ui: show Agents first in module chooser

tests/unit/module-navigation.test.tsx

@@ -71,7 +71,12 @@ describe('AI module navigation', () => {
     for (const moduleId of ['programming', 'painting', 'robot', 'cloud_agents'] as const) {
       expect(screen.getByTestId(`ai-module-option-${moduleId}`).querySelector('.module-option-artwork')).toBeNull();
     }
-    expect(screen.getAllByTestId(/^ai-module-option-/u)).toHaveLength(4);
+    expect(screen.getAllByTestId(/^ai-module-option-/u).map((option) => option.dataset.testid)).toEqual([
+      'ai-module-option-cloud_agents',
+      'ai-module-option-programming',
+      'ai-module-option-painting',
+      'ai-module-option-robot',
+    ]);
     expect(screen.queryByTestId('ai-module-option-learning')).not.toBeInTheDocument();
     expect(screen.queryByText('先选一个入口。进入后，你还可以从左下角随时切换到其他模块。')).not.toBeInTheDocument();
     expect(screen.queryByText('选择创作空间。你可以随时从侧边栏切换。')).not.toBeInTheDocument();