Fix YouTube API key access in Modal proxy

modal_proxy.py

@@ -26,6 +26,11 @@ def search_youtube(query: str, limit: int = 5) -> Dict[str, Any]:
     try:
         # YouTube Data API v3 search endpoint
         url = "https://www.googleapis.com/youtube/v3/search"
+        # Get API key from Modal secret
+        api_key = os.environ.get("YOUTUBE_API_KEY", "")
+        if not api_key:
+            return {"success": False, "error": "YouTube API key not found in environment", "tracks": []}
+
         params = {
             'part': 'snippet',
             'q': f"{query} music",
@@ -33,7 +38,7 @@ def search_youtube(query: str, limit: int = 5) -> Dict[str, Any]:
             'maxResults': limit,
             'order': 'relevance',
             'safeSearch': 'moderate',
-            'key': os.environ.get("YOUTUBE_API_KEY", "")  # Use Modal secret
+            'key': api_key
         }
 
         response = requests.get(url, params=params, timeout=30)