d3b119c7fe
- Add ?action=health_check PHP endpoint (early-exit, before rate-limiter) Checks: PHP version, required extensions, data/ writability, SQLite DB connection + table integrity, .env file, Gemini AI key, Bring! token - Display animated checklist in splash screen with per-item icons (ok/warn/error); critical failures block app launch with clear error message and Retry button; optional warnings shown but don't block - New JS: _runStartupCheck(), _startupRetry(); called first in _initApp() - New HTML elements in #app-preloader: #preloader-checks, #preloader-error-msg, #preloader-retry-btn (hidden until startup check completes) - New CSS: .preloader-checks, .preloader-check-row, .preloader-error-msg, .preloader-retry-btn with state colors (ok=green, warn=amber, error=red) - Translations: startup.* keys (10 per language) in IT, EN, DE, FR, ES - Asset version bump: v=20260520a