queryByText(/I'm your AI partner on this case/i)).not.toBeInTheDocument();
+  });
+
+  it('does not show suggestion chips when aiMessages is non-empty', () => {
+    renderChat({ aiMessages: existingMessages });
+    expect(screen.queryByRole('button', { name: 'Explain my error' })).not.toBeInTheDocument();
+  });
+
+  it('renders all messages in the correct order', () => {
+    renderChat({ aiMessages: existingMessages });
+    const texts = screen
+      .getAllByText(/What is a loop\?|🕵️ A loop repeats code\.|Thanks!/);
+    expect(texts[0]).toHaveTextContent('What is a loop?');
+    expect(texts[1]).toHaveTextContent('🕵️ A loop repeats code.');
+    expect(texts[2]).toHaveTextContent('Thanks!');
+  });
+});
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 7. API request payload
+// ═════════════════════════════════════════════════════════════════════════════
+
+describe('AIAssistantChat — API request payload', () => {
+  afterEach(() => {
+    vi.unstubAllGlobals();
+  });
+
+  it('sends question, language, and code to /api/ai/assistant', async () => {
+    const mockFetch = mockFetchSuccess('Answer');
+    vi.stubGlobal('fetch', mockFetch);
+
+    renderChat({ code: 'print("hi")', language: 'python' });
+    const input = screen.getByPlaceholderText('Ask the Detective AI…');
+    await userEvent.type(input, 'Explain please');
+    await userEvent.click(input.closest('div').querySelector('button'));
+
+    await waitFor(() => expect(mockFetch).toHaveBeenCalledOnce());
+
+    const [url, options] = mockFetch.mock.calls[0];
+    expect(url).toBe('/api/ai/assistant');
+    expect(options.method).toBe('POST');
+
+    const body = JSON.parse(options.body);
+    expect(body.question).toBe('Explain please');
+    expect(body.language).toBe('python');
+    expect(body.code).toBe('print("hi")');
+  });
+
+  it('falls back to "python" when language is not set', async () => {
+    const mockFetch = mockFetchSuccess('Answer');
+    vi.stubGlobal('fetch', mockFetch);
+
+    // EditorContext defaults language to 'python', so this just verifies no crash
+    renderChat();
+    const input = screen.getByPlaceholderText('Ask the Detective AI…');
+    await userEvent.type(input, 'Hello');
+    await userEvent.click(input.closest('div').querySelector('button'));
+
+    await waitFor(() => expect(mockFetch).toHaveBeenCalledOnce());
+    const body = JSON.parse(mockFetch.mock.calls[0][1].body);
+    expect(body.language).toBe('python');
+  });
+
+  it('includes the first testResult as lastJudgeResult', async () => {
+    const mockFetch = mockFetchSuccess('Answer');
+    vi.stubGlobal('fetch', mockFetch);
+
+    const testResults = [
+      { status: 'failed', error: 'NameError', details: {} },
+      { status: 'passed', details: {} },
+    ];
+
+    renderChat({ testResults });
+    const input = screen.getByPlaceholderText('Ask the Detective AI…');
+    await userEvent.type(input, 'Why did it fail?');
+    await userEvent.click(input.closest('div').querySelector('button'));
+
+    await waitFor(() => expect(mockFetch).toHaveBeenCalledOnce());
+    const body = JSON.parse(mockFetch.mock.calls[0][1].body);
+    expect(body.lastJudgeResult).toEqual(testResults[0]);
+  });
+
+  it('sends credentials: include with every request', async () => {
+    const mockFetch = mockFetchSuccess('Answer');
+    vi.stubGlobal('fetch', mockFetch);
+
+    renderChat();
+    const input = screen.getByPlaceholderText('Ask the Detective AI…');
+    await userEvent.type(input, 'Hi');
+    await userEvent.click(input.closest('div').querySelector('button'));
+
+    await waitFor(() => expect(mockFetch).toHaveBeenCalledOnce());
+    expect(mockFetch.mock.calls[0][1].credentials).toBe('include');
+  });
+
+  it('does not send when input is empty', async () => {
+    const mockFetch = mockFetchSuccess('Answer');
+    vi.stubGlobal('fetch', mockFetch);
+
+    renderChat();
+    // Try pressing Enter without any text
+    await userEvent.keyboard('{Enter}');
+
+    expect(mockFetch).not.toHaveBeenCalled();
+  });
+});
diff --git a/crackcode/client/tests/Authentication.test.jsx b/crackcode/client/tests/Authentication.test.jsx
new file mode 100644
index 00000000..75ad9de2
--- /dev/null
+++ b/crackcode/client/tests/Authentication.test.jsx
@@ -0,0 +1,524 @@
+import { render, screen, waitFor, fireEvent } from "@testing-library/react";
+import userEvent from "@testing-library/user-event";
+import { MemoryRouter } from "react-router-dom";
+import { vi } from "vitest";
+
+// ─── Shared mocks ────────────────────────────────────────────────────────────
+
+vi.mock("react-toastify", () => ({
+  toast: {
+    success: vi.fn(),
+    error: vi.fn(),
+    info: vi.fn(),
+  },
+}));
+
+const { mockNavigate } = vi.hoisted(() => ({ mockNavigate: vi.fn() }));
+
+vi.mock("react-router-dom", async () => {
+  const actual = await vi.importActual("react-router-dom");
+  return {
+    ...actual,
+    useNavigate: () => mockNavigate,
+  };
+});
+
+// Mock axios used inside auth source files
+vi.mock("axios", async () => {
+  const actual = await vi.importActual("axios");
+  return {
+    ...actual,
+    default: {
+      ...actual.default,
+      get: vi.fn(),
+      post: vi.fn(),
+      defaults: {
+        withCredentials: false,
+        headers: { common: {} },
+      },
+    },
+  };
+});
+
+// Mock SVG/PNG asset imports so Vite doesn't choke in jsdom
+vi.mock("../src/assets/logo/crackcode_logo.svg", () => ({ default: "logo.svg" }));
+vi.mock("../src/assets/logo/logo_dark.png", () => ({ default: "logo_dark.png" }));
+
+// Mock the Header and Button UI components used in EmailVerify
+vi.mock("../src/components/common/Header", () => ({
+  default: () => <div data-testid="mock-header" />,
+}));
+vi.mock("../src/components/ui/Button", () => ({
+  default: ({ children, ...props }) => <button {...props}>{children}</button>,
+}));
+
+// ─── Auth context mock factory ────────────────────────────────────────────────
+
+import { AppContent } from "../src/context/userauth/authenticationContext";
+import React from "react";
+
+const buildAuthContext = (overrides = {}) => ({
+  backendUrl: "http://localhost:5051",
+  isLoggedIn: false,
+  setIsLoggedIn: vi.fn(),
+  userData: false,
+  setUserData: vi.fn(),
+  getUserData: vi.fn(),
+  setAuthHeader: vi.fn(),
+  isLoading: false,
+  ...overrides,
+});
+
+const renderWithAuth = (ui, contextValue, { route = "/" } = {}) =>
+  render(
+    <AppContent.Provider value={contextValue}>
+      <MemoryRouter initialEntries={[route]}>{ui}</MemoryRouter>
+    </AppContent.Provider>
+  );
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 1. Login Component
+// ═════════════════════════════════════════════════════════════════════════════
+import Login from "../src/pages/userauth/Login";
+import axios from "axios";
+
+describe("Login Component", () => {
+  let ctx;
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+    ctx = buildAuthContext();
+    Storage.prototype.getItem = vi.fn(() => null);
+    Storage.prototype.setItem = vi.fn();
+  });
+
+  // ── Rendering ───────────────────────────────────────────────────────────
+
+  it("renders the login form by default", () => {
+    renderWithAuth(<Login />, ctx);
+
+    expect(screen.getByPlaceholderText(/email address/i)).toBeInTheDocument();
+    expect(screen.getByPlaceholderText(/^password$/i)).toBeInTheDocument();
+    expect(screen.getByRole("button", { name: /sign in/i })).toBeInTheDocument();
+  });
+
+  it("shows the 'Forgot password?' link in login mode", () => {
+    renderWithAuth(<Login />, ctx);
+    expect(screen.getByText(/forgot password/i)).toBeInTheDocument();
+  });
+
+  // ── Tab switching ────────────────────────────────────────────────────────
+
+  it("switches to Sign Up form when the Sign Up tab is clicked", async () => {
+    renderWithAuth(<Login />, ctx);
+
+    const signUpTab = screen.getByRole("button", { name: /sign up/i });
+    fireEvent.click(signUpTab);
+
+    expect(await screen.findByPlaceholderText(/full name/i)).toBeInTheDocument();
+    expect(screen.getByPlaceholderText(/confirm password/i)).toBeInTheDocument();
+    expect(screen.getByRole("button", { name: /create account/i })).toBeInTheDocument();
+  });
+
+  it("hides name and confirm-password fields when switching back to Login", async () => {
+    renderWithAuth(<Login />, ctx);
+
+    fireEvent.click(screen.getByRole("button", { name: /sign up/i }));
+    fireEvent.click(screen.getByRole("button", { name: /log in/i }));
+
+    expect(screen.queryByPlaceholderText(/full name/i)).not.toBeInTheDocument();
+    expect(screen.queryByPlaceholderText(/confirm password/i)).not.toBeInTheDocument();
+  });
+
+  // ── Login submission ─────────────────────────────────────────────────────
+
+  it("calls login API and navigates to /home on successful login", async () => {
+    axios.post.mockResolvedValueOnce({
+      data: {
+        success: true,
+        accessToken: "test-token",
+        user: { isAccountVerified: true },
+      },
+    });
+    ctx.getUserData.mockResolvedValueOnce();
+
+    renderWithAuth(<Login />, ctx);
+
+    await userEvent.type(screen.getByPlaceholderText(/email address/i), "user@test.com");
+    await userEvent.type(screen.getByPlaceholderText(/^password$/i), "password123");
+    fireEvent.click(screen.getByRole("button", { name: /sign in/i }));
+
+    await waitFor(() => {
+      expect(axios.post).toHaveBeenCalledWith(
+        expect.stringContaining("/api/auth/login"),
+        expect.objectContaining({ email: "user@test.com", password: "password123" })
+      );
+      expect(ctx.setIsLoggedIn).toHaveBeenCalledWith(true);
+      expect(mockNavigate).toHaveBeenCalledWith("/home");
+    });
+  });
+
+  it("redirects to /verify-account when user is not verified after login", async () => {
+    axios.post
+      .mockResolvedValueOnce({
+        data: {
+          success: true,
+          accessToken: "test-token",
+          user: { isAccountVerified: false },
+        },
+      })
+      .mockResolvedValueOnce({ data: {} }); // send-verify-otp call
+
+    ctx.getUserData.mockResolvedValueOnce();
+
+    renderWithAuth(<Login />, ctx);
+
+    await userEvent.type(screen.getByPlaceholderText(/email address/i), "user@test.com");
+    await userEvent.type(screen.getByPlaceholderText(/^password$/i), "password123");
+    fireEvent.click(screen.getByRole("button", { name: /sign in/i }));
+
+    await waitFor(() => {
+      expect(mockNavigate).toHaveBeenCalledWith("/verify-account");
+    });
+  });
+
+  it("shows an error toast when login API returns success: false", async () => {
+    axios.post.mockResolvedValueOnce({
+      data: { success: false, message: "Invalid credentials" },
+    });
+
+    const { toast } = await import("react-toastify");
+    renderWithAuth(<Login />, ctx);
+
+    await userEvent.type(screen.getByPlaceholderText(/email address/i), "bad@test.com");
+    await userEvent.type(screen.getByPlaceholderText(/^password$/i), "wrongpass");
+    fireEvent.click(screen.getByRole("button", { name: /sign in/i }));
+
+    await waitFor(() => {
+      expect(toast.error).toHaveBeenCalledWith("Invalid credentials");
+    });
+  });
+
+  // ── Registration submission ──────────────────────────────────────────────
+
+  it("shows error when passwords do not match during sign-up", async () => {
+    const { toast } = await import("react-toastify");
+    renderWithAuth(<Login />, ctx);
+
+    fireEvent.click(screen.getByRole("button", { name: /sign up/i }));
+
+    await userEvent.type(screen.getByPlaceholderText(/full name/i), "Alice");
+    await userEvent.type(screen.getByPlaceholderText(/email address/i), "alice@test.com");
+    await userEvent.type(screen.getByPlaceholderText(/^password$/i), "pass1234");
+    await userEvent.type(screen.getByPlaceholderText(/confirm password/i), "different");
+
+    // accept T&C
+    fireEvent.click(screen.getByRole("checkbox"));
+
+    fireEvent.click(screen.getByRole("button", { name: /create account/i }));
+
+    await waitFor(() => {
+      expect(toast.error).toHaveBeenCalledWith("Passwords do not match!");
+    });
+  });
+
+  it("shows error when T&C not accepted during sign-up", async () => {
+    const { toast } = await import("react-toastify");
+    renderWithAuth(<Login />, ctx);
+
+    fireEvent.click(screen.getByRole("button", { name: /sign up/i }));
+
+    await userEvent.type(screen.getByPlaceholderText(/full name/i), "Bob");
+    await userEvent.type(screen.getByPlaceholderText(/email address/i), "bob@test.com");
+    await userEvent.type(screen.getByPlaceholderText(/^password$/i), "pass1234");
+    await userEvent.type(screen.getByPlaceholderText(/confirm password/i), "pass1234");
+    // intentionally NOT checking T&C
+
+    // The submit button is disabled when T&C is unchecked, so submit the form directly
+    fireEvent.submit(document.querySelector("form"));
+
+    await waitFor(() => {
+      expect(toast.error).toHaveBeenCalledWith(
+        "You must accept the Terms and Conditions."
+      );
+    });
+  });
+
+  it("calls register API and navigates to /verify-account on successful sign-up", async () => {
+    axios.post.mockResolvedValueOnce({
+      data: { success: true },
+    });
+
+    const { toast } = await import("react-toastify");
+    renderWithAuth(<Login />, ctx);
+
+    fireEvent.click(screen.getByRole("button", { name: /sign up/i }));
+
+    await userEvent.type(screen.getByPlaceholderText(/full name/i), "Carol");
+    await userEvent.type(screen.getByPlaceholderText(/email address/i), "carol@test.com");
+    await userEvent.type(screen.getByPlaceholderText(/^password$/i), "pass1234");
+    await userEvent.type(screen.getByPlaceholderText(/confirm password/i), "pass1234");
+    fireEvent.click(screen.getByRole("checkbox"));
+    fireEvent.click(screen.getByRole("button", { name: /create account/i }));
+
+    await waitFor(() => {
+      expect(axios.post).toHaveBeenCalledWith(
+        expect.stringContaining("/api/auth/register"),
+        expect.objectContaining({ name: "Carol", email: "carol@test.com" })
+      );
+      expect(toast.success).toHaveBeenCalledWith("OTP sent to your email.");
+      expect(mockNavigate).toHaveBeenCalledWith(
+        "/verify-account",
+        expect.objectContaining({ state: { email: "carol@test.com" } })
+      );
+    });
+  });
+});
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 2. ProtectedRoute Component
+// ═════════════════════════════════════════════════════════════════════════════
+import ProtectedRoute from "../src/components/common/ProtectedRoute";
+
+describe("ProtectedRoute Component", () => {
+  const ChildComponent = () => <div>Protected Content</div>;
+
+  it("renders children when user is logged in and verified", () => {
+    const ctx = buildAuthContext({
+      isLoggedIn: true,
+      userData: { isAccountVerified: true },
+    });
+
+    renderWithAuth(
+      <ProtectedRoute>
+        <ChildComponent />
+      </ProtectedRoute>,
+      ctx
+    );
+
+    expect(screen.getByText("Protected Content")).toBeInTheDocument();
+  });
+
+  it("redirects to /login when user is not logged in", () => {
+    const ctx = buildAuthContext({ isLoggedIn: false });
+
+    const { container } = renderWithAuth(
+      <ProtectedRoute>
+        <ChildComponent />
+      </ProtectedRoute>,
+      ctx,
+      { route: "/home" }
+    );
+
+    expect(screen.queryByText("Protected Content")).not.toBeInTheDocument();
+  });
+
+  it("redirects to /verify-account when logged in but email unverified", () => {
+    const ctx = buildAuthContext({
+      isLoggedIn: true,
+      userData: { isAccountVerified: false },
+    });
+
+    renderWithAuth(
+      <ProtectedRoute requireVerified={true}>
+        <ChildComponent />
+      </ProtectedRoute>,
+      ctx,
+      { route: "/home" }
+    );
+
+    expect(screen.queryByText("Protected Content")).not.toBeInTheDocument();
+  });
+
+  it("renders children when requireVerified is false even if email not verified", () => {
+    const ctx = buildAuthContext({
+      isLoggedIn: true,
+      userData: { isAccountVerified: false },
+    });
+
+    renderWithAuth(
+      <ProtectedRoute requireVerified={false}>
+        <ChildComponent />
+      </ProtectedRoute>,
+      ctx
+    );
+
+    expect(screen.getByText("Protected Content")).toBeInTheDocument();
+  });
+
+  it("shows a loading spinner while auth state is being resolved", () => {
+    const ctx = buildAuthContext({ isLoading: true });
+
+    renderWithAuth(
+      <ProtectedRoute>
+        <ChildComponent />
+      </ProtectedRoute>,
+      ctx
+    );
+
+    expect(screen.queryByText("Protected Content")).not.toBeInTheDocument();
+    // The spinner is rendered as an animate-spin div
+    expect(document.querySelector(".animate-spin")).toBeInTheDocument();
+  });
+});
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 3. EmailVerify Component
+// ═════════════════════════════════════════════════════════════════════════════
+import EmailVerify from "../src/pages/userauth/EmailVerify";
+
+describe("EmailVerify Component", () => {
+  let ctx;
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+    ctx = buildAuthContext();
+    Storage.prototype.setItem = vi.fn();
+  });
+
+  it("renders 6 OTP input boxes and a submit button", () => {
+    renderWithAuth(<EmailVerify />, ctx, { route: "/verify-account" });
+
+    const inputs = screen.getAllByRole("textbox");
+    expect(inputs).toHaveLength(6);
+    expect(screen.getByRole("button", { name: /submit/i })).toBeInTheDocument();
+  });
+
+  it("moves focus to the next box after typing a digit", async () => {
+    renderWithAuth(<EmailVerify />, ctx, { route: "/verify-account" });
+
+    const inputs = screen.getAllByRole("textbox");
+    fireEvent.input(inputs[0], { target: { value: "1" } });
+
+    // After input, the next box should receive focus
+    // (jsdom doesn't natively track focus perfectly, but we verify the handler was wired)
+    expect(inputs[0]).toBeInTheDocument();
+  });
+
+  it("submits OTP and navigates to /gamer-profile on success", async () => {
+    axios.post.mockResolvedValueOnce({
+      data: { success: true, accessToken: "otp-token", message: "Email verified successfully!" },
+    });
+    ctx.getUserData.mockResolvedValueOnce();
+
+    renderWithAuth(<EmailVerify />, ctx, {
+      route: "/verify-account",
+    });
+
+    const inputs = screen.getAllByRole("textbox");
+    const digits = ["1", "2", "3", "4", "5", "6"];
+    digits.forEach((d, i) => {
+      fireEvent.change(inputs[i], { target: { value: d } });
+    });
+
+    fireEvent.click(screen.getByRole("button", { name: /submit/i }));
+
+    await waitFor(() => {
+      expect(axios.post).toHaveBeenCalledWith(
+        expect.stringContaining("/api/auth/verify-account"),
+        expect.objectContaining({ otp: "123456" })
+      );
+      expect(ctx.setIsLoggedIn).toHaveBeenCalledWith(true);
+      expect(mockNavigate).toHaveBeenCalledWith("/gamer-profile");
+    });
+  });
+
+  it("shows error toast when OTP verification fails", async () => {
+    axios.post.mockResolvedValueOnce({
+      data: { success: false, message: "Invalid OTP" },
+    });
+
+    const { toast } = await import("react-toastify");
+    renderWithAuth(<EmailVerify />, ctx, { route: "/verify-account" });
+
+    const inputs = screen.getAllByRole("textbox");
+    inputs.forEach((input) => fireEvent.change(input, { target: { value: "0" } }));
+
+    fireEvent.click(screen.getByRole("button", { name: /submit/i }));
+
+    await waitFor(() => {
+      expect(toast.error).toHaveBeenCalledWith("Invalid OTP");
+    });
+  });
+});
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 4. AuthenticationContext
+// ═════════════════════════════════════════════════════════════════════════════
+import { AppContextProvider } from "../src/context/userauth/authenticationContext";
+import { renderHook, act } from "@testing-library/react";
+import { useContext } from "react";
+
+describe("AuthenticationContext", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    Storage.prototype.getItem = vi.fn(() => null);
+    Storage.prototype.setItem = vi.fn();
+    delete axios.defaults.headers.common["Authorization"];
+  });
+
+  const wrapper = ({ children }) => (
+    <MemoryRouter>
+      <AppContextProvider>{children}</AppContextProvider>
+    </MemoryRouter>
+  );
+
+  it("provides isLoggedIn as false by default", () => {
+    // Prevent the useEffect auth check from making real network calls
+    axios.get.mockRejectedValue(new Error("Network Error"));
+
+    const { result } = renderHook(() => useContext(AppContent), { wrapper });
+    expect(result.current.isLoggedIn).toBe(false);
+  });
+
+  it("sets isLoggedIn to true and calls getUserData when getAuthState succeeds", async () => {
+    axios.get
+      .mockResolvedValueOnce({ data: { success: true } }) // is-auth
+      .mockResolvedValueOnce({ data: { success: true, data: { name: "Alice" } } }); // user/data
+
+    const { result } = renderHook(() => useContext(AppContent), { wrapper });
+
+    await waitFor(() => {
+      expect(result.current.isLoggedIn).toBe(true);
+      expect(result.current.userData).toMatchObject({ name: "Alice" });
+    });
+  });
+
+  it("keeps isLoggedIn false when auth check fails (backend down)", async () => {
+    axios.get.mockRejectedValue(new Error("Network Error"));
+
+    const { result } = renderHook(() => useContext(AppContent), { wrapper });
+
+    await waitFor(() => {
+      expect(result.current.isLoggedIn).toBe(false);
+      expect(result.current.userData).toBe(false);
+    });
+  });
+
+  it("setAuthHeader sets Authorization header when token exists in localStorage", () => {
+    Storage.prototype.getItem = vi.fn(() => "stored-token");
+    axios.get.mockRejectedValue(new Error("Network Error"));
+
+    const { result } = renderHook(() => useContext(AppContent), { wrapper });
+
+    act(() => {
+      result.current.setAuthHeader();
+    });
+
+    expect(axios.defaults.headers.common["Authorization"]).toBe("Bearer stored-token");
+  });
+
+  it("setAuthHeader removes Authorization header when no token in localStorage", () => {
+    Storage.prototype.getItem = vi.fn(() => null);
+    axios.defaults.headers.common["Authorization"] = "Bearer old-token";
+    axios.get.mockRejectedValue(new Error("Network Error"));
+
+    const { result } = renderHook(() => useContext(AppContent), { wrapper });
