merge: maestro/tsk_sjzC4B9ctg6W [tsk_sjzC4B9ctg6W]

src/api/server.ts

@@ -132,6 +132,9 @@ export function buildServer(opts: ApiOptions): FastifyInstance {
     return { totalActive: runs.length, agents, usage: await getUsage() };
   });
 
+  // Claude 订阅额度（5 小时 + 周窗口）单独透传；查询失败 → null（前端/CLI 降级显示）
+  app.get('/api/usage', async () => await getUsage());
+
   app.get('/api/projects/:id/tasks', (req) => {
     const { id } = req.params as { id: string };
     return store.listTasks(id);