fix: clamp volume input between 0 and 100

Co-authored-by: aider (gemini/gemini-3.1-pro-preview) <aider@aider.chat>

main.py

@@ -70,7 +70,8 @@ def playback_thread(file_path, state):
                 
                 # Apply volume
                 if vol != 100.0:
-                    multiplier = max(0.0, vol / 100.0)
+                    # Use cubic curve for more natural volume adjustment (human hearing is logarithmic)
+                    multiplier = max(0.0, (vol / 100.0) ** 3)
                     arr = arr.astype(np.float32) * multiplier
                     arr = np.clip(arr, -32768, 32767).astype(np.int16)
                     
@@ -118,7 +119,7 @@ def handle_ipc_client(conn, state):
                             if prop == "pause":
                                 state.paused = bool(val)
                             elif prop == "volume":
-                                state.volume = float(val)
+                                state.volume = max(0.0, min(100.0, float(val)))
                             elif prop == "time-pos":
                                 state.seek_request = float(val)
                             else: