feat/ 添加app-expo三种环境切换，待测试 调整tts

api/app/adapters/tts/tencent_tts.py

@@ -0,0 +1,79 @@
+"""Tencent Cloud TTS adapter — implements TTSProvider port.
+
+API: https://cloud.tencent.com/document/product/1073/37995
+"""
+
+import asyncio
+import base64
+import uuid
+
+from app.core.logging import get_logger
+
+logger = get_logger(__name__)
+
+
+class TencentTTSProvider:
+    def __init__(
+        self,
+        secret_id: str,
+        secret_key: str,
+        voice_type: int = 603004,
+        codec: str = "mp3",
+        sample_rate: int = 16000,
+    ):
+        self._secret_id = secret_id
+        self._secret_key = secret_key
+        self._voice_type = voice_type
+        self._codec = codec
+        self._sample_rate = sample_rate
+        self._client = None
+
+    def _get_client(self):
+        if self._client is not None:
+            return self._client
+        try:
+            from tencentcloud.common import credential
+            from tencentcloud.common.profile.client_profile import ClientProfile
+            from tencentcloud.common.profile.http_profile import HttpProfile
+            from tencentcloud.tts.v20190823 import tts_client
+
+            cred = credential.Credential(self._secret_id, self._secret_key)
+            http_profile = HttpProfile()
+            http_profile.endpoint = "tts.tencentcloudapi.com"
+            client_profile = ClientProfile()
+            client_profile.httpProfile = http_profile
+            self._client = tts_client.TtsClient(cred, "", client_profile)
+            return self._client
+        except Exception as e:
+            logger.error("Tencent TTS client init failed: %s", e)
+            return None
+
+    def _synthesize_sync(self, text: str) -> bytes:
+        """Sync synthesis (run in executor)."""
+        client = self._get_client()
+        if not client:
+            return b""
+        from tencentcloud.tts.v20190823 import models
+
+        req = models.TextToVoiceRequest()
+        req.Text = text[:500]  # 中文约150字，英文约500字母，保守截断
+        req.SessionId = f"tts-{uuid.uuid4().hex}"
+        req.VoiceType = self._voice_type
+        req.Codec = self._codec
+        req.SampleRate = self._sample_rate
+        req.PrimaryLanguage = 1  # 1=中文
+
+        resp = client.TextToVoice(req)
+        if resp.Audio:
+            return base64.b64decode(resp.Audio)
+        return b""
+
+    async def synthesize(self, text: str, voice: str = "alloy") -> bytes:
+        """Convert text to speech. Returns mp3 bytes."""
+        if not text or not self._secret_id or not self._secret_key:
+            return b""
+        try:
+            return await asyncio.to_thread(self._synthesize_sync, text)
+        except Exception as e:
+            logger.error("Tencent TTS synthesize failed: %s", e)
+            return b""