fix(keys): call submit handler directly to avoid stale form linkage (#4858) (#4967)

Users reported that the API key edit drawer's "Save changes" button
becomes unresponsive after the drawer has been open / idle for a
while: no loading state, no request, no error. Reopening the drawer
restores it because a fresh DOM is created.

The button lived in `SheetFooter` (a portaled Base UI Sheet) and was
linked to the form via the HTML `form='api-key-form'` attribute. Once
the portal/DOM relationship goes stale, the click no longer triggers
the form's submit event, hence the silent failure.

Defensive fix: drop the cross-DOM `form` linkage and call
`form.handleSubmit(onSubmit)` directly via `onClick`. The native
submit path (Enter key, original `<form onSubmit>`) is preserved.

Closes #4858

web/default/src/features/keys/components/api-keys-mutate-drawer.tsx

@@ -610,8 +610,8 @@ export function ApiKeysMutateDrawer({
             {t('Close')}
           </SheetClose>
           <Button
-            form='api-key-form'
-            type='submit'
+            type='button'
+            onClick={form.handleSubmit(onSubmit)}
             disabled={isSubmitting}
             className='w-full sm:w-auto'
           >