Fix Next.js 15 compatibility and TypeScript errors

- Update API route handlers to use async params for Next.js 15 compatibility
- Fix MUI DataGrid deprecated props (pageSize -> initialState.pagination)
- Replace Material-UI Grid components with Box for better compatibility
- Fix admin authentication system with proper request parameters
- Update permission constants to match available AdminPermission enum values
- Add missing properties to Page interface for type safety
- Update .gitignore to exclude venv/, import logs, and large data directories
- Optimize Next.js config to reduce memory usage during builds

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.gitignore

@@ -67,4 +67,16 @@ logs
 
 # Temporary files
 *.tmp
-*.temp
+*.temp
+
+# Large data directories (excluded from builds)
+bibles/
+scripts/
+
+# Python virtual environment
+venv/
+env/
+.venv/
+
+# Import logs
+import_log.txt