style: address code-review nits in RecordFormPage + recordFormNavigation

Agent-Logs-Url: https://github.com/objectstack-ai/objectui/sessions/9713a123-0d2a-468d-91e8-915a540eb95c

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

packages/app-shell/src/utils/recordFormNavigation.ts

@@ -172,4 +172,3 @@ export function resolveNavigateEditUrl(opts: {
     url: `${baseUrl}/${objectName}/record/${encoded}/edit`,
   };
 }
-

packages/app-shell/src/views/RecordFormPage.tsx

@@ -152,7 +152,7 @@ export function RecordFormPage({ mode }: RecordFormPageProps) {
   // ModalForm in AppContent so page-mode and modal-mode show the same
   // fields for a given user.
   const fields = useMemo(() => {
-    if (!objectDef?.fields) return [] as string[];
+    if (!objectDef?.fields) return [];
     if (Array.isArray(objectDef.fields)) {
       return (objectDef.fields as any[])
         .filter((f: any) => {
@@ -199,7 +199,7 @@ export function RecordFormPage({ mode }: RecordFormPageProps) {
   return (
     <ExpressionProvider user={expressionUser} app={{ name: appName }} data={{}}>
       <div
-        className="h-full flex flex-col bg-background overflow-hidden"
+        className="flex flex-col h-full overflow-hidden bg-background"
         data-testid="record-form-page"
         data-mode={mode}
       >