fix: 优化架构

engine/adapters/tts/__init__.py

@@ -0,0 +1 @@
+

engine/adapters/tts/base.py

@@ -0,0 +1,9 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+
+class BaseTTS:
+    def generate(self, text: str, output_path: str | Path) -> str:
+        raise NotImplementedError
+

engine/adapters/tts/edge_adapter.py

@@ -0,0 +1,28 @@
+from __future__ import annotations
+
+import asyncio
+from pathlib import Path
+
+from engine.audio_gen import synthesize_one
+from engine.config import AppConfig
+
+from .base import BaseTTS
+
+
+class EdgeTTS(BaseTTS):
+    def __init__(self, cfg: AppConfig):
+        self.cfg = cfg
+
+    def generate(self, text: str, output_path: str | Path) -> str:
+        text = text or " "
+        output_path = Path(output_path)
+        voice = str(self.cfg.get("tts.voice", "zh-CN-XiaoxiaoNeural"))
+        rate = str(self.cfg.get("tts.rate", "+0%"))
+        volume = str(self.cfg.get("tts.volume", "+0%"))
+
+        async def _run():
+            asset = await synthesize_one(text, output_path, voice, rate, volume)
+            return str(asset.path)
+
+        return asyncio.run(_run())
+

engine/adapters/tts/mock_adapter.py

@@ -0,0 +1,15 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+from .base import BaseTTS
+
+
+class MockTTS(BaseTTS):
+    def generate(self, text: str, output_path: str | Path) -> str:
+        # No-op for offline tests: return empty path so video adapter skips audio.
+        output_path = Path(output_path)
+        output_path.parent.mkdir(parents=True, exist_ok=True)
+        output_path.write_bytes(b"")
+        return str(output_path)
+