Backend APIs Fixed

🎯 Issue

Backend APIs were failing due to:

1. backend-api: Nx project graph conflict from frontend library
2. backend-ai-api: Missing type annotation in Mongoose schema

✅ Fixes Applied

Fix 1: Removed Frontend Library Conflict (Session 12.6)

Problem:

NX Failed to process project graph.
The following projects are defined in multiple locations:
- libs-widgets/widget-builder:
  - libs/libs-widgets/editor-widgets-v2
  - libs/libs-widgets/widget-builder

Root Cause: Created editor-widgets-v2 by copying project.json without updating name field.

Solution: Removed libs/libs-widgets/editor-widgets-v2 completely.

Principle Enforced:

Backend builds should NEVER fail due to frontend library issues. Complete decoupling required.

Fix 2: ChatSession Schema Type (Session 12.7)

Problem:

Error: Cannot determine a type for the "ChatSession.context" field

File: apis/backend-ai-api/src/app/sessions/sessions.schema.ts:58

Before:

@Prop()
context?: string;

After:

@Prop({ type: String })
context?: string;

Why: Mongoose needs explicit type for optional union/ambiguous types.

✅ Build Status

backend-api

✅ webpack compiled successfully
✅ Running on port 3000

backend-ai-api

✅ webpack compiled successfully  
✅ Running on port 3001

🎯 Core Properties System Ready

Backend Complete:

• ✅ core-properties.service.ts
• ✅ core-properties.controller.ts
• ✅ core-properties.module.ts
• ✅ 7 property template categories designed
• ✅ API endpoints ready
• ✅ Seeding system ready

API Endpoints Available:

GET  /api/core/templates                - List all
GET  /api/core/templates/:id            - Get one
GET  /api/core/templates/batch?ids=...  - Get multiple
GET  /api/core/templates/widget/:type   - For widget type
GET  /api/core/templates/search         - Search
POST /api/core/templates/seed           - Seed templates

📊 MongoDB Recommendation

Your existing core_property_templates (15 documents):

• ✅ KEEP THEM - Well structured
• ✅ Enhance with AI metadata
• ✅ Add missing ones (layout-container, behavior-children-support)
• ✅ Ensure consistency

Don't delete and recreate - merge and enhance!

🚀 Ready for Frontend

With backend clean and working, we can now:

1. Create property-manager UI (uses these templates)
2. Create editor-widgets-v2 (properly, as separate library)
3. Build adapter system
4. Fix container nesting with universal wrapper

Status: ✅ Both backends healthy, core properties ready
Session: 12.8
Next: Frontend v2 widget system