clean up type declarations

api/types/tracks.d.ts

@@ -0,0 +1,30 @@
+type TrackSchema = {
+  name: string;
+  artists: Array<{
+    name: string;
+  }>;
+  album: {
+    name: string;
+    images: Array<{
+      url: string;
+    }>;
+  };
+  imageUrl?: string;
+  external_urls: {
+    spotify: string;
+  };
+};
+
+type Track = {
+  isPlaying: boolean;
+  artist?: string;
+  title?: string;
+  album?: string;
+  imageUrl?: string;
+  songUrl?: string;
+};
+
+type Activity = {
+  is_playing: boolean;
+  item?: TrackSchema;
+};