初始化提交

backend/app/repositories/preferences.py

@@ -0,0 +1,24 @@
+"""生成偏好数据访问（模型网关 §4.3）。
+
+本地单用户单行，按 owner_scope 固定；无则由 service 层返回默认值。
+"""
+
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.governance import GenerationPreferences
+
+
+async def get_preferences(session: AsyncSession, owner_scope: str) -> GenerationPreferences | None:
+    result = await session.execute(
+        select(GenerationPreferences).where(GenerationPreferences.owner_scope == owner_scope)
+    )
+    return result.scalars().first()
+
+
+async def add_preferences(
+    session: AsyncSession, prefs: GenerationPreferences
+) -> GenerationPreferences:
+    session.add(prefs)
+    await session.flush()
+    return prefs