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

app/router.php

@@ -0,0 +1,26 @@
+<?php
+/**
+ * Router script for PHP built-in development server (php -S).
+ *
+ * Routes /partage/<slug> to public/partage/index.php, since the built-in
+ * server has no URL rewriting like nginx's try_files.
+ */
+
+$uri = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH);
+
+// Route /partage/<slug> and /partage/<slug>/<action> to the partage entry
+if (preg_match('#^/partage(/.*)?$#', $uri)) {
+    $_SERVER['SCRIPT_NAME'] = '/partage/index.php';
+    require __DIR__ . '/public/partage/index.php';
+    return true;
+}
+
+// Route /tfe/<...> to tfe.php
+if (preg_match('#^/tfe(/.*)?$#', $uri)) {
+    $_SERVER['SCRIPT_NAME'] = '/tfe.php';
+    require __DIR__ . '/public/tfe.php';
+    return true;
+}
+
+// Default: serve static files if they exist
+return false;