the expansion route was doubling the folder into every path

`listOriginals` already includes the prefix in what it yields — it builds
`prefix/name` as it descends — so prefixing again produced
Home_Page_Gallery/Home_Page_Gallery/…, a real-looking path to nothing.

Found by calling the route rather than reading it.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

api/router.ts

@@ -266,9 +266,13 @@ router.get('/_config/media/files', async (ctx) => {
   const scope = ctx.req.query('path') ?? '';
   try {
     const root = await originalsDir(user.email);
+    /*
+      Returned as-is. `listOriginals` already includes the prefix in every path it yields — it builds
+      `prefix/name` as it descends — so prefixing again produced
+      `Home_Page_Gallery/Home_Page_Gallery/…`, a real-looking path to nothing.
+    */
     const files = await listOriginals(root, safeScope(scope));
-    // Prefixed back to the scope, so what comes out is what a gallery item stores.
-    return ctx.json({ files: files.map((file) => (scope ? `${safeScope(scope)}/${file}` : file)) });
+    return ctx.json({ files });
   } catch (error) {
     return ctx.json({ error: (error as Error).message }, 400);
   }