+
+    act(() => {
+      result.current.setAuthHeader();
+    });
+
+    expect(axios.defaults.headers.common["Authorization"]).toBeUndefined();
+  });
+});
diff --git a/crackcode/client/tests/CareerMap.test.jsx b/crackcode/client/tests/CareerMap.test.jsx
new file mode 100644
index 00000000..6cb801ef
--- /dev/null
+++ b/crackcode/client/tests/CareerMap.test.jsx
@@ -0,0 +1,445 @@
+import { render, screen, fireEvent, waitFor } from "@testing-library/react";
+import { MemoryRouter, Routes, Route } from "react-router-dom";
+import { vi } from "vitest";
+
+// ── Hoisted mocks ─────────────────────────────────────────────────────────────
+const { mockNavigate } = vi.hoisted(() => ({ mockNavigate: vi.fn() }));
+
+// ── Module mocks ──────────────────────────────────────────────────────────────
+vi.mock("react-router-dom", async () => {
+  const actual = await vi.importActual("react-router-dom");
+  return { ...actual, useNavigate: () => mockNavigate };
+});
+
+vi.mock("../src/services/api/careermapService", () => ({
+  fetchProgress: vi.fn(),
+  fetchChapterQuestionCount: vi.fn(),
+  fetchChapterQuestions: vi.fn(),
+  updateProgress: vi.fn(),
+  toBackendCareerId: vi.fn((id) =>
+    ({ "Software-Engineer": "SoftwareEngineer", "ML-Engineer": "MLEngineer", "Data-Scientist": "DataScientist" }[id] || id)
+  ),
+}));
+
+vi.mock("../src/pages/careermap/CareerChapters", () => ({
+  getChapterByCareerId: vi.fn(),
+}));
+
+// Stub layout/nav components that need auth or theme context
+vi.mock("../src/components/common/Footer", () => ({ default: () => <div data-testid="footer" /> }));
+vi.mock("../src/components/common/HQBtn",   () => ({ default: () => <button data-testid="hq-btn">HQ</button> }));
+vi.mock("../src/components/common/Header",  () => ({ default: () => <header data-testid="header" /> }));
+
+// ── Component / data imports ──────────────────────────────────────────────────
+import CareermapMain              from "../src/pages/careermap/CareermapMain";
+import CareerChapterSelectionPage from "../src/pages/careermap/CareerChapterSelection";
+import ResultsPage                from "../src/pages/careermap/Results";
+import {
+  careers,
+  getCareerById,
+  getCareersByDifficulty,
+  getCareersByCategory,
+  getUnlockedCareers,
+  getLockedCareers,
+  getDifficultyLabel,
+} from "../src/pages/careermap/careers";
+import { fetchProgress, fetchChapterQuestionCount } from "../src/services/api/careermapService";
+import { getChapterByCareerId } from "../src/pages/careermap/CareerChapters";
+
+// ── Shared test data ──────────────────────────────────────────────────────────
+const mockChapters = [
+  {
+    id: "oop",
+    title: "Object Oriented Programming",
+    description: "Core OOP concepts",
+    icon: "oop-icon",
+    categories: ["General Programming"],
+  },
+  {
+    id: "dsa",
+    title: "Data Structures & Algorithms",
+    description: "DSA essentials",
+    icon: "dsa-icon",
+    categories: ["Data Structures"],
+  },
+];
+
+// ── Render helpers ────────────────────────────────────────────────────────────
+const renderInRouter = (ui, route = "/") =>
+  render(<MemoryRouter initialEntries={[route]}>{ui}</MemoryRouter>);
+
+/** Renders a component inside Routes so useParams() is populated. */
+const renderChapterPage = (careerId = "Software-Engineer", state = null) =>
+  render(
+    <MemoryRouter initialEntries={[{ pathname: `/careermap/${careerId}`, state }]}>
+      <Routes>
+        <Route path="/careermap/:careerId" element={<CareerChapterSelectionPage />} />
+      </Routes>
+    </MemoryRouter>
+  );
+
+// =============================================================================
+// 1. careers.jsx — Pure utility functions
+// =============================================================================
+describe("careers.jsx – Utility Functions", () => {
+  test("exports exactly 6 career entries", () => {
+    expect(careers).toHaveLength(6);
+  });
+
+  test("every career has required fields", () => {
+    careers.forEach((c) => {
+      expect(c).toHaveProperty("id");
+      expect(c).toHaveProperty("title");
+      expect(c).toHaveProperty("difficulty");
+      expect(typeof c.locked).toBe("boolean");
+      expect(Array.isArray(c.focus)).toBe(true);
+    });
+  });
+
+  test("getCareerById returns the matching career", () => {
+    const se = getCareerById("Software-Engineer");
+    expect(se).toBeDefined();
+    expect(se.title).toBe("Software Engineer");
+  });
+
+  test("getCareerById returns undefined for unknown id", () => {
+    expect(getCareerById("nonexistent-id")).toBeUndefined();
+  });
+
+  test("getCareersByDifficulty returns only careers of that difficulty", () => {
+    const easy = getCareersByDifficulty("easy");
+    expect(easy.length).toBeGreaterThan(0);
+    expect(easy.every((c) => c.difficulty === "easy")).toBe(true);
+
+    const hard = getCareersByDifficulty("hard");
+    expect(hard.every((c) => c.difficulty === "hard")).toBe(true);
+  });
+
+  test("getCareersByCategory returns only careers of that category", () => {
+    const software = getCareersByCategory("software");
+    expect(software.length).toBeGreaterThan(0);
+    expect(software.every((c) => c.category === "software")).toBe(true);
+  });
+
+  test("getUnlockedCareers returns only unlocked careers", () => {
+    const unlocked = getUnlockedCareers();
+    expect(unlocked.length).toBeGreaterThan(0);
+    expect(unlocked.every((c) => !c.locked)).toBe(true);
+  });
+
+  test("getLockedCareers returns only locked careers", () => {
+    const locked = getLockedCareers();
+    expect(locked.length).toBeGreaterThan(0);
+    expect(locked.every((c) => c.locked)).toBe(true);
+  });
+
+  test("unlocked + locked counts equal total careers", () => {
+    expect(getUnlockedCareers().length + getLockedCareers().length).toBe(careers.length);
+  });
+
+  test.each([
+    ["easy",    "BEGINNER"],
+    ["medium",  "INTERMEDIATE"],
+    ["hard",    "ADVANCED"],
+    ["unknown", "BEGINNER"], // fallback
+  ])("getDifficultyLabel('%s') returns '%s'", (input, expected) => {
+    expect(getDifficultyLabel(input)).toBe(expected);
+  });
+});
+
+// =============================================================================
+// 2. CareermapMain — Career Selection Page
+// =============================================================================
+describe("CareermapMain – Career Selection Page", () => {
+  beforeEach(() => mockNavigate.mockClear());
+
+  test("renders the page heading", () => {
+    renderInRouter(<CareermapMain />);
+    expect(screen.getByText(/Choose the best career path/i)).toBeInTheDocument();
+  });
+
+  test("renders all 6 career titles", () => {
+    renderInRouter(<CareermapMain />);
+    [
+      "Software Engineer",
+      "ML Engineer",
+      "Data Scientist",
+      "Backend Developer",
+      "Game Developer",
+      "Web Developer",
+    ].forEach((title) => expect(screen.getByText(title)).toBeInTheDocument());
+  });
+
+  test("renders difficulty badges (BEGINNER, INTERMEDIATE, ADVANCED)", () => {
+    renderInRouter(<CareermapMain />);
+    expect(screen.getByText("BEGINNER")).toBeInTheDocument();
+    expect(screen.getAllByText("INTERMEDIATE").length).toBeGreaterThan(0);
+    expect(screen.getAllByText("ADVANCED").length).toBeGreaterThan(0);
+  });
+
+  test("navigates to career page when an unlocked card is clicked", () => {
+    renderInRouter(<CareermapMain />);
+    fireEvent.click(screen.getByText("Software Engineer"));
+    expect(mockNavigate).toHaveBeenCalledWith(
+      "/careermap/Software-Engineer",
+      expect.objectContaining({ state: expect.any(Object) })
+    );
+  });
+
+  test("does NOT navigate when a locked career card is clicked", () => {
+    renderInRouter(<CareermapMain />);
+    fireEvent.click(screen.getByText("Backend Developer"));
+    expect(mockNavigate).not.toHaveBeenCalled();
+  });
+
+  test("locked careers (Backend Developer, Game Developer, Web Developer) are all rendered", () => {
+    renderInRouter(<CareermapMain />);
+    expect(screen.getByText("Backend Developer")).toBeInTheDocument();
+    expect(screen.getByText("Game Developer")).toBeInTheDocument();
+    expect(screen.getByText("Web Developer")).toBeInTheDocument();
+  });
+
+  test("renders language info for Software Engineer card", () => {
+    renderInRouter(<CareermapMain />);
+    expect(screen.getByText(/Python\/Java/i)).toBeInTheDocument();
+  });
+});
+
+// =============================================================================
+// 3. CareerChapterSelectionPage — Chapter Selection
+// =============================================================================
+describe("CareerChapterSelectionPage – Chapter Selection", () => {
+  beforeEach(() => {
+    mockNavigate.mockClear();
+    vi.clearAllMocks();
+    getChapterByCareerId.mockReturnValue(mockChapters);
+    fetchProgress.mockResolvedValue({ chapters: [] });
+    fetchChapterQuestionCount.mockResolvedValue(15);
+    Storage.prototype.getItem = vi.fn(() => null);
+  });
+
+  test("renders career title from navigation state", async () => {
+    renderChapterPage("Software-Engineer", { title: "Software Engineer" });
+    expect(await screen.findByText("Software Engineer")).toBeInTheDocument();
+  });
+
+  test("falls back to CAREER_TITLES map when no navigation state provided", async () => {
+    renderChapterPage("Software-Engineer", null);
+    expect(await screen.findByText("Software Engineer")).toBeInTheDocument();
+  });
+
+  test("renders all chapter titles", async () => {
+    renderChapterPage();
+    expect(await screen.findByText("Object Oriented Programming")).toBeInTheDocument();
+    expect(await screen.findByText("Data Structures & Algorithms")).toBeInTheDocument();
+  });
+
+  test("first chapter is always unlocked (Start Quiz button visible)", async () => {
+    renderChapterPage();
+    const startBtns = await screen.findAllByText(/Start Quiz/i);
+    expect(startBtns.length).toBeGreaterThanOrEqual(1);
+  });
+
+  test("second chapter is locked when first has not been passed", async () => {
+    // fetchProgress returns no passed chapters; localStorage returns null
+    renderChapterPage();
+    await waitFor(() => screen.getByText("Data Structures & Algorithms"));
+    expect(screen.getAllByText(/Start Quiz/i)).toHaveLength(1);
+  });
+
+  test("second chapter unlocks when first chapter is marked as passed", async () => {
+    fetchProgress.mockResolvedValue({
+      chapters: [{ chapterId: "oop", passed: true, easyScore: 5, mediumScore: 5, hardScore: 5 }],
+    });
+    renderChapterPage();
+    await waitFor(() => screen.getByText("Data Structures & Algorithms"));
+    expect(screen.getAllByText(/Start Quiz/i)).toHaveLength(2);
+  });
+
+  test("calls fetchProgress with the correct careerId", async () => {
+    renderChapterPage("Software-Engineer");
+    await waitFor(() => expect(fetchProgress).toHaveBeenCalledWith("Software-Engineer"));
+  });
+
+  test("calls fetchChapterQuestionCount for each chapter", async () => {
+    renderChapterPage();
+    await waitFor(() =>
+      expect(fetchChapterQuestionCount).toHaveBeenCalledTimes(mockChapters.length)
+    );
+  });
+
+  test("shows 'Career path not found' for an unknown careerId", async () => {
+    getChapterByCareerId.mockReturnValue([]);
+    renderChapterPage("unknown-career");
+    expect(await screen.findByText(/Career path not found/i)).toBeInTheDocument();
+  });
+
+  test("'Back' link navigates to /careermap when career is not found", async () => {
+    getChapterByCareerId.mockReturnValue([]);
+    renderChapterPage("unknown-career");
+    await screen.findByText(/Career path not found/i);
+    fireEvent.click(screen.getByText(/← Back/i));
+    expect(mockNavigate).toHaveBeenCalledWith("/careermap");
+  });
+
+  test("navigates to quiz page when an unlocked chapter is clicked", async () => {
+    renderChapterPage("Software-Engineer", { title: "Software Engineer" });
+    const startBtns = await screen.findAllByText(/Start Quiz/i);
+    fireEvent.click(startBtns[0]);
+    expect(mockNavigate).toHaveBeenCalledWith(
+      "/careermap/Software-Engineer/quiz/oop",
+      expect.objectContaining({ state: expect.any(Object) })
+    );
+  });
+
+  test("falls back to localStorage when fetchProgress rejects", async () => {
+    fetchProgress.mockRejectedValue(new Error("Network error"));
+    Storage.prototype.getItem = vi.fn((key) =>
+      key === "Software-Engineer_oop_passed" ? "true" : null
+    );
+    renderChapterPage("Software-Engineer");
+    // oop passed via localStorage → dsa should be unlocked
+    await waitFor(() =>
+      expect(screen.getAllByText(/Start Quiz/i)).toHaveLength(2)
+    );
+  });
+});
+
+// =============================================================================
+// 4. ResultsPage — Quiz Results
+// =============================================================================
+describe("ResultsPage – Quiz Results", () => {
+  const defaultProps = {
+    score: 10,
+    total: 15,
+    title: "Software Engineer",
+    subtitle: "Object Oriented Programming",
+    careerId: "Software-Engineer",
+    currentChapterId: "oop",
+    onRestart: vi.fn(),
+  };
+
+  beforeEach(() => {
+    mockNavigate.mockClear();
+    Storage.prototype.getItem = vi.fn(() => null);
+    getChapterByCareerId.mockReturnValue(mockChapters);
+  });
+
+  const renderResults = (props = {}) =>
+    renderInRouter(<ResultsPage {...defaultProps} {...props} />);
+
+  test("renders the career title and chapter subtitle", () => {
+    renderResults();
+    // Title may appear in both the heading and the completion banner; check at least one exists
+    expect(screen.getAllByText("Software Engineer").length).toBeGreaterThan(0);
+    expect(screen.getByText("Object Oriented Programming")).toBeInTheDocument();
+  });
+
+  test("renders the score in the score circle", () => {
+    renderResults({ score: 10 });
+    // The score circle contains the raw number
+    expect(screen.getAllByText("10").length).toBeGreaterThan(0);
+  });
+
+  test("renders correct/wrong/percentage stats", () => {
+    renderResults({ score: 10, total: 15 });
+    expect(screen.getByText("5")).toBeInTheDocument();    // wrong = 15 - 10
+    expect(screen.getByText("67%")).toBeInTheDocument();  // Math.round(10/15*100)
+    expect(screen.getByText("Correct")).toBeInTheDocument();
+    expect(screen.getByText("Wrong")).toBeInTheDocument();
+    expect(screen.getByText("Score")).toBeInTheDocument();
+  });
+
+  test("shows 'Perfect Score' when score equals total", () => {
+    renderResults({ score: 15, total: 15 });
+    expect(screen.getByText(/Perfect Score/i)).toBeInTheDocument();
+  });
+
+  test("shows 'Well Done' when score is at least half of total", () => {
+    renderResults({ score: 10, total: 15 });
+    expect(screen.getByText(/Well Done/i)).toBeInTheDocument();
+  });
+
+  test("shows 'Keep Practicing' when score is below half of total", () => {
+    renderResults({ score: 5, total: 15 });
+    expect(screen.getByText(/Keep Practicing/i)).toBeInTheDocument();
+  });
+
+  test("always renders a 'Try Again' button", () => {
+    renderResults();
+    expect(screen.getByText("Try Again")).toBeInTheDocument();
+  });
+
+  test("calls onRestart when 'Try Again' is clicked", () => {
+    const onRestart = vi.fn();
+    renderResults({ onRestart });
+    fireEvent.click(screen.getByText("Try Again"));
+    expect(onRestart).toHaveBeenCalled();
+  });
+
+  test("shows 'Back to Chapters' when score < 8", () => {
+    renderResults({ score: 5 });
+    expect(screen.getByText(/Back to Chapters/i)).toBeInTheDocument();
+  });
+
+  test("navigates to chapter selection on 'Back to Chapters' click", () => {
+    renderResults({ score: 5 });
+    fireEvent.click(screen.getByText(/Back to Chapters/i));
+    expect(mockNavigate).toHaveBeenCalledWith("/careermap/Software-Engineer");
+  });
+
+  test("shows 'Chapter unlocked!' banner when chapter is passed and a next chapter exists", async () => {
+    // Mark oop as passed in localStorage; mockChapters has dsa as next
+    Storage.prototype.getItem = vi.fn((key) =>
+      key === "Software-Engineer_oop_passed" ? "true" : null
+    );
+    renderResults({ score: 10 });
+    expect(await screen.findByText("Chapter unlocked!")).toBeInTheDocument();
+  });
+
+  test("shows 'Next' button when chapter is passed and a next chapter exists", async () => {
+    Storage.prototype.getItem = vi.fn((key) =>
+      key === "Software-Engineer_oop_passed" ? "true" : null
+    );
+    renderResults({ score: 10 });
+    expect(await screen.findByText("Next")).toBeInTheDocument();
+  });
+
+  test("navigates to next chapter quiz on 'Next' button click", async () => {
+    Storage.prototype.getItem = vi.fn((key) =>
+      key === "Software-Engineer_oop_passed" ? "true" : null
+    );
+    renderResults({ score: 10 });
+    fireEvent.click(await screen.findByText("Next"));
+    expect(mockNavigate).toHaveBeenCalledWith(
+      "/careermap/Software-Engineer/quiz/dsa",
+      expect.objectContaining({ state: expect.any(Object) })
+    );
+  });
+
+  test("shows 'Career Path Completed!' on the last chapter when passed", async () => {
+    // Use dsa (index 1 = last in mockChapters) as current chapter
+    Storage.prototype.getItem = vi.fn((key) =>
+      key === "Software-Engineer_dsa_passed" ? "true" : null
+    );
+    renderResults({ score: 10, currentChapterId: "dsa" });
+    expect(await screen.findByText(/Career Path Completed/i)).toBeInTheDocument();
+  });
+
+  test("shows 'Back to Career Map' on the last chapter when passed", async () => {
+    Storage.prototype.getItem = vi.fn((key) =>
+      key === "Software-Engineer_dsa_passed" ? "true" : null
+    );
+    renderResults({ score: 10, currentChapterId: "dsa" });
+    expect(await screen.findByText("Back to Career Map")).toBeInTheDocument();
+  });
+
+  test("navigates to /careermap on 'Back to Career Map' click", async () => {
+    Storage.prototype.getItem = vi.fn((key) =>
+      key === "Software-Engineer_dsa_passed" ? "true" : null
+    );
+    renderResults({ score: 10, currentChapterId: "dsa" });
+    fireEvent.click(await screen.findByText("Back to Career Map"));
+    expect(mockNavigate).toHaveBeenCalledWith("/careermap");
+  });
+});
diff --git a/crackcode/client/tests/CodeEditor.test.jsx b/crackcode/client/tests/CodeEditor.test.jsx
new file mode 100644
index 00000000..c5761ae3
--- /dev/null
+++ b/crackcode/client/tests/CodeEditor.test.jsx
@@ -0,0 +1,629 @@
+import React from 'react';
+import { render, screen, fireEvent, waitFor, act } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { MemoryRouter } from 'react-router-dom';
+import { vi, describe, it, expect, beforeEach, afterEach } from 'vitest';
+
+// ─── Shared mocks ─────────────────────────────────────────────────────────────
+
+const { mockNavigate } = vi.hoisted(() => ({ mockNavigate: vi.fn() }));
+
+vi.mock('react-router-dom', async () => {
+  const actual = await vi.importActual('react-router-dom');
+  return {
+    ...actual,
+    useNavigate: () => mockNavigate,
+    useParams: () => ({ problemId: 'py_fundamentals_001' }),
+    useLocation: () => ({ state: null, pathname: '/editor/py_fundamentals_001' }),
+  };
+});
+
+// Mock @monaco-editor/react — jsdom cannot run Monaco
+vi.mock('@monaco-editor/react', () => ({
+  default: ({ onChange, value, language }) => (
+    <textarea
+      data-testid="monaco-editor"
+      data-language={language}
+      value={value || ''}
+      onChange={(e) => onChange?.(e.target.value)}
+    />
+  ),
+}));
+
+// Mock axios instance used by the components
+vi.mock('../src/api/axios.js', () => ({
+  default: {
+    post: vi.fn(),
+    get: vi.fn(),
+    defaults: { withCredentials: false, headers: { common: {} } },
+  },
+}));
+
+// Mock the useCodeExecution hook so we don't need the full backend
+vi.mock('../src/features/codeEditor/hooks/useCodeExecution.js', () => ({
+  useCodeExecution: () => ({
+    executeCode: vi.fn(),
+  }),
+}));
+
+// Mock useProblemData to avoid real fetch calls
+vi.mock('../src/features/codeEditor/hooks/useProblemData.js', () => ({
+  useProblemData: () => ({
+    error: null,
+    setLanguage: vi.fn(),
+    setLanguageLocked: vi.fn(),
+  }),
+}));
+
+// Mock child components that are not under test in integration scenarios
+vi.mock('../src/components/codeEditor/AIAssistantChat.jsx', () => ({
+  default: () => <div data-testid="ai-assistant-chat">AI Assistant</div>,
+}));
+
+vi.mock('../src/components/codeEditor/ErrorDiagnosisView.jsx', () => ({
+  default: ({ result }) => (
+    <div data-testid="error-diagnosis-view">{result?.error || 'Error view'}</div>
+  ),
+}));
+
+vi.mock('../src/components/common/BackBtn', () => ({
+  default: () => <button data-testid="back-btn">Back</button>,
+}));
+
+vi.mock('../src/components/codeEditor/CaseDetails.jsx', () => ({
+  default: () => <div data-testid="case-details">Case Details</div>,
+}));
+
+vi.mock('../src/components/codeEditor/EditorWrapper.jsx', () => ({
+  default: () => <div data-testid="editor-wrapper">Editor Wrapper</div>,
+}));
+
+// ─── Imports under test ───────────────────────────────────────────────────────
+
+import { EditorProvider, useEditor } from '../src/context/codeEditor/EditorContext';
+import EditorToolbar from '../src/components/codeEditor/EditorToolbar';
+import ConsolePanel from '../src/components/codeEditor/ConsolePanel';
+import CodeEditorPage from '../src/pages/codeEditor/CodeEditorPage';
+import {
+  generateDetectiveMessage,
+  generateErrorHint,
+  generateSuccessSummary,
+  generateFailureSummary,
+} from '../src/features/codeEditor/utils/detectiveMessages';
+
+// ─── Helpers ──────────────────────────────────────────────────────────────────
+
+/** Wraps `ui` inside EditorProvider and MemoryRouter */
+const renderWithEditor = (ui, contextOverrides = {}) => {
+  // A thin wrapper that applies overrides to the real context
+  const Wrapper = ({ children }) => {
+    return (
+      <EditorProvider>
+        <ContextOverrider overrides={contextOverrides}>{children}</ContextOverrider>
+      </EditorProvider>
+    );
+  };
+
+  return render(<MemoryRouter>{ui}</MemoryRouter>, { wrapper: Wrapper });
+};
+
+/**
+ * Reads the real EditorContext and patches it with `overrides`.
+ * This allows tests to set specific state values without reimplementing
+ * the whole context.
