feat(music): lock quality read from guests

src/web/api/music.ts

@@ -3,6 +3,7 @@ import type { MusicProvider } from "../../music/provider.js";
 import { YouTubeProvider } from "../../music/youtube.js";
 import type { Logger } from "../../logger.js";
 import { requirePermission } from "../middleware/requirePermission.js";
+import { requireNotGuest } from "../middleware/requireNotGuest.js";
 
 export function createMusicRouter(
   neteaseProvider: MusicProvider,
@@ -209,7 +210,7 @@ export function createMusicRouter(
   });
 
   // Get current quality
-  router.get("/quality", (_req, res) => {
+  router.get("/quality", requireNotGuest, (_req, res) => {
     res.json({
       netease: neteaseProvider.getQuality(),
       qq: qqProvider.getQuality(),