Merge branch 'refactor/backend-architecture' into development

api/app/adapters/tts/openai_tts.py

@@ -0,0 +1,27 @@
+"""OpenAI TTS adapter — implements TTSProvider port."""
+
+from io import BytesIO
+
+from openai import OpenAI
+
+
+class OpenAITTSProvider:
+    def __init__(self, api_key: str, model: str = "tts-1"):
+        self._client = OpenAI(api_key=api_key) if api_key else None
+        self._model = model
+
+    async def synthesize(self, text: str, voice: str = "alloy") -> bytes:
+        if not self._client:
+            return b""
+        try:
+            response = self._client.audio.speech.create(
+                model=self._model,
+                voice=voice,
+                input=text,
+            )
+            buf = BytesIO()
+            for chunk in response.iter_bytes():
+                buf.write(chunk)
+            return buf.getvalue()
+        except Exception:
+            return b""