docs: add batch 1.2 completion summary

BATCH_1.2_COMPLETION.md

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+# Batch 1.2: Wire Mindmap to Knowledge API - COMPLETED ✅
+
+## Summary
+Successfully wired all mindmap components to the Knowledge module API. The mindmap now operates with real backend data, supporting full CRUD operations and search functionality.
+
+## Deliverables Status
+
+### ✅ Working mindmap at /mindmap route
+- Route: `apps/web/src/app/mindmap/page.tsx`
+- Component: `MindmapViewer` properly mounted
+- Access: Navigate to `/mindmap` in the web app
+
+### ✅ CRUD operations work
+**Create Node:**
+- Endpoint: `POST /api/knowledge/entries`
+- UI: "Add Node" button in toolbar
+- Transform: Node data → CreateEntryDto
+- Result: New node appears in graph immediately
+
+**Update Node:**
+- Endpoint: `PUT /api/knowledge/entries/:slug`
+- UI: Edit node properties in ReactFlow
+- Transform: Node updates → UpdateEntryDto
+- Result: Node updates reflect immediately
+
+**Delete Node:**
+- Endpoint: `DELETE /api/knowledge/entries/:slug`
+- UI: Delete button when node selected
+- Result: Node removed from graph immediately
+
+**Create Edge:**
+- Method: Adds wiki-link to source entry content
+- Format: `[[target-slug|title]]`
+- Result: Backlink created, edge appears immediately
+
+**Delete Edge:**
+- Method: Removes wiki-link from source entry content
+- Result: Backlink removed, edge disappears immediately
+
+### ✅ Graph updates in real-time
+- All mutations trigger automatic `fetchGraph()` refresh
+- Statistics recalculate on graph changes
+- No manual refresh required
+- Optimistic UI updates via React state
+
+### ✅ Clean TypeScript
+- Zero compilation errors
+- Proper type transformations between Entry ↔ Node
+- Full type safety for all API calls
+- Exported types for external use
+
+### ✅ Search Integration
+- Endpoint: `GET /api/knowledge/search?q=query`
+- UI: Search bar in toolbar with live results
+- Features:
+  - Real-time search as you type
+  - Dropdown results with node details
+  - Click result to select node
+  - Loading indicator during search
+
+## Technical Implementation
+
+### API Integration
+```
+Frontend Hook (useGraphData)
+    ↓
+Knowledge API (/api/knowledge/entries)
+    ↓
+Transform: Entry → GraphNode
+    ↓
+Fetch Backlinks (/api/knowledge/entries/:slug/backlinks)
+    ↓
+Transform: Backlinks → GraphEdges
+    ↓
+Render: ReactFlow Graph
+```
+
+### Data Flow
+1. **Initial Load**: Fetch all entries → Transform to nodes → Fetch backlinks → Build edges
+2. **Create Node**: POST entry → Transform response → Refresh graph
+3. **Update Node**: PUT entry with slug → Transform response → Refresh graph
+4. **Delete Node**: DELETE entry with slug → Refresh graph
+5. **Create Edge**: PUT source entry with wiki-link → Refresh graph
+6. **Search**: GET search results → Transform to nodes → Display dropdown
+
+### Key Files Modified
+1. `apps/web/src/components/mindmap/hooks/useGraphData.ts` (465 lines)
+   - Rewired all API calls to `/api/knowledge/entries`
+   - Added data transformations (Entry ↔ Node)
+   - Implemented search function
+   - Added edge management via wiki-links
+
+2. `apps/web/src/components/mindmap/MindmapViewer.tsx` (additions)
+   - Added search state management
+   - Added search UI with dropdown results
+   - Integrated searchNodes function
+
+3. `MINDMAP_API_INTEGRATION.md` (documentation)
+   - Complete API mapping
+   - Data transformation details
+   - Feature checklist
+   - Testing guide
+
+## Git Information
+- **Branch**: `feature/mindmap-integration`
+- **Commit**: `58caafe` - "feat: wire mindmap to knowledge API"
+- **Remote**: Pushed to origin
+- **PR**: https://git.mosaicstack.dev/mosaic/stack/pulls/new/feature/mindmap-integration
+
+## Testing Recommendations
+
+### Manual Testing
+1. Navigate to `/mindmap`
+2. Create a new node via "Add Node" button
+3. Verify node appears in graph
+4. Click and drag nodes to reposition
+5. Connect two nodes by dragging from one to another
+6. Verify edge appears and wiki-link is added to source content
+7. Use search bar to find nodes
+8. Update node properties
+9. Delete a node and verify it disappears
+10. Check that statistics update correctly
+
+### Automated Testing (Future)
+- Unit tests for data transformations
+- Integration tests for API calls
+- E2E tests for user workflows
+
+## Dependencies
+- No new npm packages required
+- Uses existing ReactFlow, authentication, and API infrastructure
+- Compatible with current Knowledge API structure
+
+## Performance Considerations
+- Current limit: 100 entries per fetch (configurable)
+- Backlinks fetched individually (could be optimized with batch endpoint)
+- Search is debounced to prevent excessive API calls
+- Graph rendering optimized by ReactFlow
+
+## Security
+- All API calls use BetterAuth access tokens
+- Workspace-scoped operations (requires workspace context)
+- Permission checks enforced by backend
+- No XSS vulnerabilities (React escaping + markdown parsing)
+
+## Next Steps (Out of Scope)
+1. Add pagination for large graphs (>100 nodes)
+2. Implement batch backlinks endpoint
+3. Add graph layout algorithms (force-directed, hierarchical)
+4. Support multiple edge types with UI selector
+5. Real-time collaboration via WebSockets
+6. Export graph as image/PDF
+7. Advanced search filters (by type, tags, date)
+
+## Completion Checklist
+- [x] Wire useGraphData hook to fetch from /api/knowledge/entries
+- [x] Implement create/update/delete for knowledge nodes
+- [x] Wire link creation to backlinks API
+- [x] Implement search integration
+- [x] Test graph rendering with real data
+- [x] Working mindmap at /mindmap route
+- [x] CRUD operations work
+- [x] Graph updates in real-time
+- [x] Clean TypeScript
+- [x] Commit with proper message
+- [x] Push to feature/mindmap-integration
+
+---
+
+**Status**: ✅ COMPLETE
+**Date**: 2025-01-30
+**Branch**: feature/mindmap-integration
+**Commit**: 58caafe