feat: add multi-channel Devii sessions with docs search mode and channel-aware conversation persistence

devplacepy/routers/devii.py

@@ -29,6 +29,7 @@ router = APIRouter()
 
 GUEST_COOKIE = DEVII_GUEST_COOKIE
 GUEST_COOKIE_MAX_AGE = 31536000
+CHANNELS = frozenset({"main", "docs"})
 
 
 def _service():
@@ -208,6 +209,9 @@ async def devii_ws(websocket: WebSocket):
     if not service_manager.owns_lock():
         await websocket.close(code=4013)
         return
+    channel = websocket.query_params.get("channel", "main")
+    if channel not in CHANNELS:
+        channel = "main"
     owner_kind, owner_id, username, api_key, owner_is_admin = _resolve_ws_owner(
         websocket
     )
@@ -225,6 +229,7 @@ async def devii_ws(websocket: WebSocket):
         api_key,
         svc.instance_base_url(),
         is_admin=owner_is_admin,
+        channel=channel,
     )
     session.attach(websocket)
     try: