Problem

SubAgentFlowDialog panels were not properly isolated from the main workflow canvas:

Issue 1: Panel Display Synchronization

When opening PropertyOverlay or RefinementChatPanel in SubAgentFlowDialog, they would also open on the main canvas due to shared global state.

Issue 2: Chat History Synchronization

AI editing chat history in SubAgentFlowDialog was synced with main workflow. Opening AI editing in SubAgentFlow would overwrite the main workflow's conversation history in the global refinement store.

Issue 3: Send Button Not Working

In SubAgentFlowDialog, clicking the send button in AI editing did nothing unless the main workflow's AI editing chat had been opened first. This was because activeWorkflow was null for manually created workflows.

Solution

Panel State Isolation

• Added local state (localSelectedNodeId, isLocalPropertyOverlayOpen, isLocalRefinementPanelOpen) to SubAgentFlowDialog
• Passed overrideSelectedNodeId prop to PropertyOverlay for local control

Chat History Isolation (Controlled Component Pattern)

• Created RefinementChatState type for shared state interface
• Created useLocalRefinementChatState hook for local chat state management (~230 lines)
• Refactored RefinementChatPanel to be a controlled component accepting chatState props
• SubAgentFlowDialog manages its own chat state locally via the hook
• App.tsx builds mainChatState from the existing refinement store

activeWorkflow Initialization

• Added ensureActiveWorkflow() function to workflow-store
• Called in handleToggleAiEditMode to ensure activeWorkflow exists before AI editing
• Creates workflow from canvas state if null (handles manually created workflows)

Changes

New Files

• src/webview/src/types/refinement-chat-state.ts - Shared state type definition
• src/webview/src/hooks/useLocalRefinementChatState.ts - Local chat state hook

Modified Files

• SubAgentFlowDialog.tsx - Local panel state + hook usage + ensureActiveWorkflow call
• PropertyOverlay.tsx - Added overrideSelectedNodeId prop support
• RefinementChatPanel.tsx - Controlled component with chatState prop
• MessageList.tsx / MessageInput.tsx - Controlled mode support
• App.tsx - Build mainChatState from refinement store
• workflow-store.ts - Added ensureActiveWorkflow function

Impact

• SubAgentFlowDialog panels now operate independently from main canvas
• AI editing chat history is isolated per context (main vs SubAgentFlow)
• Manually created workflows can now use AI editing in SubAgentFlow
• No breaking changes to existing functionality

Testing

• Manual E2E testing completed
• Code quality checks passed (format, lint, build)

🤖 Generated with Claude Code