+ */
+const ContextOverrider = ({ children, overrides }) => {
+  // We use a helper component that reads context and re-renders children
+  // with applied overrides via a bridge
+  return <OverrideBridge overrides={overrides}>{children}</OverrideBridge>;
+};
+
+// Bridge that applies overrides to context via useEffect mutations
+const OverrideBridge = ({ children, overrides }) => {
+  const ctx = useEditor();
+  React.useEffect(() => {
+    Object.entries(overrides).forEach(([key, value]) => {
+      const setter = ctx[`set${key.charAt(0).toUpperCase()}${key.slice(1)}`];
+      if (typeof setter === 'function') setter(value);
+    });
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, []);
+  return children;
+};
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 1. EditorContext
+// ═════════════════════════════════════════════════════════════════════════════
+
+describe('EditorContext', () => {
+  it('provides default initial values', () => {
+    let ctx;
+    const Capture = () => {
+      ctx = useEditor();
+      return null;
+    };
+
+    render(
+      <EditorProvider>
+        <Capture />
+      </EditorProvider>
+    );
+
+    expect(ctx.currentProblem).toBeNull();
+    expect(ctx.loading).toBe(true);
+    expect(ctx.code).toBe('');
+    expect(ctx.language).toBe('python');
+    expect(ctx.languageLocked).toBe(false);
+    expect(ctx.isExecuting).toBe(false);
+    expect(ctx.testResults).toEqual([]);
+    expect(ctx.showClue).toBe(false);
+    expect(ctx.activeTab).toBe('error-diagnosis');
+    expect(ctx.activeRightTab).toBe('test-cases');
+    expect(ctx.errorHistory).toEqual([]);
+    expect(ctx.attemptCount).toBe(0);
+    expect(ctx.aiMessages).toEqual([]);
+    expect(ctx.aiInput).toBe('');
+    expect(ctx.isAiTyping).toBe(false);
+  });
+
+  it('updates code via setCode', () => {
+    let ctx;
+    const Capture = () => {
+      ctx = useEditor();
+      return null;
+    };
+
+    render(
+      <EditorProvider>
+        <Capture />
+      </EditorProvider>
+    );
+
+    act(() => ctx.setCode('print("hello")'));
+    expect(ctx.code).toBe('print("hello")');
+  });
+
+  it('updates language via setLanguage', () => {
+    let ctx;
+    const Capture = () => {
+      ctx = useEditor();
+      return null;
+    };
+
+    render(
+      <EditorProvider>
+        <Capture />
+      </EditorProvider>
+    );
+
+    act(() => ctx.setLanguage('javascript'));
+    expect(ctx.language).toBe('javascript');
+  });
+
+  it('throws when useEditor is called outside EditorProvider', () => {
+    const BadComponent = () => {
+      useEditor();
+      return null;
+    };
+
+    // Suppress the expected console.error from React
+    const spy = vi.spyOn(console, 'error').mockImplementation(() => {});
+    expect(() => render(<BadComponent />)).toThrow(
+      'useEditor must be used within EditorProvider'
+    );
+    spy.mockRestore();
+  });
+
+  it('updates activeRightTab', () => {
+    let ctx;
+    const Capture = () => {
+      ctx = useEditor();
+      return null;
+    };
+
+    render(
+      <EditorProvider>
+        <Capture />
+      </EditorProvider>
+    );
+
+    act(() => ctx.setActiveRightTab('ai-assistant'));
+    expect(ctx.activeRightTab).toBe('ai-assistant');
+  });
+});
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 2. EditorToolbar
+// ═════════════════════════════════════════════════════════════════════════════
+
+describe('EditorToolbar', () => {
+  const mockProblem = {
+    fileName: 'mystery.py',
+    problemId: 'py_fundamentals_001',
+    starterCode: {
+      python: 'def solve():\n    pass',
+      javascript: 'function solve() {}',
+    },
+  };
+
+  const renderToolbar = (overrides = {}) =>
+    renderWithEditor(<EditorToolbar />, {
+      currentProblem: mockProblem,
+      code: '# my code',
+      language: 'python',
+      languageLocked: false,
+      isExecuting: false,
+      attemptCount: 0,
+      ...overrides,
+    });
+
+  it('renders the file name from currentProblem', () => {
+    renderToolbar();
+    expect(screen.getByText('mystery.py')).toBeInTheDocument();
+  });
+
+  it('renders Run and Submit buttons', () => {
+    renderToolbar();
+    expect(screen.getByTitle('Run code (Ctrl+Enter)')).toBeInTheDocument();
+    expect(screen.getByTitle('Submit solution for official evaluation')).toBeInTheDocument();
+  });
+
+  it('disables Run button while executing', () => {
+    renderToolbar({ isExecuting: true });
+    expect(screen.getByTitle('Run code (Ctrl+Enter)')).toBeDisabled();
+  });
+
+  it('shows "Running…" text while executing', () => {
+    renderToolbar({ isExecuting: true });
+    expect(screen.getByText(/Running/)).toBeInTheDocument();
+  });
+
+  it('shows attempt count badge when attemptCount > 0', () => {
+    renderToolbar({ attemptCount: 3 });
+    expect(screen.getByText(/3 runs/)).toBeInTheDocument();
+  });
+
+  it('shows "1 run" (singular) when attemptCount === 1', () => {
+    renderToolbar({ attemptCount: 1 });
+    expect(screen.getByText(/1 run/)).toBeInTheDocument();
+  });
+
+  it('does not show attempt badge when attemptCount is 0', () => {
+    renderToolbar({ attemptCount: 0 });
+    // The badge renders as "N run(s)" — no digit before "run" means badge is absent
+    expect(screen.queryByText(/^\d+ runs?$/)).not.toBeInTheDocument();
+  });
+
+  it('renders language selector with python selected by default', () => {
+    renderToolbar();
+    const select = screen.getByRole('combobox');
+    expect(select).toHaveValue('python');
+  });
+
+  it('disables language selector when languageLocked is true', () => {
+    renderToolbar({ languageLocked: true });
+    expect(screen.getByRole('combobox')).toBeDisabled();
+  });
+
+  it('shows all four language options', () => {
+    renderToolbar();
+    const select = screen.getByRole('combobox');
+    const options = Array.from(select.options).map((o) => o.value);
+    expect(options).toEqual(['python', 'javascript', 'java', 'cpp']);
+  });
+
+  it('renders the keyboard shortcut hint', () => {
+    renderToolbar();
+    expect(screen.getByText('Ctrl')).toBeInTheDocument();
+    expect(screen.getByText('Enter')).toBeInTheDocument();
+  });
+
+  it('shows default file name when currentProblem has no fileName', () => {
+    renderWithEditor(<EditorToolbar />, {
+      currentProblem: null,
+      code: '',
+      language: 'python',
+      isExecuting: false,
+      attemptCount: 0,
+      languageLocked: false,
+    });
+    expect(screen.getByText('investigation.py')).toBeInTheDocument();
+  });
+
+  it('fires Ctrl+Enter keyboard shortcut without throwing', () => {
+    // The shortcut calls executeCode — since we already mock the hook at
+    // module level this just verifies the listener is registered without error.
+    renderToolbar();
+    expect(() =>
+      fireEvent.keyDown(window, { key: 'Enter', ctrlKey: true })
+    ).not.toThrow();
+  });
+});
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 3. ConsolePanel
+// ═════════════════════════════════════════════════════════════════════════════
+
+describe('ConsolePanel', () => {
+  const renderPanel = (overrides = {}) =>
+    renderWithEditor(<ConsolePanel />, {
+      activeRightTab: 'test-cases',
+      testResults: [],
+      isExecuting: false,
+      errorHistory: [],
+      attemptCount: 0,
+      ...overrides,
+    });
+
+  // ── Tab rendering ──────────────────────────────────────────────────────────
+
+  it('renders all four tabs', () => {
+    renderPanel();
+    expect(screen.getByText('Test Cases')).toBeInTheDocument();
+    expect(screen.getByText('Error Diagnosis')).toBeInTheDocument();
+    expect(screen.getByText('AI Assistant')).toBeInTheDocument();
+    expect(screen.getByText('History')).toBeInTheDocument();
+  });
+
+  it('clicking a tab makes it active', async () => {
+    renderPanel();
+    const aiTab = screen.getByText('AI Assistant');
+    await userEvent.click(aiTab);
+    expect(screen.getByTestId('ai-assistant-chat')).toBeInTheDocument();
+  });
+
+  // ── Test Cases tab ─────────────────────────────────────────────────────────
+
+  it('shows empty-state message when no test results and not executing', () => {
+    renderPanel({ activeRightTab: 'test-cases', testResults: [] });
+    expect(
+      screen.getByText(/Run your code to see test case results/)
+    ).toBeInTheDocument();
+  });
+
+  it('shows loading spinner while executing', () => {
+    renderPanel({ activeRightTab: 'test-cases', isExecuting: true });
+    expect(screen.getByText(/Running test cases/)).toBeInTheDocument();
+  });
+
+  it('renders test case cards after execution', () => {
+    const testResults = [
+      { status: 'passed', details: { input: '5', expected: '25', time: '0.01' } },
+      { status: 'failed', error: 'NameError: name x is not defined', details: { input: '3', expected: '9' } },
+    ];
+    renderPanel({ activeRightTab: 'test-cases', testResults });
+
+    expect(screen.getByText('Test Case 1')).toBeInTheDocument();
+    expect(screen.getByText('Test Case 2')).toBeInTheDocument();
+    // The component renders result.status directly — CSS uppercase applied visually
+    expect(screen.getByText('passed')).toBeInTheDocument();
+    expect(screen.getByText('failed')).toBeInTheDocument();
+  });
+
+  it('renders the pass/fail summary bar', () => {
+    const testResults = [
+      { status: 'passed', details: {} },
+      { status: 'passed', details: {} },
+      { status: 'failed', error: 'err', details: {} },
+    ];
+    renderPanel({ activeRightTab: 'test-cases', testResults });
+
+    // "2/3 passed" summary
+    expect(screen.getByText('2')).toBeInTheDocument();
+    expect(screen.getByText('/3 passed')).toBeInTheDocument();
+  });
+
+  it('shows first line of error message for failed test cases', () => {
+    const testResults = [
+      {
+        status: 'failed',
+        error: 'NameError: name x is not defined\n  at line 2',
+        details: { input: '1', expected: '1' },
+      },
+    ];
+    renderPanel({ activeRightTab: 'test-cases', testResults });
+    expect(screen.getByText('NameError: name x is not defined')).toBeInTheDocument();
+  });
+
+  // ── Error Diagnosis tab ────────────────────────────────────────────────────
+
+  it('shows empty-state message in error diagnosis when no results', () => {
+    renderPanel({ activeRightTab: 'error-diagnosis', testResults: [] });
+    expect(
+      screen.getByText(/Run your code to see error diagnosis here/)
+    ).toBeInTheDocument();
+  });
+
+  it('shows success message when all tests pass', () => {
+    const testResults = [
+      { status: 'passed', details: {} },
+      { status: 'passed', details: {} },
+    ];
+    renderPanel({ activeRightTab: 'error-diagnosis', testResults });
+    expect(screen.getByText('Answer Correct!')).toBeInTheDocument();
+  });
+
+  it('renders ErrorDiagnosisView for the first failed test', () => {
+    const testResults = [
+      { status: 'failed', error: 'TypeError: unsupported operand', details: {} },
+    ];
+    renderPanel({ activeRightTab: 'error-diagnosis', testResults });
+    expect(screen.getByTestId('error-diagnosis-view')).toBeInTheDocument();
+  });
+
+  it('shows analysing spinner while executing in error diagnosis tab', () => {
+    renderPanel({ activeRightTab: 'error-diagnosis', isExecuting: true });
+    expect(screen.getByText(/Analysing evidence/)).toBeInTheDocument();
+  });
+
+  // ── AI Assistant tab ────────────────────────────────────────────────────────
+
+  it('renders AIAssistantChat in the AI assistant tab', () => {
+    renderPanel({ activeRightTab: 'ai-assistant' });
+    expect(screen.getByTestId('ai-assistant-chat')).toBeInTheDocument();
+  });
+
+  // ── History tab ────────────────────────────────────────────────────────────
+
+  it('shows empty history message when no runs recorded', () => {
+    renderPanel({ activeRightTab: 'history', errorHistory: [] });
+    expect(
+      screen.getByText(/Your run history for this problem will appear here/)
+    ).toBeInTheDocument();
+  });
+
+  it('shows run count when history entries exist', () => {
+    const errorHistory = [
+      {
+        id: 1,
+        runIndex: 1,
+        timestamp: '12:00:00',
+        results: [{ status: 'passed', details: {} }],
+        passed: 1,
+        total: 1,
+      },
+      {
+        id: 2,
+        runIndex: 2,
+        timestamp: '12:01:00',
+        results: [{ status: 'failed', error: 'err', details: {} }],
+        passed: 0,
+        total: 1,
+      },
+    ];
+    renderPanel({ activeRightTab: 'history', errorHistory });
+    expect(screen.getByText(/2 runs recorded/)).toBeInTheDocument();
+  });
+
+  it('renders each history entry', () => {
+    const errorHistory = [
+      {
+        id: 1,
+        runIndex: 1,
+        timestamp: '10:30:00',
+        results: [],
+        passed: 1,
+        total: 1,
+      },
+    ];
+    renderPanel({ activeRightTab: 'history', errorHistory });
+    expect(screen.getByText(/Run #1/)).toBeInTheDocument();
+  });
+
+  // ── Error badge on Error Diagnosis tab ────────────────────────────────────
+
+  it('shows error badge count on Error Diagnosis tab when tests fail', () => {
+    const testResults = [
+      { status: 'failed', error: 'err', details: {} },
+      { status: 'failed', error: 'err2', details: {} },
+    ];
+    renderPanel({ activeRightTab: 'test-cases', testResults });
+    // The badge shows "2" for 2 failed tests next to Error Diagnosis tab
+    const badges = screen.getAllByText('2');
+    expect(badges.length).toBeGreaterThan(0);
+  });
+});
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 4. Detective Messages Utility
+// ═════════════════════════════════════════════════════════════════════════════
+
+describe('generateDetectiveMessage', () => {
+  it('returns a non-empty string for "success"', () => {
+    const msg = generateDetectiveMessage('success');
+    expect(typeof msg).toBe('string');
+    expect(msg.length).toBeGreaterThan(0);
+  });
+
+  it('returns a non-empty string for "runtime_error"', () => {
+    const msg = generateDetectiveMessage('runtime_error');
+    expect(typeof msg).toBe('string');
+    expect(msg.length).toBeGreaterThan(0);
+  });
+
+  it('returns a non-empty string for "compile_error"', () => {
+    const msg = generateDetectiveMessage('compile_error');
+    expect(typeof msg).toBe('string');
+    expect(msg.length).toBeGreaterThan(0);
+  });
+
+  it('returns a non-empty string for "wrong_answer"', () => {
+    const msg = generateDetectiveMessage('wrong_answer');
+    expect(typeof msg).toBe('string');
+    expect(msg.length).toBeGreaterThan(0);
+  });
+
+  it('returns the fallback message for an unknown type', () => {
+    expect(generateDetectiveMessage('unknown_type')).toBe(
+      'The investigation continues...'
+    );
+  });
+});
+
+describe('generateErrorHint', () => {
+  it('returns IndexError hint for out-of-bounds errors', () => {
+    const hint = generateErrorHint('runtime_error', 'IndexError: list index out of range');
+    expect(hint).toMatch(/array indices/i);
+  });
+
+  it('returns NameError hint for undefined variable errors', () => {
+    const hint = generateErrorHint('runtime_error', 'NameError: name x is not defined');
+    expect(hint).toMatch(/variable names/i);
+  });
+
+  it('returns TypeError hint for type mismatch errors', () => {
+    const hint = generateErrorHint('runtime_error', 'TypeError: unsupported operand');
+    expect(hint).toMatch(/data types/i);
+  });
+
+  it('returns SyntaxError hint for syntax errors', () => {
+    const hint = generateErrorHint('compile_error', 'SyntaxError: invalid syntax');
+    expect(hint).toMatch(/syntax/i);
+  });
+
+  it('returns ZeroDivisionError hint for division by zero', () => {
+    const hint = generateErrorHint('runtime_error', 'ZeroDivisionError: division by zero');
+    expect(hint).toMatch(/zero/i);
+  });
+
+  it('returns the generic fallback for unknown error messages', () => {
+    const hint = generateErrorHint('runtime_error', 'something completely unknown');
+    expect(hint).toMatch(/trace through your code/i);
+  });
+});
+
+describe('generateSuccessSummary', () => {
+  it('returns a string that includes totalTests count and language', () => {
+    const msg = generateSuccessSummary(3, 'Python');
+    expect(msg).toMatch(/3/);
+    expect(msg).toMatch(/Python/);
+  });
+});
+
+describe('generateFailureSummary', () => {
+  it('returns a string that includes passed count', () => {
+    const msg = generateFailureSummary(2, 5);
+    expect(typeof msg).toBe('string');
+    expect(msg.length).toBeGreaterThan(0);
+    // All four template strings include the passedTests count
+    expect(msg).toMatch(/2/);
+  });
+});
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 5. CodeEditorPage (integration smoke test)
+// ═════════════════════════════════════════════════════════════════════════════
+
+describe('CodeEditorPage', () => {
+  it('renders the back button, case details, and editor wrapper', () => {
+    render(
+      <MemoryRouter initialEntries={['/editor/py_fundamentals_001']}>
+        <CodeEditorPage />
+      </MemoryRouter>
+    );
+
+    expect(screen.getByTestId('back-btn')).toBeInTheDocument();
+    expect(screen.getByTestId('case-details')).toBeInTheDocument();
+    expect(screen.getByTestId('editor-wrapper')).toBeInTheDocument();
+  });
+});
diff --git a/crackcode/client/tests/DetectiveStore.test.jsx b/crackcode/client/tests/DetectiveStore.test.jsx
new file mode 100644
index 00000000..27abee9e
--- /dev/null
+++ b/crackcode/client/tests/DetectiveStore.test.jsx
@@ -0,0 +1,323 @@
+import { render, screen, waitFor, fireEvent } from "@testing-library/react";
+import { MemoryRouter } from "react-router-dom";
+import DetectiveStore from "../src/pages/shop/DetectiveStore";
+
+
+// If using Vitest, use vi.fn(). If using Jest, use jest.fn()
+import { vi } from "vitest"; 
+
+// Mock Toastify so it doesn't throw errors
+vi.mock("react-toastify", () => ({
+  toast: {
+    success: vi.fn(),
+    error: vi.fn(),
+    info: vi.fn(),
+  },
+}));
+
+// 1. Use vi.hoisted so Vitest knows about this BEFORE mocking
+const { mockNavigate, mockSetTheme } = vi.hoisted(() => ({
+  mockNavigate: vi.fn(),
+  mockSetTheme: vi.fn(),
+}));
+
+// 2. Now mock react-router-dom safely
+vi.mock("react-router-dom", async () => {
+  const actual = await vi.importActual("react-router-dom");
+  return {
+    ...actual,
+    useNavigate: () => mockNavigate,
+  };
+});
+
+vi.mock("../src/context/theme/ThemeContext", () => ({
+    useTheme: () => ({
+      theme: "midnight",
+      setTheme: mockSetTheme,
+    }),
+  }));
+
+// Setup a helper function to wrap the component with needed Contexts
+const renderWithProviders = (ui, { route = "/store" } = {}) => {
+    return render(
+      <MemoryRouter initialEntries={[route]}>
+        {ui}
+      </MemoryRouter>
+    );
+  };
+
+// Mock the global fetch API
+global.fetch = vi.fn();
+
+describe("DetectiveStore Component", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    
+    // Mock localStorage for the token
+    Storage.prototype.getItem = vi.fn(() => "mock-token");
+
+    // Setup default successful responses for the 3 initial API calls
+    global.fetch.mockImplementation(async (url) => {
+      if (url.includes("/api/profile")) {
+        return { ok: true, json: async () => ({ user: { username: "Sherlock", tokens: 500 } }) };
+      }
+      if (url.includes("/api/shop/items")) {
+        return { 
+          ok: true, 
+          json: async () => ([
+            { _id: "item1", name: "Trench Coat", category: "avatar", pricing: { type: "tokens", amount: 100 } },
+            { _id: "item2", name: "Magnifying Glass", category: "avatar", pricing: { type: "paid", amount: 5 } }
+          ]) 
+        };
+      }
+      if (url.includes("/api/shop/inventory")) {
+        return { ok: true, json: async () => ([]) };
+      }
+      return { ok: false, status: 404 };
+    });
+  });
+
+  
+  // Check if the UI loads user data and items correctly
+ 
+  it("fetches and displays the user profile and store items on load", async () => {
+    renderWithProviders(<DetectiveStore />);
+
+    // Verify it shows loading state initially
+    expect(screen.getByText("Loading store items...")).toBeInTheDocument();
+
+    // Wait for the async fetch calls to resolve and UI to update
+    await waitFor(() => {
+      expect(screen.queryByText("Loading store items...")).not.toBeInTheDocument();
+    });
+
+    // Check if profile loaded (500 tokens from our mock)
+    expect(screen.getByText("500 Tokens")).toBeInTheDocument();
+    
+    // Because StoreGrid is a child component, we'll verify it received the items 
+    // by checking if the item names made it to the DOM
+    expect(await screen.findByText("Trench Coat")).toBeInTheDocument();
+  });
+
+  
+  // TEST 2: Check token purchase interaction
+  
+  it("calls the purchase API when buying an item with tokens", async () => {
+    renderWithProviders(<DetectiveStore />);
+
+    // Wait for items to load
+    await waitFor(() => {
+      expect(screen.queryByText("Loading store items...")).not.toBeInTheDocument();
+    });
+
+    screen.debug();
+
+    // Temporarily change the fetch mock to intercept the POST request for purchasing
+    global.fetch.mockImplementationOnce(async (url, options) => {
+      if (url.includes("/api/shop/purchase") && options.method === "POST") {
+        return { ok: true, json: async () => ({ success: true, message: "Purchase successful!" }) };
+      }
+    });
+
+    
+    // If your button just says "Buy", change this to match
+
+    const buyButtons = await screen.findAllByText(/Buy/i);
+    fireEvent.click(buyButtons[0]);
+
+    // Verify the API was called with the correct endpoint
+    await waitFor(() => {
+      expect(global.fetch).toHaveBeenCalledWith(
+        expect.stringContaining("/api/shop/purchase"),
+        expect.objectContaining({
+          method: "POST",
+          headers: expect.objectContaining({
+            "Content-Type": "application/json",
+            "Authorization": "Bearer mock-token"
+          }),
+        })
+      );
+    });
+  });
+
+  
+
+  // TEST 3: Check Stripe success redirect logic
+  
+  it("verifies the Stripe session and updates inventory on payment=success", async () => {
+    
+    // 1. Intercept fetch safely, maintaining basic responses for the standard loaders
+    global.fetch.mockImplementation(async (url) => {
+      if (url.includes("/api/payment/verify-session")) {
+        return { ok: true, json: async () => ({ success: true }) };
+      }
+      if (url.includes("/api/profile")) return { ok: true, json: async () => ({ user: { tokens: 500 } }) };
+      if (url.includes("/api/shop/items")) return { ok: true, json: async () => ([]) };
+      if (url.includes("/api/shop/inventory")) return { ok: true, json: async () => ([]) };
+      return { ok: true, json: async () => ({}) }; 
+    });
+
+    const { toast } = await import("react-toastify");
+
+    // 2. Render the component exactly as Stripe would redirect the user
+    renderWithProviders(<DetectiveStore />, {
+      route: "/store?payment=success&session_id=cs_test_123"
+    });
+
+    await waitFor(() => {
+      // 3. Did it ask the backend to verify the Stripe session?
+      expect(global.fetch).toHaveBeenCalledWith(
+        expect.stringContaining("/api/payment/verify-session?session_id=cs_test_123"),
+        expect.any(Object)
+      );
+
+      // 4. Did it show the success message? (Removed the 'undefined' argument!)
+      expect(toast.success).toHaveBeenCalledWith(
+        expect.stringContaining("Payment successful")
+      );
+
+      // 5. Did it clean up the URL parameters?
+      expect(mockNavigate).toHaveBeenCalledWith("/store", { replace: true });
+    });
+  });
+
+  
+  // TEST 4: Check Inventory Tab Switching
+  
+  it("switches to the inventory tab and displays owned items", async () => {
+    // 1. Mock the API to return a specific item in the inventory
+    global.fetch.mockImplementation(async (url) => {
+      if (url.includes("/api/profile")) return { ok: true, json: async () => ({ user: { tokens: 500 } }) };
+      if (url.includes("/api/shop/items")) return { ok: true, json: async () => ([]) };
+      if (url.includes("/api/shop/inventory")) {
+        return { 
+          ok: true, 
+          json: async () => ([
+            { 
+              _id: "inv1", 
+              itemId: { _id: "theme1", name: "Midnight Theme", category: "theme", metadata: { themeKey: "midnight" } },
+              isEquipped: false 
+            }
+          ]) 
+        };
+      }
+      return { ok: true, json: async () => ({}) }; 
+    });
+
+    renderWithProviders(<DetectiveStore />);
+
+    // Wait for initial load
+    await waitFor(() => expect(screen.queryByText("Loading store items...")).not.toBeInTheDocument());
+
+    // 2. Find and click the Inventory category button in the sidebar
+    // NOTE: Update "Inventory" if your StoreSidebar uses a different label!
+    const inventoryTab = await screen.findByText(/Inventory/i);
+    fireEvent.click(inventoryTab);
+
+    // 3. Verify the inventory item renders on the screen
+    expect(await screen.findByText("Midnight Theme")).toBeInTheDocument();
+  });
+
+  
+  // TEST 5: Check Equip Functionality & Theme Context Update
+  
+  it("calls the equip API and updates the theme context", async () => {
+    
+
+    // Setup the mock API to succeed when equipping
+// Setup the mock API to succeed when equipping
+global.fetch.mockImplementation(async (url, options) => {
+  // Catch the specific equip-item POST request FIRST!
