Problem

Current Behavior

1. User opens VSCode without a workspace/folder
2. User tries to launch Claude Code Workflow Studio
3. ❌ Technical error message displayed: Failed to initialize File Service: No workspace folder is open

Expected Behavior

1. User opens VSCode without a workspace/folder
2. User tries to launch Claude Code Workflow Studio
3. ✅ User-friendly message displayed: フォルダまたはワークスペースを開いてから実行してください。

Solution

Add i18n support for the workspace error message to display a clear, actionable message to users.

Changes

File: src/extension/commands/open-editor.ts

• Import translate function from i18n-service
• Check if error is "No workspace folder is open" and display localized message

File: src/extension/i18n/translation-keys.ts

• Add error.noWorkspaceOpen key

Files: src/extension/i18n/translations/*.ts

• Add translations for 5 languages:
  • English: "Please open a folder or workspace first."
  • Japanese: "フォルダまたはワークスペースを開いてから実行してください。"
  • Korean: "폴더 또는 워크스페이스를 먼저 열어주세요."
  • Simplified Chinese: "请先打开文件夹或工作区。"
  • Traditional Chinese: "請先開啟資料夾或工作區。"

Impact

• Improved UX for users who launch the extension without a workspace
• No breaking changes
• Consistent with existing i18n patterns

Testing

• Manual E2E testing completed (launch extension without workspace)
• Code quality checks passed (npm run format && npm run lint && npm run check)
• Build successful (npm run build)

🤖 Generated with Claude Code