fix: fix bugs in MPRIS, and improve MPRIS (#1760)

Co-authored-by: JellyBrick <shlee1503@naver.com>
Co-authored-by: Totto <32566573+Totto16@users.noreply.github.com>

src/types/queue.ts

@@ -0,0 +1,40 @@
+import type { YoutubePlayer } from '@/types/youtube-player';
+import type { GetState, QueueItem } from '@/types/datahost-get-state';
+
+type StoreState = GetState;
+type Store = {
+  dispatch: (obj: {
+    type: string;
+    payload?: {
+      items?: QueueItem[];
+    };
+  }) => void;
+
+  getState: () => StoreState;
+  replaceReducer: (param1: unknown) => unknown;
+  subscribe: (callback: () => void) => unknown;
+}
+
+export type QueueElement = HTMLElement & {
+  dispatch(obj: {
+    type: string;
+    payload?: unknown;
+  }): void;
+  queue: QueueAPI;
+};
+export type QueueAPI = {
+  getItems(): QueueItem[];
+  store: {
+    store: Store,
+  };
+  continuation?: string;
+  autoPlaying?: boolean;
+};
+export type AppElement = HTMLElement & AppAPI;
+export type AppAPI = {
+  queue_: QueueAPI;
+  playerApi_: YoutubePlayer;
+  openToast: (message: string) => void;
+
+  // TODO: Add more
+};