feat: extract MediaController, wire into Dispatcher, delete media.php

config/config.php

@@ -0,0 +1,49 @@
+<?php
+
+/**
+ * Configuration for Post-ERG thesis database
+ * Central location for database paths and environment settings
+ */
+
+// Database paths relative to repository root
+define('DB_ROOT', __DIR__ . '/..');
+
+// Local dev database (php -S, never committed)
+define('DB_TEST_PATH', DB_ROOT . '/storage/test.db');
+
+// Production database (nginx/php-fpm on server)
+define('DB_PROD_PATH', DB_ROOT . '/storage/posterg.db');
+
+/**
+ * Determine which database to use.
+ *
+ * - php built-in server (php -S …)  → storage/test.db   (local dev)
+ * - everything else (nginx/fpm)     → storage/posterg.db (production)
+ *
+ * The DB_ENV env-var can still override either way:
+ *   DB_ENV=test  → force test.db
+ *   DB_ENV=prod  → force posterg.db
+ */
+function getDatabasePath(): string {
+    $env = getenv('DB_ENV');
+    if ($env === 'test') {
+        return DB_TEST_PATH;
+    }
+    if ($env === 'prod') {
+        return DB_PROD_PATH;
+    }
+
+    // Auto-detect: php built-in CLI server == local development
+    if (php_sapi_name() === 'cli-server') {
+        return DB_TEST_PATH;
+    }
+
+    return DB_PROD_PATH;
+}
+
+/**
+ * Check if running in local dev mode
+ */
+function isTestMode(): bool {
+    return getDatabasePath() === DB_TEST_PATH;
+}