feat(engine): 添加 Vosk 本地离线引擎支持

- 新增 Vosk 引擎配置和识别逻辑
- 更新用户界面，增加 Vosk 引擎选项和模型路径设置
- 更新依赖，添加 vosk 库

caption-engine/sysaudio/win.py

@@ -57,7 +57,7 @@ class AudioStream:
         self.stream = None
         self.SAMP_WIDTH = pyaudio.get_sample_size(pyaudio.paInt16)
         self.FORMAT = pyaudio.paInt16
-        self.CHANNELS = self.device["maxInputChannels"]
+        self.CHANNELS = int(self.device["maxInputChannels"])
         self.RATE = int(self.device["defaultSampleRate"])
         self.CHUNK = self.RATE // chunk_rate
         self.INDEX = self.device["index"]