electron: external data dir, packaged path fix, footer responsive, test stabilization

- DB + uploads stored outside app bundle (survives updates)
- Router uses DOCUMENT_ROOT instead of __DIR__ (fixes AppImage paths)
- Footer count shifts right below 1250px, min-width 1150px
- Gallery opens gracefully on fetch errors
- Stabilized gallery, export, and find/replace tests with poll loops

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

config.php

@@ -1,10 +1,12 @@
 <?php
 
 define('APP_NAME', 'hyprcrd');
-define('APP_VERSION', '1.0.2');
+define('APP_VERSION', '1.1.0');
 
 // Database path — writable directory, outside webroot
-define('DB_PATH', __DIR__ . '/data/hyprcrd.db');
+// DB_PATH / UPLOAD_DIR can be pre-defined by the Electron router for app isolation
+if (!defined('DB_PATH'))    define('DB_PATH', __DIR__ . '/data/hyprcrd.db');
+if (!defined('UPLOAD_DIR')) define('UPLOAD_DIR', __DIR__ . '/public/uploads');
 
 // Base URL auto-detection (works in Docker and hosted environments)
 $protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') ? 'https' : 'http';