feat(server): allow chat session dangling & pin session support (#12849)

fix AI-181
fix AI-179
fix AI-178
fix PD-2682
fix PD-2683

packages/frontend/core/src/blocksuite/ai/provider/setup-provider.tsx

@@ -590,6 +590,7 @@ Could you make a new website based on these notes and send back just the html fi
       return client.updateSession({
         sessionId,
         promptName,
+        // TODO(@yoyoyohamapi): update docId & pinned for chat independence
       });
     },
   });