feat: 添加 TTS 中文语音测试（调试模式触发）

设置页快速点击头像6次触发 TTS 测试，验证设备是否支持中文语音合成。
测试结果通过 Toast 和 Logcat 反馈，为后续任务语音播报功能做可行性验证。

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

app/src/main/java/com/xiaoqu/watch/ui/home/HomeFragment.kt

@@ -28,6 +28,7 @@ import com.xiaoqu.watch.ui.punch.PunchResult
 import com.xiaoqu.watch.ui.punch.PunchViewModel
 import com.xiaoqu.watch.ui.widget.StatusBarView
 import com.xiaoqu.watch.util.DateUtil
+import android.speech.tts.TextToSpeech
 import dagger.hilt.android.AndroidEntryPoint
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.isActive
@@ -83,6 +84,9 @@ class HomeFragment : BaseFragment<FragmentHomeBinding>() {
     private var debugTapCount = 0
     private var lastTapTime = 0L
 
+    // ===== TTS 语音测试 =====
+    private var tts: TextToSpeech? = null
+
     override fun createBinding(inflater: LayoutInflater, container: ViewGroup?): FragmentHomeBinding {
         return FragmentHomeBinding.inflate(inflater, container, false)
     }
@@ -179,6 +183,9 @@ class HomeFragment : BaseFragment<FragmentHomeBinding>() {
             it.onBackKeyPressed = null
             it.notificationBanner.onClick = null
         }
+        // 释放 TTS 资源
+        tts?.shutdown()
+        tts = null
     }
 
     // ===== 打卡面板 =====
@@ -548,8 +555,48 @@ class HomeFragment : BaseFragment<FragmentHomeBinding>() {
 
         if (debugTapCount >= 6) {
             debugTapCount = 0
-            Timber.d("调试模式已开启")
+            Timber.d("TTS 语音测试开始")
-            Toast.makeText(requireContext(), "调试模式已开启", Toast.LENGTH_SHORT).show()
+            testTts()
+        }
+    }
+
+    /**
+     * TTS 语音测试：验证设备是否支持中文语音合成
+     * 测试内容：初始化 TTS → 设置中文 → 播放测试语音
+     * 结果通过 Logcat 和 Toast 反馈
+     */
+    private fun testTts() {
+        tts?.shutdown()
+        tts = TextToSpeech(requireContext()) { status ->
+            if (status == TextToSpeech.SUCCESS) {
+                val result = tts?.setLanguage(java.util.Locale.CHINESE)
+                when {
+                    result == TextToSpeech.LANG_MISSING_DATA -> {
+                        Timber.w("TTS: 中文语音包缺失")
+                        activity?.runOnUiThread {
+                            Toast.makeText(requireContext(), "TTS: 中文语音包缺失", Toast.LENGTH_LONG).show()
+                        }
+                    }
+                    result == TextToSpeech.LANG_NOT_SUPPORTED -> {
+                        Timber.w("TTS: 不支持中文")
+                        activity?.runOnUiThread {
+                            Toast.makeText(requireContext(), "TTS: 不支持中文", Toast.LENGTH_LONG).show()
+                        }
+                    }
+                    else -> {
+                        Timber.d("TTS: 中文语音可用，开始播放测试")
+                        activity?.runOnUiThread {
+                            Toast.makeText(requireContext(), "TTS 测试播放中...", Toast.LENGTH_SHORT).show()
+                        }
+                        tts?.speak("您有3条新任务待处理", TextToSpeech.QUEUE_FLUSH, null, "tts_test")
+                    }
+                }
+            } else {
+                Timber.e("TTS: 初始化失败, status=$status")
+                activity?.runOnUiThread {
+                    Toast.makeText(requireContext(), "TTS: 初始化失败", Toast.LENGTH_LONG).show()
+                }
+            }
         }
     }