feat: web UI + QR login + portable build

- Add web UI panel (dark theme) at / with REST API
- Add Bilibili QR code scan login with browser header emulation
- Add wanakana for English -> katakana conversion
- Add volume control (0%-200%)
- Add message format with '说、' pause marker
- PyInstaller --onedir build for portable exe
- Rate-limit danmaku logging (1/20)
- Fix aiohttp.access log spam
- Add README.md

audio_player.py

@@ -4,35 +4,28 @@ import asyncio
 import io
 import logging
 
+import numpy as np
 import sounddevice as sd
 import soundfile as sf
 
 logger = logging.getLogger(__name__)
 
 
-def play_wav(wav_data: bytes) -> None:
-    """Play WAV audio data synchronously (blocking).
-
-    Args:
-        wav_data: Raw WAV file bytes.
-    """
+def play_wav(wav_data: bytes, volume: int = 100) -> None:
     data, samplerate = sf.read(io.BytesIO(wav_data), dtype="float32")
+    if volume != 100:
+        gain = max(0.0, volume / 100.0)
+        data = np.clip(data * gain, -1.0, 1.0)
     sd.play(data, samplerate)
     sd.wait()
 
 
-async def play_wav_async(wav_data: bytes) -> None:
-    """Play WAV audio data asynchronously.
-
-    Args:
-        wav_data: Raw WAV file bytes.
-    """
+async def play_wav_async(wav_data: bytes, volume: int = 100) -> None:
     loop = asyncio.get_running_loop()
-    await loop.run_in_executor(None, play_wav, wav_data)
+    await loop.run_in_executor(None, play_wav, wav_data, volume)
 
 
 def get_output_devices() -> list[dict]:
-    """List available audio output devices."""
     devices = sd.query_devices()
     result = []
     for i, dev in enumerate(devices):