feat(components): 在图片组件中添加长按显示菜单功能

pages_tool/ai-chat/ai-chat-message.vue

@@ -18,8 +18,8 @@
       <!-- 消息列表 -->
       <view 
         v-for="(message, index) in messages.filter(msg => msg.content && msg.content.trim() !== '')" 
-        :key="`msg-${message.id || message.timestamp}-${index}`"  
-        :id="`msg-${message.id || message.timestamp}-${index}`"
+        :key="getMessageKey(message, index)"  
+        :id="getMessageKey(message, index)"
         class="message-item"
         :class="[message.role, { 'first-message': index === 0 }]">
         
@@ -27,7 +27,7 @@
         <view v-if="message.role === 'user'" class="user-message">
           <view class="avatar" @tap="openAvatarSelector">
             <!-- 绑定本地用户头像，支持实时更新 -->
-            <image :src="localUserAvatar" mode="aspectFill" />
+            <image :src="localUserAvatar" mode="aspectFill"  show-menu-by-longpress/>
           </view>
           <view class="message-content">
             <!-- 新增：显示用户昵称 -->
@@ -54,7 +54,7 @@
               :src="aiAvatarUrl" 
               mode="aspectFill" 
               @error="handleAvatarError"
-            />
+             show-menu-by-longpress/>
             <text v-else class="avatar-emoji">🤖</text>
           </view>
           <view class="message-content">
@@ -148,7 +148,7 @@
               <view v-else-if="message.type === 'link'" class="link-content">
                 <view class="link-card" @click="openLink(message)">
                   <view class="link-image" v-if="message.image">
-                    <image :src="message.image" mode="aspectFill" />
+                    <image :src="message.image" mode="aspectFill"  show-menu-by-longpress/>
                   </view>
                   <view class="link-info">
                     <text class="link-title">{{ message.title }}</text>
@@ -361,7 +361,7 @@
         <view class="avatar-selector-content">
           <!-- 预览当前头像 -->
           <view class="current-avatar-preview">
-            <image :src="localUserAvatar" mode="aspectFill" />
+            <image :src="localUserAvatar" mode="aspectFill"  show-menu-by-longpress/>
           </view>
           <view class="avatar-selector-actions">
             <button class="avatar-select-action" @click="chooseAvatarFromAlbum">
@@ -590,6 +590,12 @@ export default {
     }
   },
   methods: {
+    // 生成消息的唯一 key（兼容非 H5 平台）
+    getMessageKey(message, index) {
+      const id = message.id || message.timestamp || index;
+      return 'msg-' + id + '-' + index;
+    },
+    
     // 更新键盘高度
     updateKeyboardHeight(height) {
       this.keyboardHeight = height;