feat(web): protect phone data and polish release UI

apps/web/src/settings/instance-settings-page.test.tsx

@@ -80,6 +80,7 @@ describe('Settings instances page', () => {
   it('is explicitly unavailable without an injected fleet source', () => {
     render(<InstanceSettingsPage />);
     expect(screen.getByRole('heading', { name: '实例' })).toBeTruthy();
+    expect(screen.queryByText('配置此工作区可用的 SimAdmin 实例。')).toBeNull();
     expect(screen.getByRole('status', { name: '实例不可用' }).textContent).toMatch(
       /未提供实例总览数据源/i,
     );

apps/web/src/settings/instance-settings-page.tsx

@@ -203,7 +203,6 @@ export function InstanceSettingsPage({
           <h1 id="settings-instances-title">
             <Title color="app-green">实例</Title>
           </h1>
-          <p>配置此工作区可用的 SimAdmin 实例。</p>
         </div>
         <a href="/instances/new">添加实例</a>
       </header>