接入填码原生剪贴板读取

邀请码填写和兑换码弹窗在宿主声明 clipboard.readText 时显示粘贴入口

粘贴动作只读取宿主纯文本并填入现有受控输入框，不自动提交或伪造兑换成功

补充填码粘贴回归测试和 profile 剪贴板 helper

更新 Expo/Tauri 宿主壳方案、HostBridge 协议和共享决策记录

src/components/platform-entry/PlatformProfileRewardCodeRedeemModal.test.tsx

@@ -2,11 +2,30 @@
 
 import { render, screen } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
-import { describe, expect, test, vi } from 'vitest';
+import { afterEach, describe, expect, test, vi } from 'vitest';
 
+import {
+  canPasteFromNativeHostClipboard,
+  readNativeHostClipboardText,
+} from './platformProfileHostClipboard';
 import { PlatformProfileRewardCodeRedeemModal } from './PlatformProfileRewardCodeRedeemModal';
 
+vi.mock('./platformProfileHostClipboard', () => ({
+  canPasteFromNativeHostClipboard: vi.fn(() => false),
+  readNativeHostClipboardText: vi.fn(),
+}));
+
+const canPasteFromNativeHostClipboardMock = vi.mocked(
+  canPasteFromNativeHostClipboard,
+);
+const readNativeHostClipboardTextMock = vi.mocked(readNativeHostClipboardText);
+
 describe('PlatformProfileRewardCodeRedeemModal', () => {
+  afterEach(() => {
+    vi.clearAllMocks();
+    canPasteFromNativeHostClipboardMock.mockReturnValue(false);
+  });
+
   test('submits on button click and enter key', async () => {
     const user = userEvent.setup();
     const onSubmit = vi.fn();
@@ -50,6 +69,31 @@ describe('PlatformProfileRewardCodeRedeemModal', () => {
     expect(
       screen.getByRole('button', { name: '兑换' }).hasAttribute('disabled'),
     ).toBe(true);
+    expect(screen.queryByRole('button', { name: '粘贴' })).toBeNull();
+  });
+
+  test('can paste reward code from native host clipboard', async () => {
+    const user = userEvent.setup();
+    const onChange = vi.fn();
+    canPasteFromNativeHostClipboardMock.mockReturnValue(true);
+    readNativeHostClipboardTextMock.mockResolvedValue('reward-2026');
+
+    render(
+      <PlatformProfileRewardCodeRedeemModal
+        value=""
+        isSubmitting={false}
+        error={null}
+        success={null}
+        onChange={onChange}
+        onSubmit={vi.fn()}
+        onClose={vi.fn()}
+      />,
+    );
+
+    await user.click(screen.getByRole('button', { name: '粘贴' }));
+
+    expect(readNativeHostClipboardTextMock).toHaveBeenCalledTimes(1);
+    expect(onChange).toHaveBeenCalledWith('reward-2026');
   });
 
   test('reuses the shared profile modal footer chrome for submit action', () => {