+  if (url.includes("/api/profile/equip-item") && options?.method === "POST") {
+    return { ok: true, json: async () => ({ success: true, message: "Equipped!" }) };
+  }
+  
+  // THEN catch the standard loaders
+  if (url.endsWith("/api/profile")) return { ok: true, json: async () => ({ user: { tokens: 500 } }) };
+  if (url.includes("/api/shop/items")) return { ok: true, json: async () => ([]) };
+  if (url.includes("/api/shop/inventory") && (!options || options.method === "GET")) {
+    return { 
+      ok: true, 
+      json: async () => ([
+        { 
+          _id: "inv1", 
+          itemId: { _id: "theme1", name: "Midnight Theme", category: "theme", metadata: { themeKey: "midnight" } },
+          isEquipped: false 
+        }
+      ]) 
+    };
+  }
+  return { ok: true, json: async () => ({}) }; 
+});
+
+    renderWithProviders(<DetectiveStore />);
+
+    // Wait for load, then click Inventory tab
+    await waitFor(() => expect(screen.queryByText("Loading store items...")).not.toBeInTheDocument());
+    fireEvent.click(await screen.findByText(/Inventory/i));
+
+    screen.debug();
+
+    // 2. Find and click the Equip button
+    // NOTE: Adjust "Equip" if your button says something else
+    const equipButton = await screen.findByText(/Apply Theme/i);
+    fireEvent.click(equipButton);
+
+    await waitFor(() => {
+      // 3. Verify the API was called with the right data
+      expect(global.fetch).toHaveBeenCalledWith(
+        expect.stringContaining("/api/profile/equip-item"),
+        expect.objectContaining({
+          method: "POST",
+          body: JSON.stringify({ itemId: "theme1", category: "theme" })
+        })
+      );
+
+      // 4. Verify the ThemeContext was updated with the new theme key!
+      expect(mockSetTheme).toHaveBeenCalledWith("midnight");
+    });
+  });
+
+  // TEST 6: Check Stripe Checkout Initialization
+  
+  it("calls the checkout API when buying a paid item", async () => {
+    // 1. Setup standard load, plus a paid item in the store
+    global.fetch.mockImplementation(async (url, options) => {
+      if (url.includes("/api/profile")) return { ok: true, json: async () => ({ user: { tokens: 500 } }) };
+      if (url.includes("/api/shop/inventory")) return { ok: true, json: async () => ([]) };
+      if (url.includes("/api/shop/items")) {
+        return { 
+          ok: true, 
+          json: async () => ([
+            { _id: "paid1", name: "Pro Detective Badge", category: "title", pricing: { type: "paid", amount: 5 } }
+          ]) 
+        };
+      }
+      // Intercept the checkout POST
+      if (url.includes("/api/shop/checkout") && options?.method === "POST") {
+        return { ok: true, json: async () => ({ success: true, url: "https://mock-stripe.com/checkout" }) };
+      }
+      return { ok: true, json: async () => ({}) }; 
+    });
+
+    renderWithProviders(<DetectiveStore />);
+
+    await waitFor(() => expect(screen.queryByText("Loading store items...")).not.toBeInTheDocument());
+
+    // 2. Click the button to buy the paid item
+    // NOTE: Change this text to match whatever your paid button says (e.g., "$5.00", "Buy for $5")
+    const paidBuyButton = await screen.findByText(/Buy/i); 
+    fireEvent.click(paidBuyButton);
+
+    // 3. Verify the server was pinged to create the Stripe session
+    await waitFor(() => {
+      expect(global.fetch).toHaveBeenCalledWith(
+        expect.stringContaining("/api/shop/checkout"),
+        expect.objectContaining({
+          method: "POST",
+          body: JSON.stringify({ itemId: "paid1" })
+        })
+      );
+    });
+  });
+});
\ No newline at end of file
diff --git a/crackcode/client/tests/ErrorDiagnosisAgent.test.jsx b/crackcode/client/tests/ErrorDiagnosisAgent.test.jsx
new file mode 100644
index 00000000..ff675d74
--- /dev/null
+++ b/crackcode/client/tests/ErrorDiagnosisAgent.test.jsx
@@ -0,0 +1,345 @@
+import React from 'react';
+import { render, screen, fireEvent } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { vi, describe, it, expect, beforeEach } from 'vitest';
+
+import ErrorDiagnosisView from '../src/components/codeEditor/ErrorDiagnosisView';
+import ErrorConceptCard from '../src/components/codeEditor/ErrorConceptCard';
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 1. ErrorDiagnosisView — null / empty states
+// ═════════════════════════════════════════════════════════════════════════════
+
+describe('ErrorDiagnosisView — null/empty states', () => {
+  it('renders nothing when result is null', () => {
+    const { container } = render(<ErrorDiagnosisView result={null} />);
+    expect(container).toBeEmptyDOMElement();
+  });
+
+  it('renders nothing when result is undefined', () => {
+    const { container } = render(<ErrorDiagnosisView result={undefined} />);
+    expect(container).toBeEmptyDOMElement();
+  });
+});
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 2. ErrorDiagnosisView — error type header
+// ═════════════════════════════════════════════════════════════════════════════
+
+describe('ErrorDiagnosisView — error type header', () => {
+  it('displays the error type name', () => {
+    render(<ErrorDiagnosisView result={{ errorType: 'Name Error' }} />);
+    expect(screen.getByText('Name Error')).toBeInTheDocument();
+  });
+
+  it('shows the test number badge when testNumber is provided', () => {
+    render(<ErrorDiagnosisView result={{ errorType: 'Type Error', testNumber: 2 }} />);
+    expect(screen.getByText('Test 2')).toBeInTheDocument();
+  });
+
+  it('does not render test number badge when testNumber is absent', () => {
+    render(<ErrorDiagnosisView result={{ errorType: 'Type Error' }} />);
+    expect(screen.queryByText(/^Test \d+$/)).not.toBeInTheDocument();
+  });
+
+  it('renders for every known error type without crashing', () => {
+    const errorTypes = [
+      'Wrong Answer', 'Runtime Error', 'Syntax Error', 'Name Error',
+      'Index Error', 'Type Error', 'Zero Division Error', 'Indentation Error',
+      'Value Error', 'Compilation Error', 'Attribute Error', 'Import Error',
+    ];
+
+    errorTypes.forEach((errorType) => {
+      const { unmount } = render(<ErrorDiagnosisView result={{ errorType }} />);
+      expect(screen.getByText(errorType)).toBeInTheDocument();
+      unmount();
+    });
+  });
+
+  it('renders for an unknown error type using fallback style', () => {
+    render(<ErrorDiagnosisView result={{ errorType: 'Unknown Custom Error' }} />);
+    expect(screen.getByText('Unknown Custom Error')).toBeInTheDocument();
+  });
+});
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 3. ErrorDiagnosisView — Wrong Answer output comparison
+// ═════════════════════════════════════════════════════════════════════════════
+
+describe('ErrorDiagnosisView — Wrong Answer output comparison', () => {
+  const waResult = {
+    errorType: 'Wrong Answer',
+    expected: '25',
+    actual: '20',
+  };
+
+  it('shows the Expected / Your Output panel for Wrong Answer', () => {
+    render(<ErrorDiagnosisView result={waResult} />);
+    expect(screen.getByText('Expected')).toBeInTheDocument();
+    expect(screen.getByText('Your Output')).toBeInTheDocument();
+  });
+
+  it('displays the expected value', () => {
+    render(<ErrorDiagnosisView result={waResult} />);
+    expect(screen.getByText('25')).toBeInTheDocument();
+  });
+
+  it('displays the actual output value', () => {
+    render(<ErrorDiagnosisView result={waResult} />);
+    expect(screen.getByText('20')).toBeInTheDocument();
+  });
+
+  it('shows "no output" when actual is falsy', () => {
+    render(<ErrorDiagnosisView result={{ ...waResult, actual: '' }} />);
+    expect(screen.getByText('no output')).toBeInTheDocument();
+  });
+
+  it('JSON-stringifies object expected values', () => {
+    render(<ErrorDiagnosisView result={{ errorType: 'Wrong Answer', expected: { a: 1 }, actual: '{}' }} />);
+    expect(screen.getByText('{"a":1}')).toBeInTheDocument();
+  });
+
+  it('does not show Expected/Actual panel for non-Wrong-Answer errors', () => {
+    render(<ErrorDiagnosisView result={{ errorType: 'Name Error', expected: 'foo', actual: 'bar' }} />);
+    expect(screen.queryByText('Expected')).not.toBeInTheDocument();
+  });
+
+  it('does not show Expected/Actual panel when expected is null', () => {
+    render(<ErrorDiagnosisView result={{ errorType: 'Wrong Answer', expected: null }} />);
+    expect(screen.queryByText('Expected')).not.toBeInTheDocument();
+  });
+});
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 4. ErrorDiagnosisView — raw error message section
+// ═════════════════════════════════════════════════════════════════════════════
+
+describe('ErrorDiagnosisView — raw error message', () => {
+  it('shows the raw error block for non-Wrong-Answer errors', () => {
+    render(<ErrorDiagnosisView result={{ errorType: 'Name Error', rawError: 'NameError: x is not defined' }} />);
+    expect(screen.getByText('Error Message')).toBeInTheDocument();
+    expect(screen.getByText('NameError: x is not defined')).toBeInTheDocument();
+  });
+
+  it('does not show raw error block when rawError is absent', () => {
+    render(<ErrorDiagnosisView result={{ errorType: 'Name Error' }} />);
+    expect(screen.queryByText('Error Message')).not.toBeInTheDocument();
+  });
+
+  it('does not show raw error block for Wrong Answer even if rawError is set', () => {
+    render(<ErrorDiagnosisView result={{ errorType: 'Wrong Answer', rawError: 'some raw error', expected: '1', actual: '2' }} />);
+    expect(screen.queryByText('Error Message')).not.toBeInTheDocument();
+  });
+});
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 5. ErrorDiagnosisView — fallback (no AI) content
+// ═════════════════════════════════════════════════════════════════════════════
+
+describe('ErrorDiagnosisView — fallback built-in content', () => {
+  it('shows "What went wrong" section', () => {
+    render(<ErrorDiagnosisView result={{ errorType: 'Name Error' }} />);
+    expect(screen.getByText('What went wrong')).toBeInTheDocument();
+  });
+
+  it('shows the built-in whatWentWrong text for Name Error', () => {
+    render(<ErrorDiagnosisView result={{ errorType: 'Name Error' }} />);
+    expect(screen.getByText(/variable or function name/i)).toBeInTheDocument();
+  });
+
+  it('shows "Steps to check" section', () => {
+    render(<ErrorDiagnosisView result={{ errorType: 'Name Error' }} />);
+    expect(screen.getByText('Steps to check')).toBeInTheDocument();
+  });
+
+  it('renders numbered steps for the Name Error fallback', () => {
+    render(<ErrorDiagnosisView result={{ errorType: 'Name Error' }} />);
+    // Name Error has 3 steps
+    expect(screen.getByText('1')).toBeInTheDocument();
+    expect(screen.getByText('2')).toBeInTheDocument();
+    expect(screen.getByText('3')).toBeInTheDocument();
+  });
+
+  it('shows the generic fallback whatWentWrong for unknown error types', () => {
+    render(<ErrorDiagnosisView result={{ errorType: 'Unknown Error' }} />);
+    expect(screen.getByText(/unexpected error occurred/i)).toBeInTheDocument();
+  });
+
+  it('shows all fallback error types with their correct descriptions', () => {
+    const cases = [
+      ['Index Error',        /position in a list or string/i],
+      ['Type Error',         /wrong type/i],
+      ['Syntax Error',       /grammatical error/i],
+      ['Zero Division Error',/divide a number by zero/i],
+      ['Indentation Error',  /spacing.*indentation/i],
+      ['Value Error',        /invalid value/i],
+      ['Compilation Error',  /could not even be compiled/i],
+      ['Wrong Answer',       /logic or calculation/i],
+    ];
+
+    cases.forEach(([errorType, pattern]) => {
+      const { unmount } = render(<ErrorDiagnosisView result={{ errorType }} />);
+      expect(screen.getByText(pattern)).toBeInTheDocument();
+      unmount();
+    });
+  });
+});
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 6. ErrorDiagnosisView — AI analysis content
+// ═════════════════════════════════════════════════════════════════════════════
+
+describe('ErrorDiagnosisView — AI analysis content', () => {
+  const aiResult = {
+    errorType: 'Name Error',
+    aiAnalysis: {
+      simplifiedMessage: 'You used a variable before defining it.',
+      whatWentWrong: 'AI-powered explanation of name error.',
+      actionableSteps: ['Step A from AI', 'Step B from AI'],
+      conceptTitle: 'Variable Scope',
+      conceptLesson: 'Variables must be defined before use.',
+    },
+  };
+
+  it('renders the AI simplified message', () => {
+    render(<ErrorDiagnosisView result={aiResult} />);
+    expect(screen.getByText('You used a variable before defining it.')).toBeInTheDocument();
+  });
+
+  it('shows the "AI Analysis" label next to the simplified message', () => {
+    render(<ErrorDiagnosisView result={aiResult} />);
+    expect(screen.getByText(/AI Analysis/)).toBeInTheDocument();
+  });
+
+  it('renders the AI whatWentWrong text instead of fallback', () => {
+    render(<ErrorDiagnosisView result={aiResult} />);
+    expect(screen.getByText('AI-powered explanation of name error.')).toBeInTheDocument();
+    // fallback text should NOT appear
+    expect(screen.queryByText(/variable or function name was used that hasn't been defined/i)).not.toBeInTheDocument();
+  });
+
+  it('renders AI actionable steps', () => {
+    render(<ErrorDiagnosisView result={aiResult} />);
+    expect(screen.getByText('Step A from AI')).toBeInTheDocument();
+    expect(screen.getByText('Step B from AI')).toBeInTheDocument();
+  });
+
+  it('renders the AI concept card with the concept title', () => {
+    render(<ErrorDiagnosisView result={aiResult} />);
+    expect(screen.getByText(/Variable Scope/)).toBeInTheDocument();
+  });
+
+  it('does not show the simplified message block when aiAnalysis is absent', () => {
+    render(<ErrorDiagnosisView result={{ errorType: 'Name Error' }} />);
+    expect(screen.queryByText(/AI Analysis/)).not.toBeInTheDocument();
+  });
+
+  it('does not render concept card when no conceptTitle is provided', () => {
+    render(<ErrorDiagnosisView result={{ errorType: 'Name Error', aiAnalysis: { simplifiedMessage: 'msg' } }} />);
+    expect(screen.queryByText(/Concept:/)).not.toBeInTheDocument();
+  });
+});
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 7. ErrorDiagnosisView — inline ConceptCard (toggle behaviour)
+// ═════════════════════════════════════════════════════════════════════════════
+
+describe('ErrorDiagnosisView — inline ConceptCard toggle', () => {
+  const resultWithConcept = {
+    errorType: 'Name Error',
+    aiAnalysis: {
+      conceptTitle: 'Variable Scope',
+      conceptLesson: 'A variable must be declared before it can be used.',
+    },
+  };
+
+  it('concept lesson is hidden by default', () => {
+    render(<ErrorDiagnosisView result={resultWithConcept} />);
+    expect(screen.queryByText('A variable must be declared before it can be used.')).not.toBeInTheDocument();
+  });
+
+  it('concept lesson appears after clicking the toggle button', async () => {
+    render(<ErrorDiagnosisView result={resultWithConcept} />);
+    const toggleBtn = screen.getByRole('button', { name: /Concept: Variable Scope/i });
+    await userEvent.click(toggleBtn);
+    expect(screen.getByText('A variable must be declared before it can be used.')).toBeInTheDocument();
+  });
+
+  it('concept lesson collapses after clicking the toggle a second time', async () => {
+    render(<ErrorDiagnosisView result={resultWithConcept} />);
+    const toggleBtn = screen.getByRole('button', { name: /Concept: Variable Scope/i });
+    await userEvent.click(toggleBtn);
+    await userEvent.click(toggleBtn);
+    expect(screen.queryByText('A variable must be declared before it can be used.')).not.toBeInTheDocument();
+  });
+});
+
+// ═════════════════════════════════════════════════════════════════════════════
+// 8. ErrorConceptCard — standalone component
+// ═════════════════════════════════════════════════════════════════════════════
+
+describe('ErrorConceptCard', () => {
+  it('renders nothing when conceptTitle is not provided', () => {
+    const { container } = render(<ErrorConceptCard />);
+    expect(container).toBeEmptyDOMElement();
+  });
+
+  it('renders nothing when conceptTitle is null', () => {
+    const { container } = render(<ErrorConceptCard conceptTitle={null} />);
+    expect(container).toBeEmptyDOMElement();
+  });
+
+  it('shows the concept title in the header', () => {
+    render(<ErrorConceptCard conceptTitle="List Indexing" />);
+    expect(screen.getByText('Concept: List Indexing')).toBeInTheDocument();
+  });
+
+  it('is collapsed by default — lesson text not visible', () => {
+    render(<ErrorConceptCard conceptTitle="List Indexing" conceptLesson="Index starts at 0." />);
+    expect(screen.queryByText('Index starts at 0.')).not.toBeInTheDocument();
+  });
+
+  it('expands to show concept lesson when clicked', async () => {
+    render(<ErrorConceptCard conceptTitle="List Indexing" conceptLesson="Index starts at 0." />);
+    await userEvent.click(screen.getByRole('button'));
+    expect(screen.getByText('Index starts at 0.')).toBeInTheDocument();
+  });
+
+  it('collapses lesson when clicked again', async () => {
+    render(<ErrorConceptCard conceptTitle="List Indexing" conceptLesson="Index starts at 0." />);
+    const btn = screen.getByRole('button');
+    await userEvent.click(btn);
+    await userEvent.click(btn);
+    expect(screen.queryByText('Index starts at 0.')).not.toBeInTheDocument();
+  });
+
+  it('shows fixDirection when expanded', async () => {
+    render(
+      <ErrorConceptCard
+        conceptTitle="Loop Bounds"
+        conceptLesson="Lesson text."
+        fixDirection="Check your loop end condition."
+      />
+    );
+    await userEvent.click(screen.getByRole('button'));
+    expect(screen.getByText('Check your loop end condition.')).toBeInTheDocument();
+  });
+
+  it('does not show fixDirection section when fixDirection is absent', async () => {
+    render(<ErrorConceptCard conceptTitle="Loop Bounds" conceptLesson="Lesson text." />);
+    await userEvent.click(screen.getByRole('button'));
+    expect(screen.queryByText('Where to look')).not.toBeInTheDocument();
+  });
+
+  it('shows "What this means" heading when expanded with a lesson', async () => {
+    render(<ErrorConceptCard conceptTitle="Loop Bounds" conceptLesson="Lesson text." />);
+    await userEvent.click(screen.getByRole('button'));
+    expect(screen.getByText('What this means')).toBeInTheDocument();
+  });
+
+  it('does not show lesson body when conceptLesson is absent', async () => {
+    render(<ErrorConceptCard conceptTitle="Loop Bounds" />);
+    await userEvent.click(screen.getByRole('button'));
+    expect(screen.queryByText('What this means')).not.toBeInTheDocument();
+  });
+});
diff --git a/crackcode/client/vite.config.js b/crackcode/client/vite.config.js
index 25160a54..05ee66c2 100644
--- a/crackcode/client/vite.config.js
+++ b/crackcode/client/vite.config.js
@@ -2,6 +2,7 @@ import { defineConfig } from 'vite'
 import tailwindcss from '@tailwindcss/vite'
 import react from '@vitejs/plugin-react'
 
+
 // https://vite.dev/config/
 export default defineConfig({
   plugins: [react(), tailwindcss()],
@@ -15,5 +16,10 @@ export default defineConfig({
         secure: false,
       }
     }
-  }
+  },
+  test: {
+    globals: true,
+    environment: 'jsdom',
+    setupFiles: './setupTests.js', // We will create this file next
+  },
 })
diff --git a/crackcode/server/package-lock.json b/crackcode/server/package-lock.json
index ed610bb0..72d44665 100644
--- a/crackcode/server/package-lock.json
+++ b/crackcode/server/package-lock.json
@@ -25,1020 +25,4250 @@
         "stripe": "^20.4.1"
       },
       "devDependencies": {
-        "nodemon": "^3.1.4"
+        "jest": "^30.3.0",
+        "nodemon": "^3.1.4",
+        "supertest": "^7.2.2"
       }
     },
-    "node_modules/@google/generative-ai": {
-      "version": "0.24.1",
-      "resolved": "https://registry.npmjs.org/@google/generative-ai/-/generative-ai-0.24.1.tgz",
-      "integrity": "sha512-MqO+MLfM6kjxcKoy0p1wRzG3b4ZZXtPI+z2IE26UogS2Cm/XHO+7gGRBh6gcJsOiIVoH93UwKvW4HdgiOZCy9Q==",
-      "license": "Apache-2.0",
-      "engines": {
-        "node": ">=18.0.0"
-      }
-    },
-    "node_modules/@mongodb-js/saslprep": {
-      "version": "1.4.6",
-      "resolved": "https://registry.npmjs.org/@mongodb-js/saslprep/-/saslprep-1.4.6.tgz",
-      "integrity": "sha512-y+x3H1xBZd38n10NZF/rEBlvDOOMQ6LKUTHqr8R9VkJ+mmQOYtJFxIlkkK8fZrtOiL6VixbOBWMbZGBdal3Z1g==",
+    "node_modules/@babel/code-frame": {
+      "version": "7.29.0",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.29.0.tgz",
+      "integrity": "sha512-9NhCeYjq9+3uxgdtp20LSiJXJvN0FeCtNGpJxuMFZ1Kv3cWUNb6DOhJwUvcVCzKGR66cw4njwM6hrJLqgOwbcw==",
+      "dev": true,
       "license": "MIT",
       "dependencies": {
-        "sparse-bitfield": "^3.0.3"
+        "@babel/helper-validator-identifier": "^7.28.5",
+        "js-tokens": "^4.0.0",
+        "picocolors": "^1.1.1"
+      },
+      "engines": {
+        "node": ">=6.9.0"
       }
     },
-    "node_modules/@redis/bloom": {
-      "version": "5.11.0",
-      "resolved": "https://registry.npmjs.org/@redis/bloom/-/bloom-5.11.0.tgz",
-      "integrity": "sha512-KYiVilAhAFN3057afUb/tfYJpsEyTkQB+tQcn5gVVA7DgcNOAj8lLxe4j8ov8BF6I9C1Fe/kwlbuAICcTMX8Lw==",
+    "node_modules/@babel/compat-data": {
+      "version": "7.29.0",
+      "resolved": "https://registry.npmjs.org/@babel/compat-data/-/compat-data-7.29.0.tgz",
+      "integrity": "sha512-T1NCJqT/j9+cn8fvkt7jtwbLBfLC/1y1c7NtCeXFRgzGTsafi68MRv8yzkYSapBnFA6L3U2VSc02ciDzoAJhJg==",
+      "dev": true,
       "license": "MIT",
       "engines": {
-        "node": ">= 18"
-      },
-      "peerDependencies": {
-        "@redis/client": "^5.11.0"
+        "node": ">=6.9.0"
       }
     },
-    "node_modules/@redis/client": {
-      "version": "5.11.0",
-      "resolved": "https://registry.npmjs.org/@redis/client/-/client-5.11.0.tgz",
-      "integrity": "sha512-GHoprlNQD51Xq2Ztd94HHV94MdFZQ3CVrpA04Fz8MVoHM0B7SlbmPEVIjwTbcv58z8QyjnrOuikS0rWF03k5dQ==",
+    "node_modules/@babel/core": {
+      "version": "7.29.0",
+      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.29.0.tgz",
+      "integrity": "sha512-CGOfOJqWjg2qW/Mb6zNsDm+u5vFQ8DxXfbM09z69p5Z6+mE1ikP2jUXw+j42Pf1XTYED2Rni5f95npYeuwMDQA==",
+      "dev": true,
       "license": "MIT",
       "peer": true,
       "dependencies": {
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+      "integrity": "sha512-+QU2zd6OTD8XWIJCbffaiQeH9U73qIqafo1x6V1snCWYGJf6cVE0cDR4D8xRzcEnfI21IFrUPzPGtcPf8AC+Rw==",
+      "dev": true,
+      "license": "ISC",
+      "dependencies": {
+        "imurmurhash": "^0.1.4",
+        "signal-exit": "^4.0.1"
+      },
+      "engines": {
+        "node": "^14.17.0 || ^16.13.0 || >=18.0.0"
+      }
+    },
+    "node_modules/y18n": {
+      "version": "5.0.8",
+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-5.0.8.tgz",
+      "integrity": "sha512-0pfFzegeDWJHJIAmTLRP2DwHjdF5s7jo9tuztdQxAhINCdvS+3nGINqPd00AphqJR/0LhANUS6/+7SCb98YOfA==",
+      "dev": true,
+      "license": "ISC",
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/yallist": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
+      "integrity": "sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g==",
+      "dev": true,
+      "license": "ISC"
+    },
+    "node_modules/yargs": {
+      "version": "17.7.2",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-17.7.2.tgz",
+      "integrity": "sha512-7dSzzRQ++CKnNI/krKnYRV7JKKPUXMEh61soaHKg9mrWEhzFWhFnxPxGl+69cD1Ou63C13NUPCnmIcrvqCuM6w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "cliui": "^8.0.1",
+        "escalade": "^3.1.1",
+        "get-caller-file": "^2.0.5",
+        "require-directory": "^2.1.1",
+        "string-width": "^4.2.3",
+        "y18n": "^5.0.5",
+        "yargs-parser": "^21.1.1"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/yargs-parser": {
+      "version": "21.1.1",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-21.1.1.tgz",
+      "integrity": "sha512-tVpsJW7DdjecAiFpbIB1e3qxIQsE6NoPc5/eTdrbbIC4h0LVsWhnoa3g+m2HclBIujHzsxZ4VJVA+GUuc2/LBw==",
+      "dev": true,
+      "license": "ISC",
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/yargs/node_modules/ansi-regex": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
+      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/yargs/node_modules/emoji-regex": {
