fix: add account mobile hints

src/web/pages/Accounts.tsx

@@ -1322,6 +1322,9 @@ export default function Accounts() {
                     const connectionMode = resolveAccountCredentialMode(a);
                     const health = resolveRuntimeHealth(a);
                     const isExpanded = expandedAccountIds.includes(a.id);
+                    const hintMessage = (a.status === 'expired' && !capabilities.proxyOnly)
+                      ? '账号已过期，请重新绑定'
+                      : (health.reason || '-');
                     return (
                       <MobileCard
                         key={a.id}
@@ -1432,6 +1435,10 @@ export default function Accounts() {
                               label="账号状态"
                               value={a.status === 'expired' ? '已过期' : (a.status || '-')}
                             />
+                            <MobileField
+                              label="提示"
+                              value={hintMessage}
+                            />
                           </div>
                         ) : null}
                         <div className="mobile-card-actions">

src/web/pages/accounts.mobile.test.tsx

@@ -0,0 +1,10 @@
+import { describe, expect, it } from 'vitest';
+import { readFileSync } from 'node:fs';
+import { resolve } from 'node:path';
+
+describe('Accounts mobile layout', () => {
+  it('includes hints field in mobile expanded section', () => {
+    const source = readFileSync(resolve(process.cwd(), 'src/web/pages/Accounts.tsx'), 'utf8');
+    expect(source).toContain('label="提示"');
+  });
+});