feat: add bridge service for mini program web-view integration

- Implemented a bridge utility for sharing, copying links, and setting the navigation bar title in mini program web-view.
- Added methods for sharing content and copying links to clipboard.
- Included error handling for non-mini program environments.

frontend/src/app/pages/SharePage.tsx

@@ -19,7 +19,8 @@ import { toPng } from "html-to-image";
 import { Card } from "../components/ui/card";
 import { Badge } from "../components/ui/badge";
 import { Button } from "../components/ui/button";
-import { generateShareData } from "../services/api";
+import { generateShareData } from "../services/api"
+import bridge from "../services/bridge";
 
 type SaveStatus = "idle" | "generating" | "success" | "error";
 
@@ -305,7 +306,26 @@ export function SharePage() {
 
       {/* 底部固定操作栏 */}
       <div className="fixed bottom-0 left-0 right-0 bg-white border-t border-gray-200 p-4 pb-safe z-10">
-        <div className="max-w-md mx-auto">
+        <div className="max-w-md mx-auto space-y-3">
+          {/* 微信分享按钮（仅在 web-view 环境下生效） */}
+          <Button
+            onClick={() => bridge.share({
+              title: '孕育无忧 · 报告解读',
+              summary: shareData?.overall_summary || shareData?.emotional_summary || '',
+              href: window.location.href,
+              scene: 'WXSceneSession',
+            })}
+            className="w-full h-14 rounded-2xl text-base font-semibold flex items-center justify-center gap-2 bg-[#07C160] hover:bg-[#06AD56] text-white shadow-lg shadow-green-300/30"
+          >
+            <Share2 className="w-5 h-5" />
+            <span>分享给微信好友</span>
+          </Button>
+          <Button
+            onClick={() => bridge.copyLink(window.location.href)}
+            className="w-full h-12 rounded-2xl text-sm font-medium flex items-center justify-center gap-2 border-2 border-gray-200 bg-white hover:bg-gray-50 text-gray-600"
+          >
+            <span>复制链接分享</span>
+          </Button>
           <Button
             onClick={handleSaveImage}
             disabled={saveStatus === "generating"}
@@ -320,7 +340,7 @@ export function SharePage() {
             {getSaveButtonContent()}
           </Button>
           <p className="text-center text-xs text-gray-400 mt-2">
-            图片将保存到您的手机相册中
+            分享到微信或保存图片到相册
           </p>
         </div>
       </div>

frontend/src/app/services/bridge.ts

@@ -0,0 +1,82 @@
+/**
+ * 小程序 WebView 桥接工具
+ *
+ * 在 H5（app_03）中调用此工具，可实现分享、复制链接等功能。
+ * 小程序侧（crmeb web_view）通过 @message 监听处理。
+ *
+ * 使用方式：
+ *   import bridge from '../services/bridge'
+ *
+ *   // 分享给好友
+ *   bridge.share({ title: '标题', href: window.location.href })
+ *
+ *   // 复制链接
+ *   bridge.copyLink(window.location.href)
+ */
+
+declare const wx: any
+
+function getMiniProgram() {
+  try {
+    if (typeof wx !== 'undefined' && wx.miniProgram) {
+      return wx.miniProgram
+    }
+  } catch {
+    // ignore
+  }
+  return null
+}
+
+const bridge = {
+  postMessage(data: Record<string, any>) {
+    const mp = getMiniProgram()
+    if (mp) {
+      mp.postMessage({ data })
+    } else {
+      console.warn('[bridge] 不在小程序 web-view 环境中')
+    }
+  },
+
+  /**
+   * 分享给微信好友 / 朋友圈
+   */
+  share(opts: {
+    title: string
+    href?: string
+    summary?: string
+    imageUrl?: string
+    scene?: 'WXSceneSession' | 'WXSceneTimeline'
+  }) {
+    this.postMessage({
+      action: 'share',
+      title: opts.title || '',
+      href: opts.href || window.location.href,
+      summary: opts.summary || '',
+      imageUrl: opts.imageUrl || '',
+      scene: opts.scene || 'WXSceneSession',
+    })
+  },
+
+  /**
+   * 复制链接到剪贴板
+   */
+  copyLink(link?: string) {
+    this.postMessage({
+      action: 'copyLink',
+      href: link || window.location.href,
+    })
+  },
+
+  /**
+   * 设置小程序导航栏标题
+   */
+  setTitle(title: string) {
+    if (!title) return
+    this.postMessage({
+      action: 'setTitle',
+      title,
+    })
+  },
+}
+
+export default bridge