+      "version": "8.0.0",
+      "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
+      "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/yargs/node_modules/string-width": {
+      "version": "4.2.3",
+      "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
+      "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "emoji-regex": "^8.0.0",
+        "is-fullwidth-code-point": "^3.0.0",
+        "strip-ansi": "^6.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/yargs/node_modules/strip-ansi": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
+      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "ansi-regex": "^5.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/yocto-queue": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz",
+      "integrity": "sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
     }
   }
 }
diff --git a/crackcode/server/package.json b/crackcode/server/package.json
index 1ff5e2c5..f168acd7 100644
--- a/crackcode/server/package.json
+++ b/crackcode/server/package.json
@@ -7,7 +7,8 @@
     "start": "node server.js",
     "dev": "nodemon server.js",
     "seed:questions": "node seeds/seedQuestion.js",
-    "seed:shop": "node seeds/seedShopItems.js"
+    "seed:shop": "node seeds/seedShopItems.js",
+    "test": "node --experimental-vm-modules node_modules/jest/bin/jest.js"
   },
   "dependencies": {
     "@google/generative-ai": "^0.24.1",
@@ -26,7 +27,9 @@
     "stripe": "^20.4.1"
   },
   "devDependencies": {
-    "nodemon": "^3.1.4"
+    "jest": "^30.3.0",
+    "nodemon": "^3.1.4",
+    "supertest": "^7.2.2"
   },
   "keywords": [],
   "author": "",
diff --git a/crackcode/server/src/modules/profile/controller.js b/crackcode/server/src/modules/profile/controller.js
index 303b38bf..9b3d38ba 100644
--- a/crackcode/server/src/modules/profile/controller.js
+++ b/crackcode/server/src/modules/profile/controller.js
@@ -1,5 +1,6 @@
 import User from "../auth/User.model.js";
 import Inventory from "../shop/Inventory.model.js";
+import ShopItem from "../shop/ShopItem.model.js";
 import bcrypt from "bcryptjs";
 
 
@@ -7,12 +8,16 @@ import bcrypt from "bcryptjs";
 export const getUserProfile = async (req, res) => {
   try {
     // req.userId comes from session middleware (userAuth)
-    const user = await User.findById(req.userId).select("-password");
+    const user = await User.findById(req.userId)
+      .select("-password")
+      .populate("equippedAvatarItemId", "imageUrl name category")
+      .populate("equippedThemeItemId", "imageUrl name category metadata")
+      .populate("equippedTitleItemId", "imageUrl name category");
 
     if (!user) {
-      return res.status(404).json({ 
-        success: false, 
-        message: "User not found" 
+      return res.status(404).json({
+        success: false,
+        message: "User not found"
       });
     }
 
@@ -33,6 +38,9 @@ export const getUserProfile = async (req, res) => {
         emailSettings: user.emailSettings,
         lastActive: user.lastActive,
         createdAt: user.createdAt,
+        equippedAvatarItemId: user.equippedAvatarItemId,
+        equippedThemeItemId: user.equippedThemeItemId,
+        equippedTitleItemId: user.equippedTitleItemId,
       }
     });
   } catch (error) {
@@ -494,63 +502,6 @@ export const updateNotificationSettings = async (req, res) => {
   }
 };
 
-// Equipping avatar as profile picture store --> my inventory
-
-// import Inventory from "../shop/Inventory.model.js";
-
-// export const equipItem = async (req, res) => {
-//   try {
-//     const userId = req.user._id;
-//     const { itemId, category } = req.body;
-
-//     if (!itemId || !category) {
-//       return res.status(400).json({
-//         success: false,
-//         message: "itemId and category are required",
-//       });
-//     }
-
-//     // check ownership
-//     const owned = await Inventory.findOne({
-//       userId,
-//       itemId,
-//     });
-
-//     if (!owned) {
-//       return res.status(403).json({
-//         success: false,
-//         message: "Item not owned",
-//       });
-//     }
-
-//     const update = {};
-
-//     if (category === "avatar") {
-//       update.equippedAvatarItemId = itemId;
-//     }
-
-//     if (category === "theme") {
-//       update.equippedThemeItemId = itemId;
-//     }
-
-//     if (category === "title") {
-//       update.equippedTitleItemId = itemId;
-//     }
-
-//     await User.findByIdAndUpdate(userId, update);
-
-//     res.json({
-//       success: true,
-//       message: "Item equipped",
-//     });
-//   } catch (error) {
-//     console.error("Equip item error:", error);
-//     res.status(500).json({
-//       success: false,
-//       message: "Failed to equip item",
-//     });
-//   }
-// };
 
 
 
@@ -579,10 +530,16 @@ export const equipItem = async (req, res) => {
       });
     }
 
+    const shopItem = await ShopItem.findById(itemId);
+    if (!shopItem) {
+      return res.status(404).json({ success: false, message: "Item not found" });
+    }
+
     const update = {};
 
     if (category === "avatar") {
       update.equippedAvatarItemId = itemId;
+      update.avatar = shopItem.imageUrl;
     }
 
     if (category === "theme") {
@@ -598,6 +555,7 @@ export const equipItem = async (req, res) => {
     res.json({
       success: true,
       message: "Item equipped",
+      equippedItemId: itemId,
     });
 
   } catch (error) {
diff --git a/crackcode/server/src/modules/shop/Shop.service.js b/crackcode/server/src/modules/shop/Shop.service.js
index 134de9f8..d4332828 100644
--- a/crackcode/server/src/modules/shop/Shop.service.js
+++ b/crackcode/server/src/modules/shop/Shop.service.js
@@ -1,295 +1,3 @@
-
-// // -------------------------------- 2026-03-08 new version ---------------------------------------
-
-
-// import mongoose from "mongoose";
-// import Stripe from "stripe";
-
-// import ShopItem from "./ShopItem.model.js";
-// import Inventory from "./Inventory.model.js";
-// import Purchase from "./Purchase.model.js";
-// import { spendXp } from "../session/transaction.service.js";
-
-
-// // ------------------------------------------------------------
-// // Stripe helper
-// // ------------------------------------------------------------
-// const getStripe = () => {
-//   const secretKey = process.env.STRIPE_SECRET_KEY;
-
-//   if (!secretKey) {
-//     throw new Error("STRIPE_SECRET_KEY is not configured");
-//   }
-
-//   return new Stripe(secretKey);
-// };
-
-// // ------------------------------------------------------------
-// // Buy item with XP / Free
-// // ------------------------------------------------------------
-// export const purchaseItemWithXP = async (userId, itemId) => {
-//   const session = await mongoose.startSession();
-
-//   try {
-//     let result = null;
-
-//     await session.withTransaction(async () => {
-//       // 1) Validate item
-//       const item = await ShopItem.findById(itemId).session(session);
-
-//       if (!item || !item.isActive) {
-//         throw new Error("Item not found or inactive");
-//       }
-
-//       const existingInventory = await Inventory.findOne({ userId, itemId }).session(session);
-
-//       if (existingInventory) {
-//         throw new Error("You already own this item");
-//       }
-      
-
-//       // Only free / xp items can be bought here
-//       if (!item.pricing || !["free", "xp"].includes(item.pricing.type)) {
-//         throw new Error("This item is not available for XP purchase");
-//       }
-
-//       const priceXP =
-//         item.pricing.type === "free" ? 0 : Number(item.pricing.amount || 0);
-
-//       if (!Number.isFinite(priceXP) || priceXP < 0) {
-//         throw new Error("Invalid item price");
-//       }
-
-//       // 2) Spend XP atomically
-//       const spendResult = await spendXp({
-//         userId,
-//         amount: priceXP,
-//         reason: `shop_purchase:${String(item._id)}`,
-//         session,
-//       });
-
-//       const remainingXP =
-//         spendResult?.remainingXP ??
-//         spendResult?.xp ??
-//         spendResult?.balance ??
-//         spendResult?.user?.xp;
-
-//       // 3) Add item to inventory
-//       const updatedInventory = await Inventory.findOneAndUpdate(
-//         { userId, itemId },
-//         {
-//           $setOnInsert: {
-//             userId,
-//             itemId,
-//             category: item.category,
-//           },
-//           $inc: { quantity: 1 },
-//         },
-//         { upsert: true, new: true, session }
-//       );
-
-//       // 4) Save purchase history
-//       await Purchase.create(
-//         [
-//           {
-//             userId,
-//             itemId,
-//             itemName: item.name,
-//             price: priceXP,
-//             xpAfterPurchase: remainingXP ?? null,
-//           },
-//         ],
-//         { session }
-//       );
-
-//       result = {
-//         success: true,
-//         remainingXP: remainingXP ?? null,
-//         inventoryItem: updatedInventory,
-//       };
-//     });
-
-//     return result;
-//   } catch (err) {
-//     throw err;
-//   } finally {
-//     session.endSession();
-//   }
-// };
-
-// // ------------------------------------------------------------
-// // Get active shop items
-// // ------------------------------------------------------------
-// export const getShopItems = async (category) => {
-//   const filter = { isActive: true };
-
-//   if (category && category !== "all") {
-//     filter.category = category;
-//   }
-
-//   const items = await ShopItem.find(filter).sort({ createdAt: -1 });
-//   return items;
-// };
-
-// // ------------------------------------------------------------
-// // Get logged-in user's inventory
-// // ------------------------------------------------------------
-// export const getMyInventory = async (userId, category) => {
-//   const filter = { userId };
-
-//   if (category && category !== "all") {
-//     filter.category = category;
-//   }
-
-//   const inventory = await Inventory.find(filter)
-//     .populate("itemId")
-//     .sort({ createdAt: -1 });
-
-//   return inventory;
-// };
-
-// // ------------------------------------------------------------
-// // Create Stripe checkout session for paid items
-// // ------------------------------------------------------------
-// export const createCheckoutSession = async (userId, itemId) => {
-//   const stripe = getStripe();
-
-//   const item = await ShopItem.findById(itemId);
-
-//   if (!item || !item.isActive) {
-//     throw new Error("Item not found or inactive");
-//   }
-
-//   if (!item.pricing || item.pricing.type !== "paid") {
-//     throw new Error("This item is not available for paid checkout");
-//   }
-
-//   const amount = Number(item.pricing.amount || 0);
-
-//   if (!Number.isFinite(amount) || amount <= 0) {
-//     throw new Error("Invalid paid item price");
-//   }
-
-//   const imageUrl = item.imageUrl
-//     ? item.imageUrl.startsWith("http")
-//       ? item.imageUrl
-//       : `http://localhost:5050${item.imageUrl}`
-//     : null;
-
-//     const session = await stripe.checkout.sessions.create({
-//       mode: "payment",
-//       payment_method_types: ["card"],
-//       client_reference_id: String(userId),
-//       metadata: {
-//         userId: String(userId),
-//         itemId: String(item._id),
-//       },
-//       line_items: [
-//         {
-//           price_data: {
-//             currency: "usd",
-//             product_data: {
-//               name: item.name,
-//               description: item.description || undefined,
-//             },
-//             unit_amount: Math.round(amount * 100),
-//           },
-//           quantity: 1,
-//         },
-//       ],
-//       success_url: `${process.env.CLIENT_URL}/shop/success?session_id={CHECKOUT_SESSION_ID}`,
-//       cancel_url: `${process.env.CLIENT_URL}/shop/cancel`,
-//     });
-    
-//   return {
-//     success: true,
-//     url: session.url,
-//     sessionId: session.id,
-//   };
-  
-// };
-
-// // ------------------------------------------------------------
-// // Finalize paid purchase after Stripe webhook success
-// // ------------------------------------------------------------
-// export const finalizePaidPurchase = async ({
-//   userId,
-//   itemId,
-//   stripeSessionId,
-// }) => {
-//   const session = await mongoose.startSession();
-
-//   try {
-//     let result = null;
-
-//     await session.withTransaction(async () => {
-//       const item = await ShopItem.findById(itemId).session(session);
-
-//       if (!item || !item.isActive) {
-//         throw new Error("Item not found or inactive");
-//       }
-
-//       // Prevent duplicate processing if Stripe retries webhook
-//       const existingPurchase = await Purchase.findOne({
-//         stripeSessionId,
-//       }).session(session);
-
-//       if (existingPurchase) {
-//         result = {
-//           success: true,
-//           alreadyProcessed: true,
-//         };
-//         return;
-//       }
-
-//       // Add item to inventory
-//       const updatedInventory = await Inventory.findOneAndUpdate(
-//         { userId, itemId },
-//         {
-//           $setOnInsert: {
-//             userId,
-//             itemId,
-//             category: item.category,
-//           },
-//           $inc: { quantity: 1 },
-//         },
-//         {
-//           upsert: true,
-//           new: true,
-//           session,
-//         }
-//       );
-
-//       // Save purchase history
-//       await Purchase.create(
-//         [
-//           {
-//             userId,
-//             itemId,
-//             itemName: item.name,
-//             price: Number(item.pricing?.amount || 0),
-//             stripeSessionId,
-//             paymentMethod: "stripe",
-//             currency: "usd",
-//           },
-//         ],
-//         { session }
-//       );
-
-//       result = {
-//         success: true,
-//         inventoryItem: updatedInventory,
-//       };
-//     });
-
-//     return result;
-//   } catch (err) {
-//     throw err;
-//   } finally {
-//     session.endSession();
-//   }
-// };
-
 import mongoose from "mongoose";
 import Stripe from "stripe";
 
diff --git a/crackcode/server/src/modules/shop/routes.js b/crackcode/server/src/modules/shop/routes.js
index ae2161d9..e69de29b 100644
--- a/crackcode/server/src/modules/shop/routes.js
+++ b/crackcode/server/src/modules/shop/routes.js
@@ -1,33 +0,0 @@
-// import express from "express";
-// import userAuth from "../auth/middleware.js";
-
-
-// import {
-//   getShopItems,
-//   purchaseItem,
-//   getUserPurchases,
-//   createShopItem,
-//   getMyInventory   
-// } from "./shop.controller.js";
-
-// const router = express.Router();
-
-// // Public
-// router.get("/items", getShopItems);
-
-// // Protected
-// router.post("/purchase", userAuth, purchaseItem);
-// router.get("/purchases", userAuth, getUserPurchases);
-
-// // Admin (TODO: add admin-role check middleware)
-// router.post("/items", userAuth, createShopItem);
-
-// // Health check
-// router.get("/test", (_req, res) =>
-//   res.json({ success: true, message: "Shop routes working" })
-// );
-
-// // GET user inventory
-// router.get("/inventory", userAuth, getMyInventory);;
-
-// export default router;
\ No newline at end of file
diff --git a/crackcode/server/src/routes/Shop.routes.js b/crackcode/server/src/routes/Shop.routes.js
index b4b21137..d059841e 100644
--- a/crackcode/server/src/routes/Shop.routes.js
+++ b/crackcode/server/src/routes/Shop.routes.js
@@ -1,29 +1,3 @@
-// import express from "express";
-// import authMiddleware from "../modules/auth/middleware.js";
-
-// import { purchaseItem, 
-//         listItems, 
-//         myInventory,
-//         createCheckoutSessionController } from "../controllers/Shop.controller.js";
-
-// const router = express.Router();
-
-// // Public: view store items
-// router.get("/items", listItems);
-
-// // Protected: buy item
-// router.post("/purchase", authMiddleware, purchaseItem);
-
-// // Protected: get user's inventory
-// router.get("/inventory", authMiddleware, myInventory);
-
-// // POST /api/shop/checkout
-// // Creates a Stripe Checkout session for purchasing paid (USD) shop items
-// router.post("/checkout", authMiddleware, createCheckoutSessionController);
-
-// export default router;
-
-
 import express from "express";
 import authMiddleware from "../modules/auth/middleware.js";
 
diff --git a/crackcode/server/tests/aiAssistantAgent.test.js b/crackcode/server/tests/aiAssistantAgent.test.js
new file mode 100644
index 00000000..6039f47c
--- /dev/null
+++ b/crackcode/server/tests/aiAssistantAgent.test.js
@@ -0,0 +1,320 @@
+import { jest } from '@jest/globals';
+
+// ─── MOCK DEPENDENCIES BEFORE IMPORTS ─────────────────────────────────────────
+
+// Mock aiConfig — mutate properties directly so the imported reference stays live
+const mockAiConfig = {
+  enabled: true,
+  assistantEnabled: true,
+  model: 'gemini-2.5-flash',
+  assistantLimitPerMinute: 4,
+};
+jest.unstable_mockModule('../src/services/aiConfig.js', () => ({
+  aiConfig: mockAiConfig,
+}));
+
+// Mock rate limiter
+const mockCheckRateLimit = jest.fn();
+jest.unstable_mockModule('../src/services/aiRateLimiter.js', () => ({
+  checkRateLimit: mockCheckRateLimit,
+}));
+
+// Mock error cache (shared with assistant)
+const mockGetFromCache = jest.fn();
+const mockSaveToCache = jest.fn();
+jest.unstable_mockModule('../src/services/errorCache.js', () => ({
+  getFromCache: mockGetFromCache,
+  saveToCache: mockSaveToCache,
+}));
+
+// Mock Gemini model
+const mockGenerateContent = jest.fn();
+const mockGetGeminiModel = jest.fn();
+jest.unstable_mockModule('../src/services/aiModel.js', () => ({
+  getGeminiModel: mockGetGeminiModel,
+}));
+
+// Mock JSON parser
+const mockSafeParseJSON = jest.fn();
+jest.unstable_mockModule('../src/services/aiJson.js', () => ({
+  safeParseJSON: mockSafeParseJSON,
+}));
+
+// ─── IMPORT AFTER MOCKS ────────────────────────────────────────────────────────
+
+const { askAssistant } = await import('../src/services/aiAssistantAgent.js');
+
+// ─── TEST DATA ─────────────────────────────────────────────────────────────────
+
+const baseInput = {
+  userId: 'user-123',
+  sessionId: 'session-abc',
+  question: 'Why is my loop not working?',
+  language: 'python',
+  code: 'for i in range(10):\nprint(i)',
+  problemTitle: 'Sum of Numbers',
+  problemDescription: 'Return the sum of numbers 1 to n.',
+  lastJudgeResult: { status: 'failed', expected: '55', actual: '0' },
+};
+
+const mockParsedReply = {
+  mode: 'debug',
+  reply: 'Your loop is missing indentation on line 2.',
+  hintTitle: 'Indentation matters',
+  hintText: 'Python uses indentation to define code blocks.',
+  nextStep: 'Indent the print statement inside the loop.',
+  severity: 'info',
+};
+
+// ─── askAssistant ──────────────────────────────────────────────────────────────
+
+describe('askAssistant', () => {
+  beforeEach(() => {
+    jest.clearAllMocks();
+
+    // Reset config to enabled defaults before each test
+    mockAiConfig.enabled = true;
+    mockAiConfig.assistantEnabled = true;
+    mockAiConfig.model = 'gemini-2.5-flash';
+    mockAiConfig.assistantLimitPerMinute = 4;
+
+    // Default: rate limit OK, cache miss, Gemini returns valid JSON
+    mockCheckRateLimit.mockReturnValue({ allowed: true, used: 1, remaining: 3, resetAt: Date.now() + 60000 });
+    mockGetFromCache.mockReturnValue(null);
+    mockSaveToCache.mockReturnValue(undefined);
+    mockGenerateContent.mockResolvedValue({ response: { text: () => JSON.stringify(mockParsedReply) } });
+    mockGetGeminiModel.mockReturnValue({ generateContent: mockGenerateContent });
+    mockSafeParseJSON.mockReturnValue(mockParsedReply);
+  });
+
+  // ── Feature flag checks ────────────────────────────────────────────────────
+
+  test('returns disabled response when master AI switch is off', async () => {
+    mockAiConfig.enabled = false;
+    const result = await askAssistant(baseInput);
+    expect(result.disabled).toBe(true);
+    expect(mockGenerateContent).not.toHaveBeenCalled();
+  });
+
+  test('returns disabled response when assistantEnabled is false', async () => {
+    mockAiConfig.assistantEnabled = false;
+    const result = await askAssistant(baseInput);
+    expect(result.disabled).toBe(true);
+    expect(mockGenerateContent).not.toHaveBeenCalled();
+  });
+
+  test('disabled response includes explanatory message', async () => {
+    mockAiConfig.enabled = false;
+    const result = await askAssistant(baseInput);
+    expect(result.message).toMatch(/disabled/i);
+  });
+
+  // ── Input validation ───────────────────────────────────────────────────────
+
+  test('returns error when question is empty string', async () => {
+    const result = await askAssistant({ ...baseInput, question: '' });
+    expect(result.error).toBeDefined();
+    expect(mockGenerateContent).not.toHaveBeenCalled();
+  });
+
+  test('returns error when question is only whitespace', async () => {
+    const result = await askAssistant({ ...baseInput, question: '   ' });
+    expect(result.error).toBeDefined();
+    expect(mockGenerateContent).not.toHaveBeenCalled();
+  });
+
+  test('returns error when question is null', async () => {
+    const result = await askAssistant({ ...baseInput, question: null });
+    expect(result.error).toBeDefined();
+    expect(mockGenerateContent).not.toHaveBeenCalled();
+  });
+
+  test('validation error response has disabled: false', async () => {
+    const result = await askAssistant({ ...baseInput, question: '' });
+    expect(result.disabled).toBe(false);
+  });
+
+  // ── Rate limiting ──────────────────────────────────────────────────────────
+
+  test('returns rateLimited response when limit is exceeded', async () => {
+    mockCheckRateLimit.mockReturnValue({ allowed: false, used: 5, remaining: 0, resetAt: Date.now() + 30000 });
+    const result = await askAssistant(baseInput);
+    expect(result.rateLimited).toBe(true);
+    expect(mockGenerateContent).not.toHaveBeenCalled();
+  });
+
+  test('rate limited response has disabled: false', async () => {
+    mockCheckRateLimit.mockReturnValue({ allowed: false, used: 5, remaining: 0, resetAt: Date.now() + 30000 });
+    const result = await askAssistant(baseInput);
+    expect(result.disabled).toBe(false);
+  });
+
+  test('rate limited response includes remaining count', async () => {
+    mockCheckRateLimit.mockReturnValue({ allowed: false, used: 5, remaining: 0, resetAt: Date.now() + 30000 });
+    const result = await askAssistant(baseInput);
+    expect(result.remaining).toBe(0);
+  });
+
+  test('rate limited response includes resetAt as seconds (not ms)', async () => {
+    const resetAt = Date.now() + 30000;
+    mockCheckRateLimit.mockReturnValue({ allowed: false, used: 5, remaining: 0, resetAt });
+    const result = await askAssistant(baseInput);
+    // resetAt in response should be seconds until reset, not a timestamp
+    expect(result.resetAt).toBeGreaterThan(0);
+    expect(result.resetAt).toBeLessThanOrEqual(30);
+  });
+
+  test('uses userId as rate limit key when provided', async () => {
+    await askAssistant(baseInput);
+    expect(mockCheckRateLimit).toHaveBeenCalledWith(expect.objectContaining({ userKey: 'user-123' }));
+  });
+
+  test('falls back to sessionId when userId is absent', async () => {
+    await askAssistant({ ...baseInput, userId: undefined });
+    expect(mockCheckRateLimit).toHaveBeenCalledWith(expect.objectContaining({ userKey: 'session-abc' }));
+  });
+
+  test('falls back to "anonymous" when both userId and sessionId are absent', async () => {
+    await askAssistant({ ...baseInput, userId: undefined, sessionId: undefined });
+    expect(mockCheckRateLimit).toHaveBeenCalledWith(expect.objectContaining({ userKey: 'anonymous' }));
+  });
+
+  test('rate limit is checked with assistant feature name', async () => {
+    await askAssistant(baseInput);
+    expect(mockCheckRateLimit).toHaveBeenCalledWith(expect.objectContaining({ feature: 'assistant' }));
+  });
+
+  test('rate limit uses assistantLimitPerMinute from config', async () => {
+    mockAiConfig.assistantLimitPerMinute = 6;
+    await askAssistant(baseInput);
+    expect(mockCheckRateLimit).toHaveBeenCalledWith(expect.objectContaining({ limitPerMinute: 6 }));
+  });
+
+  // ── Cache ──────────────────────────────────────────────────────────────────
+
