fix: resolve image display issues after refactor

- Fix upload folder path to be relative to Flask app static folder
- Update app initialization to use proper static folder structure
- Change default development port to 5001 to avoid AirPlay conflicts
- Images now display correctly in both public and admin views

The refactored app now properly serves uploaded images from the
correct static file location.

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

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

main.py

@@ -15,4 +15,5 @@ app = create_app()
 if __name__ == "__main__":
     # Development server configuration
     debug_mode = os.environ.get('FLASK_ENV') == 'development'
-    app.run(debug=debug_mode, host='0.0.0.0', port=5000)
+    port = int(os.environ.get('PORT', 5001))  # Use port 5001 to avoid AirPlay conflict
+    app.run(debug=debug_mode, host='0.0.0.0', port=port)