fix: upgrade @assistant-ui/react to 0.12.24 for tap@0.5.7 compatibility

@assistant-ui/react@0.11.x uses the old tap API (createContext, tapContext etc.)
which conflicts with tap@0.5.7 (new API). Upgrading to 0.12.24 which uses the
new tap API and is compatible with the existing override.

https://claude.ai/code/session_01YGNupgHxmKvUdpX1x72xjR

Author: claude

package.json

@@ -25,9 +25,9 @@
     "@ai-sdk/openai": "^2.0.32",
     "@ai-sdk/openai-compatible": "^1.0.19",
     "@ai-sdk/react": "^3.0.150",
-    "@assistant-ui/react": "^0.11.14",
-    "@assistant-ui/react-ai-sdk": "^1.1.0",
-    "@assistant-ui/react-markdown": "^0.11.0",
+    "@assistant-ui/react": "^0.12.24",
+    "@assistant-ui/react-ai-sdk": "^1.3.18",
+    "@assistant-ui/react-markdown": "^0.12.8",
     "@auth/prisma-adapter": "^2.11.1",
     "@aws-sdk/client-s3": "^3.932.0",
     "@aws-sdk/s3-request-presigner": "^3.932.0",