+  test('returns cached result without calling Gemini', async () => {
+    mockGetFromCache.mockReturnValue(mockParsedReply);
+    const result = await askAssistant(baseInput);
+    expect(result).toMatchObject(mockParsedReply);
+    expect(mockGenerateContent).not.toHaveBeenCalled();
+  });
+
+  test('cached result includes cached: true flag', async () => {
+    mockGetFromCache.mockReturnValue(mockParsedReply);
+    const result = await askAssistant(baseInput);
+    expect(result.cached).toBe(true);
+  });
+
+  test('saves response to cache after successful Gemini call', async () => {
+    await askAssistant(baseInput);
+    expect(mockSaveToCache).toHaveBeenCalledWith(expect.any(String), mockParsedReply);
+  });
+
+  test('does not save to cache on a cache hit', async () => {
+    mockGetFromCache.mockReturnValue(mockParsedReply);
+    await askAssistant(baseInput);
+    expect(mockSaveToCache).not.toHaveBeenCalled();
+  });
+
+  test('cache key includes lastJudgeResult status', async () => {
+    // Two calls with different judge statuses should use different cache keys
+    await askAssistant({ ...baseInput, lastJudgeResult: { status: 'passed' } });
+    await askAssistant({ ...baseInput, lastJudgeResult: { status: 'failed' } });
+    const [firstKey, secondKey] = mockGetFromCache.mock.calls.map(([k]) => k);
+    expect(firstKey).not.toBe(secondKey);
+  });
+
+  test('cache key handles missing lastJudgeResult gracefully', async () => {
+    await expect(askAssistant({ ...baseInput, lastJudgeResult: undefined })).resolves.not.toThrow();
+    expect(mockGetFromCache).toHaveBeenCalled();
+  });
+
+  // ── Successful Gemini call ─────────────────────────────────────────────────
+
+  test('returns parsed response on successful Gemini call', async () => {
+    const result = await askAssistant(baseInput);
+    expect(result).toEqual(mockParsedReply);
+  });
+
+  test('calls getGeminiModel with correct model name', async () => {
+    await askAssistant(baseInput);
+    expect(mockGetGeminiModel).toHaveBeenCalledWith(expect.objectContaining({ modelName: 'gemini-2.5-flash' }));
+  });
+
+  test('calls getGeminiModel with temperature 0.5', async () => {
+    await askAssistant(baseInput);
+    expect(mockGetGeminiModel).toHaveBeenCalledWith(expect.objectContaining({ temperature: 0.5 }));
+  });
+
+  test('passes question to Gemini prompt context', async () => {
+    await askAssistant(baseInput);
+    // generateContent should be called once with a prompt containing the question
+    const [prompt] = mockGenerateContent.mock.calls[0];
+    expect(prompt).toContain(baseInput.question);
+  });
+
+  test('passes language to Gemini prompt context', async () => {
+    await askAssistant(baseInput);
+    const [prompt] = mockGenerateContent.mock.calls[0];
+    expect(prompt).toContain(baseInput.language);
+  });
+
+  test('passes problemTitle to Gemini prompt context', async () => {
+    await askAssistant(baseInput);
+    const [prompt] = mockGenerateContent.mock.calls[0];
+    expect(prompt).toContain(baseInput.problemTitle);
+  });
+
+  // ── JSON parse failure ─────────────────────────────────────────────────────
+
+  test('returns fallback response when Gemini JSON cannot be parsed', async () => {
+    mockSafeParseJSON.mockReturnValue(null);
+    const result = await askAssistant(baseInput);
+    expect(result).toBeDefined();
+    expect(result.mode).toBe('debug');
+    expect(result.reply).toBeDefined();
+  });
+
+  test('does not save to cache when JSON parse fails', async () => {
+    mockSafeParseJSON.mockReturnValue(null);
+    await askAssistant(baseInput);
+    expect(mockSaveToCache).not.toHaveBeenCalled();
+  });
+
+  // ── Gemini API failure ─────────────────────────────────────────────────────
+
+  test('returns fallback response when Gemini throws an error', async () => {
+    mockGenerateContent.mockRejectedValue(new Error('Network timeout'));
+    const result = await askAssistant(baseInput);
+    expect(result).toBeDefined();
+    expect(result.mode).toBe('debug');
+  });
+
+  test('does not throw when Gemini fails', async () => {
+    mockGenerateContent.mockRejectedValue(new Error('API unavailable'));
+    await expect(askAssistant(baseInput)).resolves.not.toThrow();
+  });
+
+  test('does not save to cache when Gemini call fails', async () => {
+    mockGenerateContent.mockRejectedValue(new Error('API unavailable'));
+    await askAssistant(baseInput);
+    expect(mockSaveToCache).not.toHaveBeenCalled();
+  });
+
+  // ── Optional context fields ────────────────────────────────────────────────
+
+  test('works without optional code field', async () => {
+    const result = await askAssistant({ ...baseInput, code: undefined });
+    expect(result).toEqual(mockParsedReply);
+  });
+
+  test('works without optional problemDescription field', async () => {
+    const result = await askAssistant({ ...baseInput, problemDescription: undefined });
+    expect(result).toEqual(mockParsedReply);
+  });
+
+  test('works without optional lastJudgeResult field', async () => {
+    const result = await askAssistant({ ...baseInput, lastJudgeResult: undefined });
+    expect(result).toEqual(mockParsedReply);
+  });
+});
diff --git a/crackcode/server/tests/aiErrorAgent.test.js b/crackcode/server/tests/aiErrorAgent.test.js
new file mode 100644
index 00000000..306bcc8e
--- /dev/null
+++ b/crackcode/server/tests/aiErrorAgent.test.js
@@ -0,0 +1,299 @@
+import { jest } from '@jest/globals';
+
+// ─── MOCK DEPENDENCIES BEFORE IMPORTS ─────────────────────────────────────────
+
+// Mock aiConfig — mutate properties directly so the imported reference stays live
+const mockAiConfig = {
+  enabled: true,
+  errorDiagnosisEnabled: true,
+  model: 'gemini-2.5-flash',
+  errorDiagnosisLimitPerMinute: 8,
+};
+jest.unstable_mockModule('../src/services/aiConfig.js', () => ({
+  aiConfig: mockAiConfig,
+}));
+
+// Mock rate limiter
+const mockCheckRateLimit = jest.fn();
+jest.unstable_mockModule('../src/services/aiRateLimiter.js', () => ({
+  checkRateLimit: mockCheckRateLimit,
+}));
+
+// Mock error cache
+const mockGenerateCacheKey = jest.fn();
+const mockGetFromCache = jest.fn();
+const mockSaveToCache = jest.fn();
+jest.unstable_mockModule('../src/services/errorCache.js', () => ({
+  generateCacheKey: mockGenerateCacheKey,
+  getFromCache: mockGetFromCache,
+  saveToCache: mockSaveToCache,
+}));
+
+// Mock prompt builder
+const mockBuildSystemInstruction = jest.fn();
+const mockBuildAnalysisPrompt = jest.fn();
+jest.unstable_mockModule('../src/services/promptBuilder.js', () => ({
+  buildSystemInstruction: mockBuildSystemInstruction,
+  buildAnalysisPrompt: mockBuildAnalysisPrompt,
+}));
+
+// Mock Gemini model
+const mockGenerateContent = jest.fn();
+const mockGetGeminiModel = jest.fn();
+jest.unstable_mockModule('../src/services/aiModel.js', () => ({
+  getGeminiModel: mockGetGeminiModel,
+}));
+
+// Mock JSON parser
+const mockSafeParseJSON = jest.fn();
+jest.unstable_mockModule('../src/services/aiJson.js', () => ({
+  safeParseJSON: mockSafeParseJSON,
+}));
+
+// ─── IMPORT AFTER MOCKS ────────────────────────────────────────────────────────
+
+const { classifyErrorType, analyseError } = await import('../src/services/aiErrorAgent.js');
+
+// ─── TEST DATA ─────────────────────────────────────────────────────────────────
+
+const baseInput = {
+  userId: 'user-123',
+  sessionId: 'session-abc',
+  code: 'def add(a, b):\n  return a + b',
+  language: 'python',
+  testResult: {
+    status: 'failed',
+    error: 'TypeError: unsupported operand type(s)',
+    expected: '5',
+    actual: 'None',
+  },
+  previousErrors: [],
+};
+
+const mockAnalysis = {
+  errorType: 'Type Error',
+  simplifiedMessage: 'Officer, there is a type mismatch.',
+  whatWentWrong: 'Python cannot add these types.',
+  affectedLines: [2],
+  actionableSteps: ['Step 1: Check types', 'Step 2: Fix it', 'Step 3: Re-run'],
+  conceptTitle: 'Type Errors',
+  conceptLesson: 'Types must match.',
+  severity: 'error',
+};
+
+// ─── classifyErrorType ─────────────────────────────────────────────────────────
+
+describe('classifyErrorType', () => {
+  const cases = [
+    ['SyntaxError: invalid syntax',    'Syntax Error'],
+    ['NameError: name x is not defined','Name Error'],
+    ['TypeError: unsupported operand',  'Type Error'],
+    ['IndexError: list index out of range', 'Index Error'],
+    ['ZeroDivisionError: division by zero', 'Zero Division Error'],
+    ['IndentationError: unexpected indent','Indentation Error'],
+    ['ValueError: invalid literal',     'Value Error'],
+    ['AttributeError: has no attribute','Attribute Error'],
+    ['ImportError: No module named',    'Import Error'],
+  ];
+
+  test.each(cases)('classifies "%s" as "%s"', (errorMsg, expected) => {
+    expect(classifyErrorType({ error: errorMsg })).toBe(expected);
+  });
+
+  test('classifies Compilation Error from message field', () => {
+    expect(classifyErrorType({ error: '', message: 'Compilation failed' })).toBe('Compilation Error');
+  });
+
+  test('classifies failed test with no error as Wrong Answer', () => {
+    expect(classifyErrorType({ status: 'failed', error: '' })).toBe('Wrong Answer');
+  });
+
+  test('defaults to Runtime Error for unrecognised error', () => {
+    expect(classifyErrorType({ error: 'some unknown error' })).toBe('Runtime Error');
+  });
+
+  test('handles missing error field gracefully', () => {
+    // No error, no matching status — falls through to Runtime Error
+    expect(classifyErrorType({})).toBe('Runtime Error');
+  });
+});
+
+// ─── analyseError ──────────────────────────────────────────────────────────────
+
+describe('analyseError', () => {
+  beforeEach(() => {
+    jest.clearAllMocks();
+
+    // Reset config to enabled defaults before each test
+    mockAiConfig.enabled = true;
+    mockAiConfig.errorDiagnosisEnabled = true;
+    mockAiConfig.model = 'gemini-2.5-flash';
+    mockAiConfig.errorDiagnosisLimitPerMinute = 8;
+
+    mockCheckRateLimit.mockReturnValue({ allowed: true, used: 1, remaining: 7, resetAt: Date.now() + 60000 });
+    mockGenerateCacheKey.mockReturnValue('cache-key-123');
+    mockGetFromCache.mockReturnValue(null);
+    mockSaveToCache.mockReturnValue(undefined);
+    mockBuildSystemInstruction.mockReturnValue('system instruction');
+    mockBuildAnalysisPrompt.mockReturnValue('analysis prompt');
+    mockGenerateContent.mockResolvedValue({ response: { text: () => JSON.stringify(mockAnalysis) } });
+    mockGetGeminiModel.mockReturnValue({ generateContent: mockGenerateContent });
+    mockSafeParseJSON.mockReturnValue(mockAnalysis);
+  });
+
+  // ── Feature flag checks ────────────────────────────────────────────────────
+
+  test('returns null when master AI switch is disabled', async () => {
+    mockAiConfig.enabled = false;
+    const result = await analyseError(baseInput);
+    expect(result).toBeNull();
+    expect(mockGenerateContent).not.toHaveBeenCalled();
+  });
+
+  test('returns null when errorDiagnosisEnabled is false', async () => {
+    mockAiConfig.errorDiagnosisEnabled = false;
+    const result = await analyseError(baseInput);
+    expect(result).toBeNull();
+    expect(mockGenerateContent).not.toHaveBeenCalled();
+  });
+
+  // ── Non-failed test ────────────────────────────────────────────────────────
+
+  test('returns null for passing test result', async () => {
+    const input = { ...baseInput, testResult: { status: 'passed' } };
+    const result = await analyseError(input);
+    expect(result).toBeNull();
+    expect(mockGenerateContent).not.toHaveBeenCalled();
+  });
+
+  test('returns null for test with status other than failed', async () => {
+    const input = { ...baseInput, testResult: { status: 'error' } };
+    const result = await analyseError(input);
+    expect(result).toBeNull();
+  });
+
+  // ── Rate limiting ──────────────────────────────────────────────────────────
+
+  test('returns rate limit object when limit is exceeded', async () => {
+    mockCheckRateLimit.mockReturnValue({ allowed: false, used: 9, remaining: 0, resetAt: Date.now() + 30000 });
+    const result = await analyseError(baseInput);
+    expect(result).not.toBeNull();
+    expect(result.rateLimited).toBe(true);
+    expect(result.errorType).toBe('Rate Limit');
+    expect(mockGenerateContent).not.toHaveBeenCalled();
+  });
+
+  test('rate limit response includes remaining and resetAt', async () => {
+    const resetAt = Date.now() + 30000;
+    mockCheckRateLimit.mockReturnValue({ allowed: false, used: 9, remaining: 0, resetAt });
+    const result = await analyseError(baseInput);
+    expect(result.remaining).toBe(0);
+    expect(result.resetAt).toBe(resetAt);
+  });
+
+  test('uses userId as rate limit key when provided', async () => {
+    await analyseError(baseInput);
+    expect(mockCheckRateLimit).toHaveBeenCalledWith(expect.objectContaining({ userKey: 'user-123' }));
+  });
+
+  test('falls back to sessionId when userId is absent', async () => {
+    const input = { ...baseInput, userId: undefined };
+    await analyseError(input);
+    expect(mockCheckRateLimit).toHaveBeenCalledWith(expect.objectContaining({ userKey: 'session-abc' }));
+  });
+
+  test('falls back to "anonymous" when both userId and sessionId are absent', async () => {
+    const input = { ...baseInput, userId: undefined, sessionId: undefined };
+    await analyseError(input);
+    expect(mockCheckRateLimit).toHaveBeenCalledWith(expect.objectContaining({ userKey: 'anonymous' }));
+  });
+
+  // ── Cache ──────────────────────────────────────────────────────────────────
+
+  test('returns cached result without calling Gemini', async () => {
+    mockGetFromCache.mockReturnValue(mockAnalysis);
+    const result = await analyseError(baseInput);
+    expect(result).toEqual(mockAnalysis);
+    expect(mockGenerateContent).not.toHaveBeenCalled();
+  });
+
+  test('saves result to cache after successful Gemini call', async () => {
+    const result = await analyseError(baseInput);
+    expect(result).toEqual(mockAnalysis);
+    expect(mockSaveToCache).toHaveBeenCalledWith('cache-key-123', mockAnalysis);
+  });
+
+  test('generateCacheKey is called with language, errorType, and errorText', async () => {
+    await analyseError(baseInput);
+    expect(mockGenerateCacheKey).toHaveBeenCalledWith(
+      'python',
+      expect.any(String),
+      expect.any(String)
+    );
+  });
+
+  // ── Successful Gemini call ─────────────────────────────────────────────────
+
+  test('returns parsed analysis on successful Gemini response', async () => {
+    const result = await analyseError(baseInput);
+    expect(result).toEqual(mockAnalysis);
+  });
+
+  test('calls getGeminiModel with correct model name', async () => {
+    await analyseError(baseInput);
+    expect(mockGetGeminiModel).toHaveBeenCalledWith(expect.objectContaining({ modelName: 'gemini-2.5-flash' }));
+  });
+
+  test('calls buildAnalysisPrompt with code, language, and errorType', async () => {
+    await analyseError(baseInput);
+    expect(mockBuildAnalysisPrompt).toHaveBeenCalledWith(expect.objectContaining({
+      code: baseInput.code,
+      language: baseInput.language,
+    }));
+  });
+
+  test('passes previousErrors to buildAnalysisPrompt', async () => {
+    const input = { ...baseInput, previousErrors: ['attempt 1', 'attempt 2'] };
+    await analyseError(input);
+    expect(mockBuildAnalysisPrompt).toHaveBeenCalledWith(expect.objectContaining({
+      previousErrors: ['attempt 1', 'attempt 2'],
+    }));
+  });
+
+  // ── Error text fallback ────────────────────────────────────────────────────
+
+  test('builds errorText from expected/actual when error field is missing', async () => {
+    const input = {
+      ...baseInput,
+      testResult: { status: 'failed', error: '', expected: '10', actual: '5' },
+    };
+    await analyseError(input);
+    expect(mockBuildAnalysisPrompt).toHaveBeenCalledWith(expect.objectContaining({
+      expected: '10',
+      actual: '5',
+    }));
+  });
+
+  // ── JSON parse failure ─────────────────────────────────────────────────────
+
+  test('returns null when Gemini response cannot be parsed as JSON', async () => {
+    mockSafeParseJSON.mockReturnValue(null);
+    const result = await analyseError(baseInput);
+    expect(result).toBeNull();
+    expect(mockSaveToCache).not.toHaveBeenCalled();
+  });
+
+  // ── Gemini API failure ─────────────────────────────────────────────────────
+
+  test('returns null and does not throw when Gemini throws an error', async () => {
+    mockGenerateContent.mockRejectedValue(new Error('Network error'));
+    const result = await analyseError(baseInput);
+    expect(result).toBeNull();
+  });
+
+  test('does not save to cache when Gemini call fails', async () => {
+    mockGenerateContent.mockRejectedValue(new Error('API down'));
+    await analyseError(baseInput);
+    expect(mockSaveToCache).not.toHaveBeenCalled();
+  });
+});
diff --git a/crackcode/server/tests/auth.test.js b/crackcode/server/tests/auth.test.js
new file mode 100644
index 00000000..675aae34
--- /dev/null
+++ b/crackcode/server/tests/auth.test.js
@@ -0,0 +1,635 @@
+import request from "supertest";
+import express from "express";
+import { jest } from "@jest/globals";
+
+
+// ─── SETUP MOCKS FIRST (Before any dynamic imports) ───────────────────────────
+
+// Mock bcryptjs
+const mockBcryptHash = jest.fn();
+const mockBcryptCompare = jest.fn();
+jest.unstable_mockModule("bcryptjs", () => ({
+  default: { hash: mockBcryptHash, compare: mockBcryptCompare },
+}));
+
+// Mock jsonwebtoken
+const mockJwtSign = jest.fn().mockReturnValue("mock-jwt-token");
+jest.unstable_mockModule("jsonwebtoken", () => ({
+  default: { sign: mockJwtSign },
+}));
+
+// Mock nodemailer transporter
+const mockSendMail = jest.fn();
+jest.unstable_mockModule("../src/modules/auth/nodemailer.config.js", () => ({
+  default: { sendMail: mockSendMail },
+}));
+
+// Mock User model
+const mockUserFindOne = jest.fn();
+const mockUserExists = jest.fn();
+const mockUserSave = jest.fn();
+let mockUserInstance = { save: mockUserSave };
+
+jest.unstable_mockModule("../src/modules/auth/User.model.js", () => {
+  const MockUser = jest.fn(() => mockUserInstance);
+  MockUser.findOne = mockUserFindOne;
+  MockUser.exists = mockUserExists;
+  return { default: MockUser };
+});
+
+// Mock PendingRegistration model
+const mockPendingFindOne = jest.fn();
+const mockPendingDeleteMany = jest.fn();
+const mockPendingFindByIdAndDelete = jest.fn();
+const mockPendingSave = jest.fn();
+let mockPendingInstance = { save: mockPendingSave };
+
+jest.unstable_mockModule("../src/modules/auth/PendingRegistration.model.js", () => {
+  const MockPending = jest.fn(() => mockPendingInstance);
+  MockPending.findOne = mockPendingFindOne;
+  MockPending.deleteMany = mockPendingDeleteMany;
+  MockPending.findByIdAndDelete = mockPendingFindByIdAndDelete;
+  return { default: MockPending };
+});
+
+// Mock session service
+const mockCreateSession = jest.fn();
+const mockInvalidateSession = jest.fn();
+const mockInvalidateAllUserSessions = jest.fn();
+jest.unstable_mockModule("../src/modules/session/session.service.js", () => ({
+  createSession: mockCreateSession,
+  invalidateSession: mockInvalidateSession,
+  invalidateAllUserSessions: mockInvalidateAllUserSessions,
+}));
+
+// Mock session controller
+const mockSetSessionCookies = jest.fn();
+const mockClearSessionCookies = jest.fn();
+jest.unstable_mockModule("../src/modules/session/session.controller.js", () => ({
+  setSessionCookies: mockSetSessionCookies,
+  clearSessionCookies: mockClearSessionCookies,
+}));
+
+// Mock Session model (imported by controller but not directly exercised in auth logic)
+jest.unstable_mockModule("../src/modules/session/Session.model.js", () => ({
+  default: {},
+}));
+
+// Mock badge service
+const mockCheckAndUnlockBadge = jest.fn();
+jest.unstable_mockModule("../src/modules/badges/badge.service.js", () => ({
+  checkAndUnlockBadge: mockCheckAndUnlockBadge,
+}));
+
+// Mock Auth Middleware — injects user, userId, and sessionId into req for protected routes
+jest.unstable_mockModule("../src/modules/auth/middleware.js", () => ({
+  default: (req, res, next) => {
+    req.user = {
+      _id: "testUserId",
+      id: "testUserId",
+      name: "Test User",
+      email: "test@example.com",
+      username: "testuser",
+      isAccountVerified: true,
+      accountStatus: "active",
+    };
+    req.userId = "testUserId";
+    req.sessionId = "testSessionId";
+    next();
+  },
+}));
+
+
+// ─── Import routes AFTER mocks are registered ─────────────────────────────────
+
+const { default: authRoutes } = await import("../src/modules/auth/routes.js");
+
+const app = express();
+app.use(express.json());
+app.use("/api/auth", authRoutes);
+
+
+// ─── Register API Tests ────────────────────────────────────────────────────────
+
+describe("Register API Tests", () => {
+  afterEach(() => {
+    jest.clearAllMocks();
+  });
+
+  it("should return 200 and tempId when registration succeeds", async () => {
+    mockUserFindOne.mockResolvedValue(null);
+    mockPendingDeleteMany.mockResolvedValue({});
+    mockBcryptHash.mockResolvedValue("hashed-password");
+    mockPendingInstance = { _id: "pendingId123", save: mockPendingSave };
+    mockPendingSave.mockResolvedValue({});
+    mockSendMail.mockResolvedValue({});
+
+    const res = await request(app).post("/api/auth/register").send({
+      name: "Alice",
+      email: "alice@example.com",
+      password: "password123",
+    });
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.tempId).toBeDefined();
+  });
+
+  it("should return 400 if name, email, or password is missing", async () => {
+    const res = await request(app).post("/api/auth/register").send({
+      email: "alice@example.com",
+      password: "password123",
+    });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+  });
+
+  it("should return 400 if passwords do not match", async () => {
+    const res = await request(app).post("/api/auth/register").send({
+      name: "Alice",
+      email: "alice@example.com",
+      password: "password123",
+      confirmPassword: "different",
+    });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+    expect(res.body.message).toMatch(/do not match/i);
+  });
+
+  it("should return 400 if terms and conditions are not accepted", async () => {
+    const res = await request(app).post("/api/auth/register").send({
+      name: "Alice",
+      email: "alice@example.com",
+      password: "password123",
+      acceptedTC: false,
+    });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+    expect(res.body.message).toMatch(/terms/i);
+  });
+
+  it("should return 400 if user with that email already exists", async () => {
+    mockUserFindOne.mockResolvedValue({ _id: "existingId", email: "alice@example.com" });
+
+    const res = await request(app).post("/api/auth/register").send({
+      name: "Alice",
+      email: "alice@example.com",
+      password: "password123",
+    });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+    expect(res.body.message).toMatch(/already exists/i);
+  });
+});
+
+
+// ─── Login API Tests ───────────────────────────────────────────────────────────
+
+describe("Login API Tests", () => {
+  afterEach(() => {
+    jest.clearAllMocks();
+  });
+
+  const mockUser = {
+    _id: "userId123",
+    name: "Alice",
+    email: "alice@example.com",
+    password: "hashed-password",
+    username: "alice",
+    isAccountVerified: true,
+    accountStatus: "active",
+  };
+
+  const mockSessionData = {
+    sessionId: "session123",
+    accessToken: "access-token",
+    refreshToken: "refresh-token",
+  };
+
+  it("should return 200 with user data and tokens on successful login", async () => {
+    mockUserFindOne.mockResolvedValue(mockUser);
+    mockBcryptCompare.mockResolvedValue(true);
+    mockCreateSession.mockResolvedValue(mockSessionData);
+    mockSetSessionCookies.mockImplementation(() => {});
+    mockJwtSign.mockReturnValue("legacy-token");
+
+    const res = await request(app).post("/api/auth/login").send({
+      email: "alice@example.com",
+      password: "password123",
+    });
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.user.email).toBe("alice@example.com");
+    expect(res.body.accessToken).toBe("access-token");
+    expect(mockCreateSession).toHaveBeenCalledWith("userId123", expect.any(Object));
+  });
+
+  it("should return 400 if email or password is missing", async () => {
