Fix audio player synchronization between streams and personal pages

- Add global audio manager to coordinate playback between different players
- Integrate synchronization into streams-ui.js (streams page player)
- Integrate synchronization into app.js (personal stream player)
- Remove simultaneous playback issues - only one audio plays at a time
- Clean transitions when switching between streams and personal audio

Fixes issue where starting audio on one page didn't stop audio on the other page.

static/global-audio-manager.js

@@ -0,0 +1,125 @@
+/**
+ * Global Audio Manager
+ * Coordinates audio playback between different components to ensure only one audio plays at a time
+ */
+
+class GlobalAudioManager {
+  constructor() {
+    this.currentPlayer = null; // 'streams' or 'personal' or null
+    this.currentUid = null;
+    this.listeners = new Set();
+    
+    // Bind methods
+    this.startPlayback = this.startPlayback.bind(this);
+    this.stopPlayback = this.stopPlayback.bind(this);
+    this.addListener = this.addListener.bind(this);
+    this.removeListener = this.removeListener.bind(this);
+  }
+
+  /**
+   * Register a player that wants to start playback
+   * @param {string} playerType - 'streams' or 'personal'
+   * @param {string} uid - The UID being played
+   * @param {Object} playerInstance - Reference to the player instance
+   */
+  startPlayback(playerType, uid, playerInstance = null) {
+    // If the same player is already playing the same UID, allow it
+    if (this.currentPlayer === playerType && this.currentUid === uid) {
+      return true;
+    }
+
+    // Stop any currently playing audio
+    if (this.currentPlayer && this.currentPlayer !== playerType) {
+      this.notifyStop(this.currentPlayer);
+    }
+
+    // Update current state
+    this.currentPlayer = playerType;
+    this.currentUid = uid;
+    
+    console.log(`Global Audio Manager: ${playerType} player started playing UID: ${uid}`);
+    return true;
+  }
+
+  /**
+   * Notify that playback has stopped
+   * @param {string} playerType - 'streams' or 'personal'
+   */
+  stopPlayback(playerType) {
+    if (this.currentPlayer === playerType) {
+      console.log(`Global Audio Manager: ${playerType} player stopped`);
+      this.currentPlayer = null;
+      this.currentUid = null;
+    }
+  }
+
+  /**
+   * Get current playback state
+   */
+  getCurrentState() {
+    return {
+      player: this.currentPlayer,
+      uid: this.currentUid
+    };
+  }
+
+  /**
+   * Check if a specific player is currently active
+   */
+  isPlayerActive(playerType) {
+    return this.currentPlayer === playerType;
+  }
+
+  /**
+   * Add a listener for stop events
+   * @param {string} playerType - 'streams' or 'personal'
+   * @param {Function} callback - Function to call when this player should stop
+   */
+  addListener(playerType, callback) {
+    const listener = { playerType, callback };
+    this.listeners.add(listener);
+    return listener;
+  }
+
+  /**
+   * Remove a listener
+   */
+  removeListener(listener) {
+    this.listeners.delete(listener);
+  }
+
+  /**
+   * Notify a specific player type to stop
+   */
+  notifyStop(playerType) {
+    console.log(`Global Audio Manager: Notifying ${playerType} player to stop`);
+    this.listeners.forEach(listener => {
+      if (listener.playerType === playerType) {
+        try {
+          listener.callback();
+        } catch (error) {
+          console.error(`Error calling stop callback for ${playerType}:`, error);
+        }
+      }
+    });
+  }
+
+  /**
+   * Force stop all playback
+   */
+  stopAll() {
+    if (this.currentPlayer) {
+      this.notifyStop(this.currentPlayer);
+      this.currentPlayer = null;
+      this.currentUid = null;
+    }
+  }
+}
+
+// Create singleton instance
+export const globalAudioManager = new GlobalAudioManager();
+
+// Make it available globally for debugging
+if (typeof window !== 'undefined') {
+  window.globalAudioManager = globalAudioManager;
+}