Drop the nested form now twui guards a missing one

twui 0.1.5 makes Form's change handler tolerate a field with no form
ancestor, so the modal's own form is no longer needed to keep a change in
it from throwing.

package.json

@@ -40,7 +40,7 @@
         "@modelcontextprotocol/sdk": "^1.32.1",
         "@moduletrace/bun-sqlite": "^1.3.0",
         "@moduletrace/bunext": "^1.3.3",
-        "@moduletrace/twui": "^0.1.4",
+        "@moduletrace/twui": "^0.1.5",
         "@tiptap/extension-bubble-menu": "3.32.0",
         "@tiptap/extension-mention": "3.32.0",
         "@tiptap/extension-placeholder": "3.32.0",