Allow referencing other apps (#692)

- [x] Update chat_stream_handlers
- [x] Update token handlers
- [x] Update HomeChatInput
- [x] update lexical chat input: do not allow referencing same app
(current app, or other already selected apps)
- [x] I don't think smart context will work on this...
- [x] Enter doesn't clear...

package.json

@@ -89,8 +89,10 @@
     "@ai-sdk/openai-compatible": "^0.2.13",
     "@biomejs/biome": "^1.9.4",
     "@dyad-sh/supabase-management-js": "v1.0.0",
+    "@lexical/react": "^0.33.1",
     "@monaco-editor/react": "^4.7.0-rc.0",
     "@neondatabase/api-client": "^2.1.0",
+    "@neondatabase/serverless": "^1.0.1",
     "@openrouter/ai-sdk-provider": "^0.4.5",
     "@radix-ui/react-accordion": "^1.2.4",
     "@radix-ui/react-alert-dialog": "^1.1.13",
@@ -133,6 +135,8 @@
     "isomorphic-git": "^1.30.1",
     "jotai": "^2.12.2",
     "kill-port": "^2.0.1",
+    "lexical": "^0.33.1",
+    "lexical-beautiful-mentions": "^0.1.47",
     "lucide-react": "^0.487.0",
     "monaco-editor": "^0.52.2",
     "ollama-ai-provider": "^1.2.0",