feat: remove OpenCode assistant mode

backend/routes/assistants.py

@@ -17,6 +17,7 @@ from fastapi import APIRouter, Depends, HTTPException
 from schemas import (
     AssistantOut,
     AssistantUpsert,
+    SUPPORTED_ASSISTANT_TYPES,
 )
 from services.auth import require_admin
 from services.masking import mask, resolve_incoming_key
@@ -607,6 +608,8 @@ async def _tool_bindings(session: AsyncSession, assistant_id: str) -> list[dict]
 
 
 async def _to_out(session: AsyncSession, assistant: Assistant) -> AssistantOut:
+    if assistant.type not in SUPPORTED_ASSISTANT_TYPES:
+        raise HTTPException(410, "该助手类型已下线")
     return AssistantOut(
         id=assistant.id,
         name=assistant.name,
@@ -647,7 +650,11 @@ async def _to_out(session: AsyncSession, assistant: Assistant) -> AssistantOut:
 @router.get("", response_model=list[AssistantOut])
 async def list_assistants(session: AsyncSession = Depends(get_session)):
     rows = (
-        await session.execute(select(Assistant).order_by(Assistant.updated_at.desc()))
+        await session.execute(
+            select(Assistant)
+            .where(Assistant.type.in_(SUPPORTED_ASSISTANT_TYPES))
+            .order_by(Assistant.updated_at.desc())
+        )
     ).scalars().all()
     return [await _to_out(session, assistant) for assistant in rows]
 
@@ -703,6 +710,8 @@ async def duplicate_assistant(
     source = await session.get(Assistant, assistant_id)
     if not source:
         raise HTTPException(404, "助手不存在")
+    if source.type not in SUPPORTED_ASSISTANT_TYPES:
+        raise HTTPException(410, "该助手类型已下线")
     assistant = Assistant(
         id=f"asst_{uuid.uuid4().hex[:12]}",
         name=f"{source.name} 副本",