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.tsx

@@ -1,6 +1,12 @@
+import { ClipboardPaste } from 'lucide-react';
+
 import { PlatformActionButton } from '../common/PlatformActionButton';
 import { PlatformStatusMessage } from '../common/PlatformStatusMessage';
 import { PlatformTextField } from '../common/PlatformTextField';
+import {
+  canPasteFromNativeHostClipboard,
+  readNativeHostClipboardText,
+} from './platformProfileHostClipboard';
 import { PlatformProfileModalShell } from './PlatformProfileModalShell';
 
 export type PlatformProfileRewardCodeRedeemModalProps = {
@@ -26,6 +32,15 @@ export function PlatformProfileRewardCodeRedeemModal({
   onSubmit,
   onClose,
 }: PlatformProfileRewardCodeRedeemModalProps) {
+  const canPasteRewardCode = canPasteFromNativeHostClipboard();
+  const pasteRewardCode = () => {
+    void readNativeHostClipboardText().then((text) => {
+      if (text) {
+        onChange(text);
+      }
+    });
+  };
+
   return (
     <PlatformProfileModalShell
       title="兑换码"
@@ -62,6 +77,20 @@ export function PlatformProfileRewardCodeRedeemModal({
         aria-label="兑换码"
         autoFocus
       />
+      {canPasteRewardCode ? (
+        <PlatformActionButton
+          type="button"
+          surface="profile"
+          tone="ghost"
+          size="xs"
+          shape="pill"
+          fullWidth
+          onClick={pasteRewardCode}
+        >
+          <ClipboardPaste className="h-3.5 w-3.5" />
+          粘贴
+        </PlatformActionButton>
+      ) : null}
       {error ? (
         <PlatformStatusMessage
           tone="error"