fix: 语音改用 OkHttp 下载后本地播放

MediaPlayer 内置 HTTP 在 Android 8.1 设备请求 HTTPS 失败
(NuCachedSource2 error -1)。改为 OkHttp 先下载到缓存再播放

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

app/src/main/java/com/xiaoqu/watch/ui/task/TaskListFragment.kt

@@ -406,28 +406,70 @@ class TaskListFragment : BaseFragment<FragmentTaskListBinding>() {
             stopVoice()  // 清理上一个
             updateVoiceUI(true)
             Timber.d("语音播放: $url")
-            mediaPlayer = MediaPlayer().apply {
-                setAudioAttributes(
+            viewLifecycleOwner.lifecycleScope.launch {
+                try {
+                    // 先用 OkHttp 下载到缓存（MediaPlayer 内置 HTTP 在部分设备 HTTPS 有问题）
+                    val cacheFile = kotlinx.coroutines.withContext(kotlinx.coroutines.Dispatchers.IO) {
+                        downloadToCache(url)
+                    }
+                    if (cacheFile == null) {
+                        Timber.w("语音下载失败: $url")
+                        stopVoice()
+                        return@launch
+                    }
+                    // 从本地文件播放
+                    val player = MediaPlayer()
+                    player.setAudioAttributes(
                         android.media.AudioAttributes.Builder()
                             .setContentType(android.media.AudioAttributes.CONTENT_TYPE_SPEECH)
                             .setUsage(android.media.AudioAttributes.USAGE_MEDIA)
                             .build()
                     )
-                setDataSource(url)
-                setOnPreparedListener {
-                    Timber.d("语音准备完成，开始播放")
-                    start()
-                }
-                setOnCompletionListener { stopVoice() }
-                setOnErrorListener { _, what, extra ->
-                    Timber.w("语音播放失败: what=$what, extra=$extra, url=$url")
+                    player.setDataSource(cacheFile.absolutePath)
+                    player.setVolume(1.0f, 1.0f)
+                    player.setOnCompletionListener { stopVoice() }
+                    player.setOnErrorListener { _, what, extra ->
+                        Timber.w("语音播放错误: what=$what, extra=$extra")
                         stopVoice()
                         true
                     }
-                prepareAsync()
+                    player.prepare()
+                    mediaPlayer = player
+                    player.start()
+                    Timber.d("语音开始播放, duration=${player.duration}ms")
+                } catch (e: Exception) {
+                    Timber.e(e, "语音播放失败: $url")
+                    stopVoice()
                 }
             }
         }
+    }
+
+    /** 用 OkHttp 下载音频文件到缓存目录 */
+    private fun downloadToCache(url: String): java.io.File? {
+        return try {
+            val client = okhttp3.OkHttpClient()
+            val request = okhttp3.Request.Builder().url(url).build()
+            val response = client.newCall(request).execute()
+            if (!response.isSuccessful) {
+                Timber.w("语音下载HTTP错误: ${response.code}")
+                return null
+            }
+            // 写入缓存文件
+            val fileName = "voice_${url.hashCode()}.mp3"
+            val cacheFile = java.io.File(requireContext().cacheDir, fileName)
+            response.body?.byteStream()?.use { input ->
+                cacheFile.outputStream().use { output ->
+                    input.copyTo(output)
+                }
+            }
+            Timber.d("语音下载完成: ${cacheFile.length()} bytes")
+            cacheFile
+        } catch (e: Exception) {
+            Timber.e(e, "语音下载异常")
+            null
+        }
+    }
 
     /** 停止并释放 MediaPlayer，恢复按钮状态 */
     private fun stopVoice() {