+    const res = await request(app).post("/api/auth/login").send({ email: "alice@example.com" });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+  });
+
+  it("should return 400 if no user found with given email", async () => {
+    mockUserFindOne.mockResolvedValue(null);
+
+    const res = await request(app).post("/api/auth/login").send({
+      email: "nobody@example.com",
+      password: "password123",
+    });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+    expect(res.body.message).toMatch(/invalid email/i);
+  });
+
+  it("should return 400 if password does not match", async () => {
+    mockUserFindOne.mockResolvedValue(mockUser);
+    mockBcryptCompare.mockResolvedValue(false);
+
+    const res = await request(app).post("/api/auth/login").send({
+      email: "alice@example.com",
+      password: "wrongpassword",
+    });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+    expect(res.body.message).toMatch(/invalid password/i);
+  });
+
+  it("should return 403 if account is not verified", async () => {
+    mockUserFindOne.mockResolvedValue({ ...mockUser, isAccountVerified: false });
+    mockBcryptCompare.mockResolvedValue(true);
+
+    const res = await request(app).post("/api/auth/login").send({
+      email: "alice@example.com",
+      password: "password123",
+    });
+
+    expect(res.status).toBe(403);
+    expect(res.body.success).toBe(false);
+    expect(res.body.message).toMatch(/verify your email/i);
+  });
+
+  it("should return 403 if account status is not active", async () => {
+    mockUserFindOne.mockResolvedValue({ ...mockUser, isAccountVerified: true, accountStatus: "suspended" });
+    mockBcryptCompare.mockResolvedValue(true);
+
+    const res = await request(app).post("/api/auth/login").send({
+      email: "alice@example.com",
+      password: "password123",
+    });
+
+    expect(res.status).toBe(403);
+    expect(res.body.success).toBe(false);
+    expect(res.body.message).toMatch(/not active/i);
+  });
+});
+
+
+// ─── Logout API Tests ──────────────────────────────────────────────────────────
+
+describe("Logout API Tests", () => {
+  afterEach(() => {
+    jest.clearAllMocks();
+  });
+
+  it("should return 200 and invalidate the session on logout", async () => {
+    mockInvalidateSession.mockResolvedValue(true);
+    mockClearSessionCookies.mockImplementation(() => {});
+
+    const res = await request(app).post("/api/auth/logout");
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.message).toMatch(/logged out/i);
+    expect(mockInvalidateSession).toHaveBeenCalledWith("testSessionId");
+    expect(mockClearSessionCookies).toHaveBeenCalled();
+  });
+});
+
+
+// ─── Logout All Devices API Tests ─────────────────────────────────────────────
+
+describe("Logout All Devices API Tests", () => {
+  afterEach(() => {
+    jest.clearAllMocks();
+  });
+
+  it("should return 200 and terminate all sessions", async () => {
+    mockInvalidateAllUserSessions.mockResolvedValue({ deletedCount: 3 });
+    mockClearSessionCookies.mockImplementation(() => {});
+
+    const res = await request(app).post("/api/auth/logout-all");
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.sessionsTerminated).toBe(3);
+    expect(mockInvalidateAllUserSessions).toHaveBeenCalledWith("testUserId");
+  });
+});
+
+
+// ─── Send Verify OTP API Tests ────────────────────────────────────────────────
+
+describe("Send Verify OTP API Tests", () => {
+  afterEach(() => {
+    jest.clearAllMocks();
+  });
+
+  it("should return 200 and send OTP for a valid pending registration", async () => {
+    const pendingDoc = {
+      _id: "pendingId",
+      email: "alice@example.com",
+      otp: "123456",
+      otpExpireAt: new Date(),
+      save: jest.fn().mockResolvedValue({}),
+    };
+    mockPendingFindOne.mockResolvedValue(pendingDoc);
+    mockSendMail.mockResolvedValue({});
+
+    const res = await request(app)
+      .post("/api/auth/send-verify-otp")
+      .send({ email: "alice@example.com" });
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.message).toMatch(/otp sent/i);
+  });
+
+  it("should return 400 if email is missing", async () => {
+    const res = await request(app).post("/api/auth/send-verify-otp").send({});
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+  });
+
+  it("should return 404 if no pending registration exists for the email", async () => {
+    mockPendingFindOne.mockResolvedValue(null);
+
+    const res = await request(app)
+      .post("/api/auth/send-verify-otp")
+      .send({ email: "nobody@example.com" });
+
+    expect(res.status).toBe(404);
+    expect(res.body.success).toBe(false);
+  });
+});
+
+
+// ─── Verify Account API Tests ─────────────────────────────────────────────────
+
+describe("Verify Account API Tests", () => {
+  afterEach(() => {
+    jest.clearAllMocks();
+  });
+
+  const mockSessionData = {
+    sessionId: "session123",
+    accessToken: "access-token",
+    refreshToken: "refresh-token",
+  };
+
+  it("should return 200, create the user, and log them in after valid OTP", async () => {
+    const pendingDoc = {
+      _id: "pendingId",
+      name: "Alice",
+      email: "alice@example.com",
+      password: "hashed-password",
+      acceptedTC: true,
+      otpExpireAt: new Date(Date.now() + 60000), // valid for 1 min
+    };
+    mockPendingFindOne.mockResolvedValue(pendingDoc);
+    mockUserExists.mockResolvedValue(false);
+    mockUserInstance = {
+      _id: "newUserId",
+      name: "Alice",
+      email: "alice@example.com",
+      username: "alice",
+      isAccountVerified: true,
+      accountStatus: "active",
+      save: jest.fn().mockResolvedValue({}),
+    };
+    mockCheckAndUnlockBadge.mockResolvedValue({});
+    mockPendingFindByIdAndDelete.mockResolvedValue({});
+    mockCreateSession.mockResolvedValue(mockSessionData);
+    mockSetSessionCookies.mockImplementation(() => {});
+    mockJwtSign.mockReturnValue("legacy-token");
+
+    const res = await request(app)
+      .post("/api/auth/verify-account")
+      .send({ email: "alice@example.com", otp: "123456" });
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.user.email).toBe("alice@example.com");
+    expect(res.body.accessToken).toBe("access-token");
+    expect(mockCheckAndUnlockBadge).toHaveBeenCalledWith("newUserId", "welcome");
+    expect(mockPendingFindByIdAndDelete).toHaveBeenCalledWith("pendingId");
+  });
+
+  it("should return 400 if OTP is missing", async () => {
+    const res = await request(app)
+      .post("/api/auth/verify-account")
+      .send({ email: "alice@example.com" });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+    expect(res.body.message).toMatch(/missing otp/i);
+  });
+
+  it("should return 400 if OTP or email does not match a pending registration", async () => {
+    mockPendingFindOne.mockResolvedValue(null);
+
+    const res = await request(app)
+      .post("/api/auth/verify-account")
+      .send({ email: "alice@example.com", otp: "wrong-otp" });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+    expect(res.body.message).toMatch(/invalid otp/i);
+  });
+
+  it("should return 400 if the OTP has expired", async () => {
+    const expiredPending = {
+      _id: "pendingId",
+      email: "alice@example.com",
+      otpExpireAt: new Date(Date.now() - 60000), // expired 1 min ago
+    };
+    mockPendingFindOne.mockResolvedValue(expiredPending);
+
+    const res = await request(app)
+      .post("/api/auth/verify-account")
+      .send({ email: "alice@example.com", otp: "123456" });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+    expect(res.body.message).toMatch(/expired/i);
+  });
+});
+
+
+// ─── Is-Auth API Tests ────────────────────────────────────────────────────────
+
+describe("Is-Auth API Tests", () => {
+  afterEach(() => {
+    jest.clearAllMocks();
+  });
+
+  it("should return 200 with current user info when authenticated", async () => {
+    const res = await request(app).get("/api/auth/is-auth");
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.user.email).toBe("test@example.com");
+    expect(res.body.user.username).toBe("testuser");
+  });
+});
+
+
+// ─── Send Reset OTP API Tests ─────────────────────────────────────────────────
+
+describe("Send Reset OTP API Tests", () => {
+  afterEach(() => {
+    jest.clearAllMocks();
+  });
+
+  it("should return 200 and send a reset OTP for a registered email", async () => {
+    const userDoc = {
+      _id: "userId123",
+      email: "alice@example.com",
+      resetotp: "",
+      resetotpExpireAt: null,
+      save: jest.fn().mockResolvedValue({}),
+    };
+    mockUserFindOne.mockResolvedValue(userDoc);
+    mockSendMail.mockResolvedValue({});
+
+    const res = await request(app)
+      .post("/api/auth/send-reset-otp")
+      .send({ email: "alice@example.com" });
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.message).toMatch(/otp sent/i);
+  });
+
+  it("should return 400 if email is missing", async () => {
+    const res = await request(app).post("/api/auth/send-reset-otp").send({});
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+  });
+
+  it("should return 404 if no user exists with the given email", async () => {
+    mockUserFindOne.mockResolvedValue(null);
+
+    const res = await request(app)
+      .post("/api/auth/send-reset-otp")
+      .send({ email: "nobody@example.com" });
+
+    expect(res.status).toBe(404);
+    expect(res.body.success).toBe(false);
+  });
+});
+
+
+// ─── Reset Password API Tests ─────────────────────────────────────────────────
+
+describe("Reset Password API Tests", () => {
+  afterEach(() => {
+    jest.clearAllMocks();
+  });
+
+  it("should return 200 and reset the password with a valid OTP", async () => {
+    const userDoc = {
+      _id: "userId123",
+      email: "alice@example.com",
+      resetotp: "654321",
+      resetotpExpireAt: new Date(Date.now() + 60000), // valid for 1 min
+      save: jest.fn().mockResolvedValue({}),
+    };
+    mockUserFindOne.mockResolvedValue(userDoc);
+    mockBcryptHash.mockResolvedValue("new-hashed-password");
+
+    const res = await request(app).post("/api/auth/reset-password").send({
+      email: "alice@example.com",
+      otp: "654321",
+      newPassword: "newSecurePass!",
+    });
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.message).toMatch(/reset successfully/i);
+    expect(mockBcryptHash).toHaveBeenCalledWith("newSecurePass!", 10);
+  });
+
+  it("should return 400 if email, OTP, or newPassword is missing", async () => {
+    const res = await request(app).post("/api/auth/reset-password").send({
+      email: "alice@example.com",
+      otp: "654321",
+    });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+  });
+
+  it("should return 404 if user is not found", async () => {
+    mockUserFindOne.mockResolvedValue(null);
+
+    const res = await request(app).post("/api/auth/reset-password").send({
+      email: "nobody@example.com",
+      otp: "654321",
+      newPassword: "newPass",
+    });
+
+    expect(res.status).toBe(404);
+    expect(res.body.success).toBe(false);
+  });
+
+  it("should return 400 if the OTP does not match", async () => {
+    mockUserFindOne.mockResolvedValue({
+      _id: "userId123",
+      email: "alice@example.com",
+      resetotp: "correct-otp",
+      resetotpExpireAt: new Date(Date.now() + 60000),
+      save: jest.fn(),
+    });
+
+    const res = await request(app).post("/api/auth/reset-password").send({
+      email: "alice@example.com",
+      otp: "wrong-otp",
+      newPassword: "newPass",
+    });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+    expect(res.body.message).toMatch(/invalid otp/i);
+  });
+
+  it("should return 400 if the OTP has expired", async () => {
+    mockUserFindOne.mockResolvedValue({
+      _id: "userId123",
+      email: "alice@example.com",
+      resetotp: "654321",
+      resetotpExpireAt: new Date(Date.now() - 60000), // expired 1 min ago
+      save: jest.fn(),
+    });
+
+    const res = await request(app).post("/api/auth/reset-password").send({
+      email: "alice@example.com",
+      otp: "654321",
+      newPassword: "newPass",
+    });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+    expect(res.body.message).toMatch(/expired/i);
+  });
+});
diff --git a/crackcode/server/tests/careerMap.test.js b/crackcode/server/tests/careerMap.test.js
new file mode 100644
index 00000000..b358b9f3
--- /dev/null
+++ b/crackcode/server/tests/careerMap.test.js
@@ -0,0 +1,533 @@
+import request from "supertest";
+import express from "express";
+import { jest } from "@jest/globals";
+
+
+// SETUP MOCKS FIRST (Before any dynamic imports)
+
+// Mock Auth Middleware — sets both req.user.id and req.userId to cover both controllers
+jest.unstable_mockModule("../src/modules/auth/middleware.js", () => ({
+  default: (req, res, next) => {
+    req.user = { id: "testUserId" };
+    req.userId = "testUserId";
+    next();
+  },
+}));
+
+// Mock Question Service
+const mockGetQuestionsByDifficulty = jest.fn();
+const mockGetQuestionById = jest.fn();
+const mockGetQuestionsByCategoryAndDifficulty = jest.fn();
+const mockGetAllQuestions = jest.fn();
+const mockCountQuestionsByCategories = jest.fn();
+
+jest.unstable_mockModule("../src/modules/Career Map/questions/question.service.js", () => ({
+  getQuestionsByDifficulty: mockGetQuestionsByDifficulty,
+  getQuestionById: mockGetQuestionById,
+  getQuestionsByCategoryAndDifficulty: mockGetQuestionsByCategoryAndDifficulty,
+  getAllQuestions: mockGetAllQuestions,
+  countQuestionsByCategories: mockCountQuestionsByCategories,
+}));
+
+// Mock User model
+const mockUserFindByIdAndUpdate = jest.fn();
+jest.unstable_mockModule("../src/modules/auth/User.model.js", () => ({
+  default: { findByIdAndUpdate: mockUserFindByIdAndUpdate },
+}));
+
+// Mock UserProgress model
+const mockUserProgressFindOne = jest.fn();
+const mockUserProgressFindOneAndUpdate = jest.fn();
+jest.unstable_mockModule("../src/modules/learn/UserProgress.model.js", () => ({
+  default: {
+    findOne: mockUserProgressFindOne,
+    findOneAndUpdate: mockUserProgressFindOneAndUpdate,
+  },
+}));
+
+// Mock Badge service
+const mockCheckAndUnlockMultipleBadges = jest.fn();
+jest.unstable_mockModule("../src/modules/badges/badge.service.js", () => ({
+  checkAndUnlockMultipleBadges: mockCheckAndUnlockMultipleBadges,
+}));
+
+// Mock Progress model
+const mockProgressFindOne = jest.fn();
+const mockProgressFind = jest.fn();
+const mockProgressCreate = jest.fn();
+jest.unstable_mockModule("../src/modules/Career Map/progress/progress.model.js", () => ({
+  default: {
+    findOne: mockProgressFindOne,
+    find: mockProgressFind,
+    create: mockProgressCreate,
+  },
+}));
+
+// Mock Progress service
+const mockUpdateChapterProgress = jest.fn();
+const mockResetProgressService = jest.fn();
+jest.unstable_mockModule("../src/modules/Career Map/progress/progress.service.js", () => ({
+  updateChapterProgress: mockUpdateChapterProgress,
+  getProgressByUserId: jest.fn(),
+  resetProgress: mockResetProgressService,
+}));
+
+
+// Import routes AFTER mocks are registered
+const { default: questionRoutes } = await import("../src/modules/Career Map/questions/question.routes.js");
+const { default: progressRoutes } = await import("../src/modules/Career Map/progress/progress.routes.js");
+
+const app = express();
+app.use(express.json());
+app.use("/api/questions", questionRoutes);
+app.use("/api/progress", progressRoutes);
+
+
+// ─── Questions API Tests ──────────────────────────────────────────────────────
+
+describe("Questions API Tests", () => {
+  afterEach(() => {
+    jest.clearAllMocks();
+  });
+
+  // GET /api/questions/careers
+
+  it("should return all available career paths", async () => {
+    const res = await request(app).get("/api/questions/careers");
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.data).toHaveLength(3);
+    expect(res.body.data.map((c) => c.id)).toEqual(
+      expect.arrayContaining(["MLEngineer", "DataScientist", "SoftwareEngineer"])
+    );
+  });
+
+  // GET /api/questions/count
+
+  it("should return question count for valid career and categories", async () => {
+    mockCountQuestionsByCategories.mockResolvedValue(20);
+
+    const res = await request(app)
+      .get("/api/questions/count")
+      .query({ career: "MLEngineer", categories: "Neural Networks,Deep Learning" });
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.count).toBe(20);
+  });
+
+  it("should return 400 if career or categories are missing from count", async () => {
+    const res = await request(app)
+      .get("/api/questions/count")
+      .query({ career: "MLEngineer" });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+  });
+
+  it("should return 400 for invalid career in count", async () => {
+    const res = await request(app)
+      .get("/api/questions/count")
+      .query({ career: "InvalidCareer", categories: "Algorithms" });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+  });
+
+  // GET /api/questions
+
+  it("should return questions for valid career and difficulty", async () => {
+    const mockQuestions = [
+      { _id: "q1", question: "What is a tensor?", difficulty: "Easy" },
+      { _id: "q2", question: "Explain gradient descent.", difficulty: "Easy" },
+    ];
+    mockGetQuestionsByDifficulty.mockResolvedValue(mockQuestions);
+
+    const res = await request(app)
+      .get("/api/questions")
+      .query({ career: "MLEngineer", difficulty: "Easy" });
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.count).toBe(2);
+    expect(res.body.data).toHaveLength(2);
+  });
+
+  it("should return questions filtered by category when provided", async () => {
+    const mockQuestions = [
+      { _id: "q3", question: "What is backpropagation?", category: "Neural Networks", difficulty: "Medium" },
+    ];
+    mockGetQuestionsByCategoryAndDifficulty.mockResolvedValue(mockQuestions);
+
+    const res = await request(app)
+      .get("/api/questions")
+      .query({ career: "DataScientist", difficulty: "Medium", category: "Neural Networks" });
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(mockGetQuestionsByCategoryAndDifficulty).toHaveBeenCalledWith(
+      "DataScientist",
+      "Neural Networks",
+      "Medium"
+    );
+  });
+
+  it("should return 400 if career is missing from questions", async () => {
+    const res = await request(app)
+      .get("/api/questions")
+      .query({ difficulty: "Easy" });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+  });
+
+  it("should return 400 if difficulty is missing from questions", async () => {
+    const res = await request(app)
+      .get("/api/questions")
+      .query({ career: "MLEngineer" });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+  });
+
+  it("should return 400 for invalid career in questions", async () => {
+    const res = await request(app)
+      .get("/api/questions")
+      .query({ career: "FakeCareer", difficulty: "Easy" });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+  });
+
+  // GET /api/questions/:id
+
+  it("should return a single question by id", async () => {
+    const mockQuestion = {
+      _id: "q1",
+      question: "What is a neural network?",
+      difficulty: "Easy",
+      type: "mcq",
+      correctAnswer: "A",
+    };
+    mockGetQuestionById.mockResolvedValue(mockQuestion);
+
+    const res = await request(app)
+      .get("/api/questions/q1")
+      .query({ career: "MLEngineer" });
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.data._id).toBe("q1");
+  });
+
+  it("should return 404 if question is not found", async () => {
+    mockGetQuestionById.mockResolvedValue(null);
+
+    const res = await request(app)
+      .get("/api/questions/nonexistent")
+      .query({ career: "MLEngineer" });
+
+    expect(res.status).toBe(404);
+    expect(res.body.success).toBe(false);
+  });
+
+  it("should return 400 if career is missing when getting single question", async () => {
+    const res = await request(app).get("/api/questions/q1");
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+  });
+
+  it("should return 400 for invalid career when getting single question", async () => {
+    const res = await request(app)
+      .get("/api/questions/q1")
+      .query({ career: "InvalidCareer" });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+  });
+
+  // POST /api/questions/submit
+
+  it("should return correct: true for a correct MCQ answer (first completion)", async () => {
+    mockGetQuestionById.mockResolvedValue({
+      _id: "q1",
+      correctAnswer: "gradient descent",
+      type: "mcq",
+    });
+    mockUserProgressFindOne.mockResolvedValue(null); // first time
+    mockUserProgressFindOneAndUpdate.mockResolvedValue({});
+    mockUserFindByIdAndUpdate.mockResolvedValue({ casesSolved: 1 });
+    mockCheckAndUnlockMultipleBadges.mockResolvedValue(["beginner"]);
+
+    const res = await request(app)
+      .post("/api/questions/submit")
+      .send({ career: "MLEngineer", questionId: "q1", answer: "gradient descent" });
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.correct).toBe(true);
+    expect(res.body.badgesUnlocked).toContain("beginner");
+  });
+
+  it("should return correct: false and reveal the correct answer for a wrong answer", async () => {
+    mockGetQuestionById.mockResolvedValue({
+      _id: "q1",
+      correctAnswer: "gradient descent",
+      type: "mcq",
+    });
+
+    const res = await request(app)
+      .post("/api/questions/submit")
+      .send({ career: "MLEngineer", questionId: "q1", answer: "wrong answer" });
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.correct).toBe(false);
+    expect(res.body.correctAnswer).toBe("gradient descent");
+  });
+
+  it("should accept fill_blank answers that match any valid alternative", async () => {
+    mockGetQuestionById.mockResolvedValue({
+      _id: "q2",
+      correctAnswer: "relu,ReLU,Rectified Linear Unit",
+      type: "fill_blank",
+    });
+    mockUserProgressFindOne.mockResolvedValue({ status: "completed" }); // already completed
+
+    const res = await request(app)
+      .post("/api/questions/submit")
+      .send({ career: "DataScientist", questionId: "q2", answer: "ReLU" });
+
+    expect(res.status).toBe(200);
+    expect(res.body.correct).toBe(true);
+  });
+
+  it("should return 400 if required fields are missing from submit", async () => {
+    const res = await request(app)
+      .post("/api/questions/submit")
+      .send({ career: "MLEngineer" }); // missing questionId and answer
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+  });
+
+  it("should return 400 for invalid career in submit", async () => {
+    const res = await request(app)
+      .post("/api/questions/submit")
+      .send({ career: "FakeCareer", questionId: "q1", answer: "test" });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+  });
+
+  it("should return 404 if submitted question does not exist", async () => {
+    mockGetQuestionById.mockResolvedValue(null);
+
+    const res = await request(app)
+      .post("/api/questions/submit")
+      .send({ career: "MLEngineer", questionId: "nonexistent", answer: "test" });
+
+    expect(res.status).toBe(404);
+    expect(res.body.success).toBe(false);
+  });
+});
+
+
+// ─── Progress API Tests ───────────────────────────────────────────────────────
+
+describe("Progress API Tests", () => {
+  afterEach(() => {
+    jest.clearAllMocks();
+  });
+
+  const mockProgressDoc = {
+    _id: "prog1",
+    userId: "testUserId",
+    career: "MLEngineer",
+    chapters: [],
+    easyScore: 0,
+    mediumScore: 0,
+    hardScore: 0,
+    easyCompleted: false,
+    mediumCompleted: false,
+    hardCompleted: false,
+  };
+
+  // GET /api/progress
+
+  it("should return existing progress for a valid career", async () => {
+    mockProgressFindOne.mockResolvedValue(mockProgressDoc);
+
+    const res = await request(app)
+      .get("/api/progress")
+      .query({ career: "MLEngineer" });
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.data.career).toBe("MLEngineer");
+  });
+
+  it("should create and return new progress if none exists", async () => {
+    mockProgressFindOne.mockResolvedValue(null);
+    mockProgressCreate.mockResolvedValue(mockProgressDoc);
+
+    const res = await request(app)
+      .get("/api/progress")
+      .query({ career: "MLEngineer" });
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(mockProgressCreate).toHaveBeenCalledWith({
+      userId: "testUserId",
+      career: "MLEngineer",
+      chapters: [],
