Add merge preparation summary documentation

MERGE_PREPARATION_SUMMARY.md

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+# Branch Merge Preparation Summary
+
+## ✅ Completed Tasks
+
+### 1. Build Issues Fixed
+- **SSR Issues**: Fixed server-side rendering issues with Leaflet map components
+- **useSearchParams**: Added Suspense boundaries to all pages using useSearchParams
+- **Dynamic Imports**: Implemented proper dynamic imports for map components
+- **Build Success**: Project now builds successfully without errors
+
+### 2. Code Quality Improvements
+- **README Updated**: Comprehensive documentation reflecting current project state
+- **Project Structure**: Updated project structure documentation
+- **API Documentation**: Added complete API endpoint documentation
+- **Clean Build**: All pages compile and build correctly
+
+### 3. Debug Pages Management
+- **Temporary Relocation**: Moved debug/test pages to `debug-disabled/` folder
+- **Build Optimization**: Removed non-production pages from build process
+- **Development Tools**: Preserved debug functionality for future development
+
+### 4. Authentication & Authorization
+- **Auth Pages Fixed**: All authentication pages now build correctly
+- **Suspense Boundaries**: Proper error boundaries for auth components
+- **Session Management**: Maintained existing auth functionality
+
+## 🔍 Current State
+
+### Build Status
+- ✅ **npm run build**: Successful
+- ✅ **34 pages**: All pages compile
+- ✅ **Static Generation**: Working correctly
+- ⚠️ **ESLint Warning**: Parser serialization issue (non-blocking)
+
+### Branch Status
+- **Branch**: `auth2`
+- **Status**: Ready for merge to main
+- **Commit**: `faeb1ca` - "Prepare branch for merge to main"
+- **Files Changed**: 13 files modified/moved
+
+## 🚀 Next Steps for Merge
+
+### 1. Pre-merge Checklist
+- [x] All build errors resolved
+- [x] Documentation updated
+- [x] Non-production code moved
+- [x] Changes committed
+- [ ] Final testing (recommended)
+- [ ] Merge to main branch
+
+### 2. Post-merge Tasks
+- [ ] Re-enable debug pages if needed (move back from `debug-disabled/`)
+- [ ] Fix ESLint parser configuration
+- [ ] Add integration tests
+- [ ] Deploy to production
+
+### 3. Optional Improvements
+- [ ] Fix ESLint configuration for better linting
+- [ ] Add more comprehensive error handling
+- [ ] Optimize bundle size
+- [ ] Add more unit tests
+
+## 📝 Files Modified
+
+### Core Changes
+- `README.md` - Updated comprehensive documentation
+- `src/app/auth/error/page.js` - Added Suspense boundary
+- `src/app/auth/signin/page.js` - Added Suspense boundary
+- `src/app/projects/[id]/page.js` - Fixed dynamic import
+- `src/app/projects/map/page.js` - Added Suspense boundary
+- `src/components/ui/ClientProjectMap.js` - New client component wrapper
+
+### Debug Pages (Temporarily Moved)
+- `debug-disabled/debug-polish-orthophoto/` - Polish orthophoto debug
+- `debug-disabled/test-polish-orthophoto/` - Polish orthophoto test
+- `debug-disabled/test-polish-map/` - Polish map test
+- `debug-disabled/test-improved-wmts/` - WMTS test
+- `debug-disabled/comprehensive-polish-map/` - Comprehensive map test
+
+## 🎯 Recommendation
+
+**The branch is now ready for merge to main.** All critical build issues have been resolved, and the project builds successfully. The debug pages have been temporarily moved to prevent build issues while preserving their functionality for future development.
+
+To proceed with the merge:
+1. Switch to main branch: `git checkout main`
+2. Merge auth2 branch: `git merge auth2`
+3. Push to origin: `git push origin main`
+4. Deploy if needed
+
+The project is now in a stable state with comprehensive authentication, project management, and mapping functionality.