mysql-connector-python 9.x restructured its package hierarchy. PyInstaller
fails to auto-discover submodules (aio, plugins, locales, etc.).
Updated DatabaseApp.spec to use collect_all('mysql.connector') which
walks the full package tree and bundles all required files.
Rebuilt DatabaseApp.exe (30.9 MB).
- Save/load DB host from config.json (works both in dev and built .exe)
- All DB operations moved to background threads to prevent UI blocking
- Connection timeout set to 5s to avoid long hangs on unreachable host
- Added Test Connection button to Settings popup
- Added red Exit button fixed to bottom-right corner of main screen
- Updated DatabaseApp.spec with full Kivy deps (sdl2, glew, angle) and hidden imports
- PyInstaller-aware base path using sys.frozen for config.json persistence
