fix: EdgeTTS 强制 TLS 1.2 兼容 Android 8.1

Android 8.1 默认 TLS 配置可能不支持服务器要求的密码套件，
强制启用 TLS 1.2 + MODERN_TLS + COMPATIBLE_TLS 回退。

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

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

@@ -5,6 +5,8 @@ import android.media.MediaPlayer
 import dagger.hilt.android.qualifiers.ApplicationContext
 import kotlinx.coroutines.*
 import okhttp3.*
+import okhttp3.ConnectionSpec
+import okhttp3.TlsVersion
 import okio.ByteString
 import timber.log.Timber
 import java.io.ByteArrayOutputStream
@@ -29,10 +31,20 @@ class EdgeTtsManager @Inject constructor(
      * 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()
+    private val ttsClient: OkHttpClient = run {
+        // Android 8.1 TLS 兼容：强制启用 TLS 1.2 + 现代密码套件
+        val spec = ConnectionSpec.Builder(ConnectionSpec.MODERN_TLS)
+            .tlsVersions(TlsVersion.TLS_1_2)
+            .build()
+        val compatSpec = ConnectionSpec.Builder(ConnectionSpec.COMPATIBLE_TLS)
+            .tlsVersions(TlsVersion.TLS_1_2, TlsVersion.TLS_1_1)
+            .build()
+        OkHttpClient.Builder()
+            .connectionSpecs(listOf(spec, compatSpec, ConnectionSpec.CLEARTEXT))
+            .connectTimeout(15, java.util.concurrent.TimeUnit.SECONDS)
+            .readTimeout(30, java.util.concurrent.TimeUnit.SECONDS)
+            .build()
+    }
 
     companion object {
         private const val TAG = "EdgeTTS"