fix: isolate concurrent OpenCode chat runs

tests/unit/login-page.test.tsx

@@ -464,7 +464,10 @@ describe('Login page', () => {
     await waitFor(() => {
       expect(hostApiFetchMock).toHaveBeenCalledWith('/api/provider-accounts/import-user-model-config', {
         method: 'POST',
-        body: JSON.stringify({ accessToken: 'fresh-access-token' }),
+        body: JSON.stringify({
+          accessToken: 'fresh-access-token',
+          runtimeRefresh: 'apply',
+        }),
       });
     });
   });