fix: EdgeTTS 用独立 OkHttpClient，去掉业务拦截器干扰

WebSocket 连接经过了 SignatureInterceptor/UnbindInterceptor 导致连接被重置。
改为独立的 OkHttpClient，不带任何业务拦截器。

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/src/main/java/com/xiaoqu/watch/service/manager/EdgeTtsManager.kt

@@ -22,10 +22,18 @@ import javax.inject.Singleton
  */
 @Singleton
 class EdgeTtsManager @Inject constructor(
-    @ApplicationContext private val context: Context,
-    private val okHttpClient: OkHttpClient
+    @ApplicationContext private val context: Context
 ) {
 
+    /**
+     * TTS 专用 OkHttpClient（不带业务拦截器）
+     * 业务拦截器（SignatureInterceptor、UnbindInterceptor）会干扰 WebSocket 连接
+     */
+    private val ttsClient = OkHttpClient.Builder()
+        .connectTimeout(10, java.util.concurrent.TimeUnit.SECONDS)
+        .readTimeout(30, java.util.concurrent.TimeUnit.SECONDS)
+        .build()
+
     companion object {
         private const val TAG = "EdgeTTS"
 
@@ -146,7 +154,7 @@ class EdgeTtsManager @Inject constructor(
             val audioBuffer = ByteArrayOutputStream()
             var resumed = false
 
-            val ws = okHttpClient.newWebSocket(request, object : WebSocketListener() {
+            val ws = ttsClient.newWebSocket(request, object : WebSocketListener() {
                 override fun onOpen(webSocket: WebSocket, response: Response) {
                     Timber.d("$TAG: WebSocket 已连接")
 
@@ -182,7 +190,7 @@ class EdgeTtsManager @Inject constructor(
                 }
 
                 override fun onFailure(webSocket: WebSocket, t: Throwable, response: Response?) {
-                    Timber.e(t, "$TAG: WebSocket 连接失败")
+                    Timber.e(t, "$TAG: WebSocket 连接失败, response=${response?.code}, url=$url")
                     // 尝试从错误响应中修正时钟偏移
                     response?.header("Date")?.let { adjustClockSkew(it) }
                     if (!resumed) {