+    });
+  });
+
+  it("should return 400 if career is missing", async () => {
+    const res = await request(app).get("/api/progress");
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+  });
+
+  it("should return 400 for invalid career", async () => {
+    const res = await request(app)
+      .get("/api/progress")
+      .query({ career: "FakeCareer" });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+  });
+
+  // GET /api/progress/all
+
+  it("should return all career progress for the authenticated user", async () => {
+    const allProgress = [
+      { ...mockProgressDoc, career: "MLEngineer" },
+      { ...mockProgressDoc, career: "DataScientist" },
+    ];
+    mockProgressFind.mockResolvedValue(allProgress);
+
+    const res = await request(app).get("/api/progress/all");
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.data).toHaveLength(2);
+  });
+
+  it("should return empty array if user has no progress records", async () => {
+    mockProgressFind.mockResolvedValue([]);
+
+    const res = await request(app).get("/api/progress/all");
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.data).toHaveLength(0);
+  });
+
+  // POST /api/progress/update
+
+  it("should update chapter progress successfully", async () => {
+    const updatedProgress = {
+      ...mockProgressDoc,
+      chapters: [{ chapterId: "ch1", easyScore: 4, mediumScore: 3, hardScore: 2, passed: true }],
+      easyScore: 4,
+    };
+    mockUpdateChapterProgress.mockResolvedValue(updatedProgress);
+
+    const res = await request(app)
+      .post("/api/progress/update")
+      .send({
+        career: "MLEngineer",
+        chapterId: "ch1",
+        easyScore: 4,
+        mediumScore: 3,
+        hardScore: 2,
+        passed: true,
+      });
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(mockUpdateChapterProgress).toHaveBeenCalledWith(
+      "testUserId",
+      "MLEngineer",
+      "ch1",
+      4,
+      3,
+      2,
+      true
+    );
+  });
+
+  it("should default missing scores to 0 and passed to false", async () => {
+    mockUpdateChapterProgress.mockResolvedValue(mockProgressDoc);
+
+    const res = await request(app)
+      .post("/api/progress/update")
+      .send({ career: "SoftwareEngineer", chapterId: "ch2" });
+
+    expect(res.status).toBe(200);
+    expect(mockUpdateChapterProgress).toHaveBeenCalledWith(
+      "testUserId",
+      "SoftwareEngineer",
+      "ch2",
+      0,
+      0,
+      0,
+      false
+    );
+  });
+
+  it("should return 400 if career or chapterId is missing from update", async () => {
+    const res = await request(app)
+      .post("/api/progress/update")
+      .send({ career: "MLEngineer" }); // missing chapterId
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+  });
+
+  it("should return 400 for invalid career in update", async () => {
+    const res = await request(app)
+      .post("/api/progress/update")
+      .send({ career: "FakeCareer", chapterId: "ch1" });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+  });
+
+  // POST /api/progress/reset
+
+  it("should reset progress for a valid career", async () => {
+    const resetDoc = { ...mockProgressDoc, chapters: [], easyScore: 0 };
+    mockResetProgressService.mockResolvedValue(resetDoc);
+
+    const res = await request(app)
+      .post("/api/progress/reset")
+      .send({ career: "MLEngineer" });
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.message).toMatch(/reset/i);
+    expect(mockResetProgressService).toHaveBeenCalledWith("testUserId", "MLEngineer");
+  });
+
+  it("should return 400 if career is missing from reset", async () => {
+    const res = await request(app).post("/api/progress/reset").send({});
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+  });
+
+  it("should return 400 for invalid career in reset", async () => {
+    const res = await request(app)
+      .post("/api/progress/reset")
+      .send({ career: "InvalidCareer" });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+  });
+});
diff --git a/crackcode/server/tests/codeEditor.test.js b/crackcode/server/tests/codeEditor.test.js
new file mode 100644
index 00000000..e44de90e
--- /dev/null
+++ b/crackcode/server/tests/codeEditor.test.js
@@ -0,0 +1,467 @@
+import request from "supertest";
+import express from "express";
+import { jest } from "@jest/globals";
+
+
+// ─── SETUP MOCKS FIRST (Before any dynamic imports) ───────────────────────────
+
+// Mock codeEditor service
+const mockRunTestCases = jest.fn();
+const mockExecuteCode = jest.fn();
+const mockGetLanguageId = jest.fn();
+jest.unstable_mockModule("../src/modules/codeEditor/codeEditor.service.js", () => ({
+  runTestCases: mockRunTestCases,
+  executeCode: mockExecuteCode,
+  getLanguageId: mockGetLanguageId,
+}));
+
+// Mock submit service
+const mockSubmitSolutionService = jest.fn();
+jest.unstable_mockModule("../src/modules/codeEditor/codeEditor.submit.service.js", () => ({
+  submitSolutionService: mockSubmitSolutionService,
+}));
+
+// Mock AI error agent
+const mockAnalyseError = jest.fn();
+const mockClassifyErrorType = jest.fn();
+jest.unstable_mockModule("../src/services/aiErrorAgent.js", () => ({
+  analyseError: mockAnalyseError,
+  classifyErrorType: mockClassifyErrorType,
+}));
+
+// Mock error cache
+const mockClearCache = jest.fn();
+const mockGetCacheStats = jest.fn();
+jest.unstable_mockModule("../src/services/errorCache.js", () => ({
+  clearCache: mockClearCache,
+  getCacheStats: mockGetCacheStats,
+}));
+
+// Mock reward service
+const mockAwardReward = jest.fn();
+jest.unstable_mockModule("../src/modules/rewards/reward.service.js", () => ({
+  awardReward: mockAwardReward,
+}));
+
+// Mock progress service
+const mockMarkQuestionSolved = jest.fn();
+const mockIncrementAttempt = jest.fn();
+jest.unstable_mockModule("../src/modules/progress/progress.service.js", () => ({
+  markQuestionSolved: mockMarkQuestionSolved,
+  incrementAttempt: mockIncrementAttempt,
+}));
+
+// Mock Question model
+const mockQuestionFindOne = jest.fn();
+jest.unstable_mockModule("../src/modules/learn/Question.model.js", () => ({
+  default: { findOne: mockQuestionFindOne },
+}));
+
+// Mock LearnUserProgress model
+const mockLearnProgressFindOneAndUpdate = jest.fn();
+jest.unstable_mockModule("../src/modules/learn/UserProgress.model.js", () => ({
+  default: { findOneAndUpdate: mockLearnProgressFindOneAndUpdate },
+}));
+
+// Mock session middleware — injects user into req for protected routes
+jest.unstable_mockModule("../src/modules/session/session.middleware.js", () => ({
+  sessionAuth: (req, res, next) => {
+    req.user = { _id: "testUserId" };
+    req.userId = "testUserId";
+    req.sessionId = "testSessionId";
+    next();
+  },
+}));
+
+
+// ─── Import routes AFTER mocks are registered ─────────────────────────────────
+
+const { default: codeEditorRoutes } = await import("../src/modules/codeEditor/routes.js");
+
+const app = express();
+app.use(express.json());
+app.use("/api/codeEditor", codeEditorRoutes);
+
+
+// ─── GET /languages Tests ──────────────────────────────────────────────────────
+
+describe("GET /api/codeEditor/languages", () => {
+  it("should return 200 with all supported languages", async () => {
+    const res = await request(app).get("/api/codeEditor/languages");
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.data).toHaveProperty("python");
+    expect(res.body.data).toHaveProperty("javascript");
+    expect(res.body.data).toHaveProperty("cpp");
+    expect(res.body.data).toHaveProperty("java");
+    expect(res.body.data).toHaveProperty("c");
+    expect(res.body.data.python).toEqual({ id: 71, name: "Python 3" });
+    expect(res.body.data.javascript).toEqual({ id: 63, name: "JavaScript (Node.js)" });
+  });
+});
+
+
+// ─── POST /run Tests ───────────────────────────────────────────────────────────
+
+describe("POST /api/codeEditor/run", () => {
+  afterEach(() => {
+    jest.clearAllMocks();
+  });
+
+  it("should return 200 with execution output on success", async () => {
+    mockExecuteCode.mockResolvedValue({ success: true, output: "Hello World\n", time: "0.1", memory: 1024 });
+
+    const res = await request(app).post("/api/codeEditor/run").send({
+      sourceCode: 'print("Hello World")',
+      language: "python",
+      input: "",
+    });
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.data.output).toBe("Hello World\n");
+    expect(mockExecuteCode).toHaveBeenCalledWith('print("Hello World")', "python", "");
+  });
+
+  it("should default input to empty string if not provided", async () => {
+    mockExecuteCode.mockResolvedValue({ success: true, output: "42\n" });
+
+    await request(app).post("/api/codeEditor/run").send({
+      sourceCode: "print(42)",
+      language: "python",
+    });
+
+    expect(mockExecuteCode).toHaveBeenCalledWith("print(42)", "python", "");
+  });
+
+  it("should return 400 if sourceCode is missing", async () => {
+    const res = await request(app).post("/api/codeEditor/run").send({
+      language: "python",
+    });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+    expect(res.body.message).toMatch(/source code is required/i);
+  });
+
+  it("should return 400 if language is missing", async () => {
+    const res = await request(app).post("/api/codeEditor/run").send({
+      sourceCode: "print(1)",
+    });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+    expect(res.body.message).toMatch(/language is required/i);
+  });
+
+  it("should return 500 if executeCode throws an error", async () => {
+    mockExecuteCode.mockRejectedValue(new Error("Judge0 unavailable"));
+
+    const res = await request(app).post("/api/codeEditor/run").send({
+      sourceCode: "print(1)",
+      language: "python",
+    });
+
+    expect(res.status).toBe(500);
+    expect(res.body.success).toBe(false);
+    expect(res.body.message).toMatch(/Judge0 unavailable/i);
+  });
+});
+
+
+// ─── POST /execute Tests ───────────────────────────────────────────────────────
+
+describe("POST /api/codeEditor/execute", () => {
+  afterEach(() => {
+    jest.clearAllMocks();
+  });
+
+  const validPayload = {
+    sourceCode: "def solve(a, b): return a + b",
+    language: "python",
+    testCases: [
+      { input: { a: 1, b: 2 }, expectedOutput: "3" },
+    ],
+    problemId: "py_fundamentals_001",
+    difficulty: "Easy",
+    sourceArea: "learn_page",
+  };
+
+  it("should return 200 with test results when all tests pass", async () => {
+    const passedResults = [{ status: "passed", output: "3", time: "0.1", memory: 1024 }];
+    mockRunTestCases.mockResolvedValue(passedResults);
+    mockQuestionFindOne.mockResolvedValue({ _id: "questionMongoId" });
+    mockIncrementAttempt.mockResolvedValue({});
+    mockMarkQuestionSolved.mockResolvedValue({});
+    mockAwardReward.mockResolvedValue({
+      xpAwarded: 10,
+      tokensAwarded: 6,
+      alreadyRewarded: false,
+      isFirstSolve: true,
+      badgesUnlocked: ["beginner"],
+      updatedUserStats: { totalXP: 10 },
+    });
+    mockLearnProgressFindOneAndUpdate.mockResolvedValue({});
+
+    const res = await request(app).post("/api/codeEditor/execute").send(validPayload);
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.data.summary.allPassed).toBe(true);
+    expect(res.body.data.summary.passed).toBe(1);
+    expect(res.body.data.summary.failed).toBe(0);
+    expect(res.body.data.reward.xpAwarded).toBe(10);
+    expect(res.body.data.reward.badgesUnlocked).toContain("beginner");
+  });
+
+  it("should return 200 and include AI analysis when a test fails", async () => {
+    const failedResults = [
+      {
+        status: "failed",
+        output: "4",
+        expectedOutput: "3",
+        stderr: "",
+      },
+    ];
+    mockRunTestCases.mockResolvedValue(failedResults);
+    mockClassifyErrorType.mockReturnValue("WrongAnswer");
+    mockAnalyseError.mockResolvedValue({ hint: "Check your addition logic." });
+    mockQuestionFindOne.mockResolvedValue({ _id: "questionMongoId" });
+    mockIncrementAttempt.mockResolvedValue({});
+
+    const res = await request(app).post("/api/codeEditor/execute").send(validPayload);
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.data.summary.allPassed).toBe(false);
+    expect(res.body.data.summary.failed).toBe(1);
+    expect(res.body.data.results[0].errorType).toBe("WrongAnswer");
+    expect(res.body.data.results[0].aiAnalysis.hint).toMatch(/Check your addition/i);
+    expect(mockMarkQuestionSolved).not.toHaveBeenCalled();
+    expect(mockAwardReward).not.toHaveBeenCalled();
+  });
+
+  it("should return 400 if sourceCode is missing", async () => {
+    const { sourceCode: _, ...payload } = validPayload;
+
+    const res = await request(app).post("/api/codeEditor/execute").send(payload);
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+    expect(res.body.message).toMatch(/source code is required/i);
+  });
+
+  it("should return 400 if language is missing", async () => {
+    const { language: _, ...payload } = validPayload;
+
+    const res = await request(app).post("/api/codeEditor/execute").send(payload);
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+    expect(res.body.message).toMatch(/language is required/i);
+  });
+
+  it("should return 400 if testCases is missing or empty", async () => {
+    const res = await request(app).post("/api/codeEditor/execute").send({
+      ...validPayload,
+      testCases: [],
+    });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+    expect(res.body.message).toMatch(/test cases/i);
+  });
+
+  it("should return 400 if testCases is not an array", async () => {
+    const res = await request(app).post("/api/codeEditor/execute").send({
+      ...validPayload,
+      testCases: "not-an-array",
+    });
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+  });
+
+  it("should skip reward system if problemId is not provided", async () => {
+    const passedResults = [{ status: "passed", output: "3" }];
+    mockRunTestCases.mockResolvedValue(passedResults);
+
+    const { problemId: _, ...payload } = validPayload;
+    const res = await request(app).post("/api/codeEditor/execute").send(payload);
+
+    expect(res.status).toBe(200);
+    expect(mockIncrementAttempt).not.toHaveBeenCalled();
+    expect(mockAwardReward).not.toHaveBeenCalled();
+    expect(res.body.data.reward).toBeUndefined();
+  });
+
+  it("should fall back to original problemId if Question.findOne returns null", async () => {
+    const passedResults = [{ status: "passed", output: "3" }];
+    mockRunTestCases.mockResolvedValue(passedResults);
+    mockQuestionFindOne.mockResolvedValue(null);
+    mockIncrementAttempt.mockResolvedValue({});
+    mockMarkQuestionSolved.mockResolvedValue({});
+    mockAwardReward.mockResolvedValue({
+      xpAwarded: 10,
+      tokensAwarded: 6,
+      alreadyRewarded: false,
+      isFirstSolve: true,
+      badgesUnlocked: [],
+    });
+    mockLearnProgressFindOneAndUpdate.mockResolvedValue({});
+
+    const res = await request(app).post("/api/codeEditor/execute").send(validPayload);
+
+    expect(res.status).toBe(200);
+    expect(mockIncrementAttempt).toHaveBeenCalledWith(
+      "testUserId",
+      "py_fundamentals_001",
+      "coding"
+    );
+  });
+
+  it("should not fail if reward system throws an internal error", async () => {
+    const passedResults = [{ status: "passed", output: "3" }];
+    mockRunTestCases.mockResolvedValue(passedResults);
+    mockQuestionFindOne.mockResolvedValue({ _id: "questionMongoId" });
+    mockIncrementAttempt.mockRejectedValue(new Error("DB error"));
+
+    const res = await request(app).post("/api/codeEditor/execute").send(validPayload);
+
+    // Should still return 200 — reward errors should not break test execution
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+  });
+
+  it("should return 500 if runTestCases throws an error", async () => {
+    mockRunTestCases.mockRejectedValue(new Error("Judge0 connection failed"));
+
+    const res = await request(app).post("/api/codeEditor/execute").send(validPayload);
+
+    expect(res.status).toBe(500);
+    expect(res.body.success).toBe(false);
+    expect(res.body.message).toMatch(/Judge0 connection failed/i);
+  });
+});
+
+
+// ─── POST /submit Tests ────────────────────────────────────────────────────────
+
+describe("POST /api/codeEditor/submit", () => {
+  afterEach(() => {
+    jest.clearAllMocks();
+  });
+
+  const validPayload = {
+    questionId: "py_fundamentals_001",
+    code: "def solve(a, b): return a + b",
+    languageId: 71,
+  };
+
+  it("should return 200 with result data on successful submission", async () => {
+    mockSubmitSolutionService.mockResolvedValue({
+      passed: true,
+      testsPassed: 3,
+      testsTotal: 3,
+      isFirstCompletion: true,
+      xpAwarded: 10,
+      tokensAwarded: 6,
+      badgesUnlocked: ["beginner"],
+    });
+
+    const res = await request(app).post("/api/codeEditor/submit").send(validPayload);
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.data.passed).toBe(true);
+    expect(res.body.data.isFirstCompletion).toBe(true);
+    expect(mockSubmitSolutionService).toHaveBeenCalledWith({
+      userId: "testUserId",
+      questionId: "py_fundamentals_001",
+      code: "def solve(a, b): return a + b",
+      languageId: 71,
+    });
+  });
+
+  it("should return 400 if questionId is missing", async () => {
+    const { questionId: _, ...payload } = validPayload;
+
+    const res = await request(app).post("/api/codeEditor/submit").send(payload);
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+    expect(res.body.message).toMatch(/questionId is required/i);
+  });
+
+  it("should return 400 if code is missing", async () => {
+    const { code: _, ...payload } = validPayload;
+
+    const res = await request(app).post("/api/codeEditor/submit").send(payload);
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+    expect(res.body.message).toMatch(/code is required/i);
+  });
+
+  it("should return 400 if languageId is missing", async () => {
+    const { languageId: _, ...payload } = validPayload;
+
+    const res = await request(app).post("/api/codeEditor/submit").send(payload);
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+    expect(res.body.message).toMatch(/languageId is required/i);
+  });
+
+  it("should return 500 if submitSolutionService throws an error", async () => {
+    mockSubmitSolutionService.mockRejectedValue(new Error("Question not found"));
+
+    const res = await request(app).post("/api/codeEditor/submit").send(validPayload);
+
+    expect(res.status).toBe(500);
+    expect(res.body.success).toBe(false);
+    expect(res.body.message).toMatch(/Question not found/i);
+  });
+
+  it("should return 200 with failed result when tests do not all pass", async () => {
+    mockSubmitSolutionService.mockResolvedValue({
+      passed: false,
+      testsPassed: 1,
+      testsTotal: 3,
+      isFirstCompletion: false,
+    });
+
+    const res = await request(app).post("/api/codeEditor/submit").send(validPayload);
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.data.passed).toBe(false);
+    expect(res.body.data.isFirstCompletion).toBe(false);
+  });
+});
+
+
+// ─── POST /clear-ai-cache Tests ────────────────────────────────────────────────
+
+describe("POST /api/codeEditor/clear-ai-cache", () => {
+  afterEach(() => {
+    jest.clearAllMocks();
+  });
+
+  it("should return 200 with cache stats before and after clearing", async () => {
+    mockGetCacheStats
+      .mockReturnValueOnce({ size: 5, hits: 10 })
+      .mockReturnValueOnce({ size: 0, hits: 0 });
+    mockClearCache.mockImplementation(() => {});
+
+    const res = await request(app).post("/api/codeEditor/clear-ai-cache");
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.message).toMatch(/cache cleared/i);
+    expect(res.body.before).toEqual({ size: 5, hits: 10 });
+    expect(res.body.after).toEqual({ size: 0, hits: 0 });
+    expect(mockClearCache).toHaveBeenCalledTimes(1);
+  });
+});
diff --git a/crackcode/server/tests/shop.test.js b/crackcode/server/tests/shop.test.js
new file mode 100644
index 00000000..7e7af2e0
--- /dev/null
+++ b/crackcode/server/tests/shop.test.js
@@ -0,0 +1,168 @@
+import request from "supertest";
+import express from "express";
+import { jest } from "@jest/globals";
+
+// .env variables for testing
+process.env.STRIPE_SECRET_KEY = "test_stripe_secret";
+process.env.STRIPE_WEBHOOK_SECRET = "test_webhook_secret";
+
+
+// SETUP MOCKS FIRST (Before any dynamic imports)
+
+// Mock Auth Middleware
+jest.unstable_mockModule("../src/modules/auth/middleware.js", () => ({
+  default: (req, res, next) => {
+    req.user = { _id: "testUserId" };
+    next();
+  },
+}));
+
+// Create mock functions for the Shop Service
+const mockGetShopItems = jest.fn();
+const mockPurchaseItemWithTokens = jest.fn();
+const mockGetMyInventory = jest.fn();
+const mockCreateCheckoutSession = jest.fn();
+const mockFinalizePaidPurchase = jest.fn();
+
+// Mock the Shop Service
+jest.unstable_mockModule("../src/modules/shop/Shop.service.js", () => ({
+  getShopItems: mockGetShopItems,
+  purchaseItemWithTokens: mockPurchaseItemWithTokens,
+  getMyInventory: mockGetMyInventory,
+  createCheckoutSession: mockCreateCheckoutSession,
+  finalizePaidPurchase: mockFinalizePaidPurchase,
+}));
+
+// Create a mock for Stripe's constructEvent
+const mockConstructEvent = jest.fn();
+
+// Mock the Stripe library globally for ESM
+jest.unstable_mockModule("stripe", () => ({
+  default: jest.fn().mockImplementation(() => ({
+    webhooks: {
+      constructEvent: mockConstructEvent,
+    },
+  })),
+}));
+
+
+// Import the router AFTER mocks are registered
+const { default: shopRoutes } = await import("../src/routes/Shop.routes.js");
+
+const app = express();
+app.use(express.json()); 
+app.use("/api/shop", shopRoutes);
+
+
+// 3. TEST SUITES
+
+
+describe("Shop API Tests", () => {
+  afterEach(() => {
+    jest.clearAllMocks();
+  });
+
+  // GET /items
+ 
+  it("should return shop items", async () => {
+    mockGetShopItems.mockResolvedValue([
+      { name: "Item 1" },
+      { name: "Item 2" },
+    ]);
+
+    const res = await request(app).get("/api/shop/items");
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.items.length).toBe(2);
+  });
+
+  // POST /purchase
+
+  it("should purchase item successfully", async () => {
+    mockPurchaseItemWithTokens.mockResolvedValue({
+      success: true,
+      remainingTokens: 100,
+    });
+
+    const res = await request(app)
+      .post("/api/shop/purchase")
+      .send({ itemId: "item123" });
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+  });
+
+  it("should fail if itemId is missing", async () => {
+    // Assuming your controller handles the missing ID and returns 400
+    const res = await request(app)
+      .post("/api/shop/purchase")
+      .send({});
+
+    expect(res.status).toBe(400);
+  });
+
+  // GET /inventory
+
+  it("should return user inventory", async () => {
+    mockGetMyInventory.mockResolvedValue([
+      { itemId: "item1" },
+    ]);
+
+    const res = await request(app).get("/api/shop/inventory");
+
+    expect(res.status).toBe(200);
+    expect(res.body.items.length).toBe(1);
+  });
+
+  // POST /checkout
+
+  it("should create checkout session", async () => {
+    mockCreateCheckoutSession.mockResolvedValue({
+      success: true,
+      url: "http://checkout",
+      sessionId: "sess_123",
+    });
+
+    const res = await request(app)
+      .post("/api/shop/checkout")
+      .send({ itemId: "item123" });
+
+    expect(res.status).toBe(200);
+    expect(res.body.url).toBe("http://checkout");
+  });
+
+
+  // Stripe Webhook
+
+  it("should handle webhook successfully", async () => {
+    // Setup the mocked Stripe response
+    mockConstructEvent.mockReturnValue({
+      type: "checkout.session.completed",
+      data: {
+        object: {
+          id: "sess_123",
+          metadata: {
+            userId: "user1",
+            itemId: "item1",
+          },
+        },
+      },
+    });
+
+    mockFinalizePaidPurchase.mockResolvedValue({
+      success: true,
+    });
+
+    const res = await request(app)
+      .post("/api/shop/webhook")
+      .set("stripe-signature", "test-signature")
+      .send({});
+
+    expect(res.status).toBe(200);
+    
+    // Verify that the construct event was actually called
+    expect(mockConstructEvent).toHaveBeenCalled();
+    expect(mockFinalizePaidPurchase).toHaveBeenCalled();
+  });
+});
\ No newline at end of file