feat: proper video playback including images and videos on the timeline

apps/web/src/stores/playback-store.ts

@@ -6,24 +6,67 @@ interface PlaybackStore extends PlaybackState, PlaybackControls {
   setCurrentTime: (time: number) => void;
 }
 
+let playbackTimer: NodeJS.Timeout | null = null;
+
+const startTimer = (store: any) => {
+  if (playbackTimer) clearInterval(playbackTimer);
+  
+  playbackTimer = setInterval(() => {
+    const state = store();
+    if (state.isPlaying && state.currentTime < state.duration) {
+      const newTime = state.currentTime + 0.1;
+      if (newTime >= state.duration) {
+        state.pause();
+      } else {
+        state.setCurrentTime(newTime);
+        // Notify video elements to sync
+        window.dispatchEvent(new CustomEvent('playback-update', { detail: { time: newTime } }));
+      }
+    }
+  }, 100);
+};
+
+const stopTimer = () => {
+  if (playbackTimer) {
+    clearInterval(playbackTimer);
+    playbackTimer = null;
+  }
+};
+
 export const usePlaybackStore = create<PlaybackStore>((set, get) => ({
   isPlaying: false,
   currentTime: 0,
   duration: 0,
   volume: 1,
 
-  play: () => set({ isPlaying: true }),
-  pause: () => set({ isPlaying: false }),
-  toggle: () => set((state) => ({ isPlaying: !state.isPlaying })),
+  play: () => {
+    set({ isPlaying: true });
+    startTimer(get);
+  },
+
+  pause: () => {
+    set({ isPlaying: false });
+    stopTimer();
+  },
+
+  toggle: () => {
+    const { isPlaying } = get();
+    if (isPlaying) {
+      get().pause();
+    } else {
+      get().play();
+    }
+  },
+
   seek: (time: number) => {
     const { duration } = get();
     const clampedTime = Math.max(0, Math.min(duration, time));
     set({ currentTime: clampedTime });
     
-    // Notify video element to seek
-    const event = new CustomEvent('playback-seek', { detail: { time: clampedTime } });
-    window.dispatchEvent(event);
+    // Notify video elements to seek
+    window.dispatchEvent(new CustomEvent('playback-seek', { detail: { time: clampedTime } }));
   },
+  
   setVolume: (volume: number) => set({ volume: Math.max(0, Math.min(1, volume)) }),
   setDuration: (duration: number) => set({ duration }),
   setCurrentTime: (time: number) => set({ currentTime: time }),