Update OpenAI API key and enhance app functionality: Replace the OpenAI API key in the .env file for improved access. Refactor app.py to include error handling for missing API keys and implement dark mode functionality with session management. Update README.md to reflect the use of Tailwind CSS via CDN and document the Content Security Policy (CSP) adjustments. Enhance mindmap data loading with a new API endpoint for refreshing data, ensuring better user experience during database connection issues. Update styles and templates for improved UI consistency and responsiveness.

utils/__init__.py

@@ -7,14 +7,14 @@ This package contains various utilities for database management,
 user management, and server administration.
 """
 
-from .db_fix import fix_database_schema
-from .db_rebuild import rebuild_database
-from .db_test import test_database_connection, test_models, print_database_stats, run_all_tests
-from .user_manager import list_users, create_user, reset_password, delete_user, create_admin_user
-from .server import run_development_server
+# Import utilities that don't depend on app.py first
+from .db_check import check_db_connection, initialize_db_if_needed
 
+# Define the list of all available utilities
 __all__ = [
     # Database utilities
+    'check_db_connection',
+    'initialize_db_if_needed',
     'fix_database_schema',
     'rebuild_database',
     'test_database_connection',
@@ -31,4 +31,11 @@ __all__ = [
     
     # Server management
     'run_development_server',
-] 
+]
+
+# Import remaining modules that might depend on app
+from .db_fix import fix_database_schema
+from .db_rebuild import rebuild_database
+from .db_test import test_database_connection, test_models, print_database_stats, run_all_tests
+from .user_manager import list_users, create_user, reset_password, delete_user, create_admin_user
+from .server import run_development_server