don't allow an empty queue; just add one random track wnever the queue empties

music-api.py

@@ -175,20 +175,11 @@ def pick_station_id_file():
         return None
     return os.path.join(STATION_ID_DIR, random.choice(files))
 
-### FIXME:
 def pick_random_track():
-    conn = sqlite3.connect(DB_PATH)
-    c = conn.cursor()
-    c.execute("""
-        SELECT path
-        FROM tracks
-        WHERE is_station_id = 0
-        ORDER BY RANDOM()
-        LIMIT 1
-    """)
-    row = c.fetchone()
-    conn.close()
-    return row[0] if row else None
+    """Return a random music track (relative path) from TRACKS."""
+    if not TRACKS:
+        return None
+    return random.choice(list(TRACKS.keys()))
 
 def set_rds(text: str):
     global rds_pipe
@@ -439,9 +430,6 @@ def restart_radio_chain():
     print("[WATCHDOG] Restarting pifmadv")
     start_pifm()
 
-    print("[WATCHDOG] Restarting persistent WAV wrapper")
-    start_persistent_wav()
-
     # Your addition: broadcast station ID
     id_file = pick_station_id_file()
     if id_file:
@@ -656,17 +644,16 @@ def worker():
                     empty = True
                 else:
                     empty = False
-### FIXME:
+
                 if empty:
-                write_silence(0.25)
-                time.sleep(0.5)
-                # Ensure the queue is never empty
                     track = pick_random_track()
                     if track:
                         print(f"[WORKER] Queue empty — adding random track: {track}")
+                        with queue_lock:
                             queue.append(track)
                     continue
 
+
             # Shuffle only when building the play order
             if shuffle_mode:
                 with queue_lock: