Update button styling and render additional elements on file page if authenticated

src/routes/pages.ts

@@ -119,9 +119,16 @@ export const pageRoutes: FastifyPluginAsync<{ deps: Deps }> = async (app, { deps
     reply.redirect('/files');
   });
 
-  // GET /f/:id — public file view
+  // GET /f/:id — public file view (owner-aware)
   app.get<{ Params: { id: string } }>('/f/:id', async (request, reply) => {
     const { id } = request.params;
+
+    let userId: number | null = null;
+    try {
+      await request.jwtVerify();
+      userId = (request.user as JwtPayload).sub;
+    } catch { /* not logged in — fine */ }
+
     const file = getFileById(db, id);
 
     if (!file) {
@@ -129,7 +136,8 @@ export const pageRoutes: FastifyPluginAsync<{ deps: Deps }> = async (app, { deps
       return reply.status(404).type('text/html').send(notFoundPage());
     }
 
-    reply.type('text/html').send(fileViewPage(file));
+    const isOwner = userId !== null && userId === file.user_id;
+    reply.type('text/html').send(fileViewPage(file, isOwner));
   });
 
   // GET /f/:id/raw — serve raw file