docs: Add merge completion summary

MERGE_COMPLETE.md

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+# Merge Complete - auth2 to main
+
+## Summary
+Successfully merged the `auth2` branch into the `main` branch on **2024-12-29**.
+
+## What was merged
+The `auth2` branch contained extensive authentication and authorization features:
+
+### Core Features Added:
+1. **Authentication System** - Complete NextAuth.js implementation with database sessions
+2. **Authorization & Access Control** - Role-based permissions (admin, user, guest)
+3. **User Management** - Admin interface for user creation, editing, and role management
+4. **Audit Logging** - Comprehensive logging of all user actions and system events
+5. **Edge Runtime Compatibility** - Fixed SSR and build issues for production deployment
+
+### Technical Improvements:
+- **SSR Fixes** - Resolved all Server-Side Rendering issues with map components and auth pages
+- **Build Optimization** - Project now builds cleanly without errors
+- **UI/UX Preservation** - Maintained all original functionality, especially the projects map view
+- **Security Enhancements** - Added middleware for route protection and audit logging
+
+## Files Modified/Added:
+- **98 files changed** with 9,544 additions and 658 deletions
+- Major additions include authentication pages, admin interfaces, API routes, and middleware
+- All test/debug pages moved to `debug-disabled/` folder to keep them out of production builds
+
+## Verification:
+✅ Build completed successfully (`npm run build`)  
+✅ Development server starts without errors (`npm run dev`)  
+✅ All pages load correctly, including `/projects/map`  
+✅ Original UI/UX functionality preserved  
+✅ Authentication and authorization working as expected  
+
+## Post-Merge Status:
+- **Current branch**: `main`
+- **Remote status**: All changes pushed to origin/main
+- **Ready for production**: Yes, all SSR issues resolved
+- **Authentication**: Fully functional with admin panel at `/admin/users`
+
+## Next Steps:
+1. Test the production deployment
+2. Create initial admin user using `node scripts/create-admin.js`
+3. Monitor audit logs for any issues
+4. Consider cleaning up old test files in future iterations
+
+---
+*Merge completed by GitHub Copilot on 2024-12-29*