feat: disable user messaging and retain公益 service guidance

miniapp/pages/profile-detail/profile-detail.js

@@ -163,10 +163,7 @@ Page({
           relationStatus: RELATION_STATUS.MUTUAL_MATCH,
           actionLoading: false,
         });
-        appStore.toastSuccess('双向喜欢！可以开始聊天了');
-        if (result.matchedConversationId) {
-          wx.navigateTo({ url: to.chat(result.matchedConversationId) });
-        }
+        appStore.toastSuccess('双向意向匹配成功，可查看公益服务');
       } else {
         this.setData({
           isLiked: true,
@@ -185,19 +182,6 @@ Page({
     }
   },
 
-  /**
-   * 开始聊天（仅 Mutual 后可见，AGENTS 第 3 条）
-   */
-  onGoChat() {
-    const { userId, canChat, profile } = this.data;
-    if (!canChat) {
-      appStore.toast('双方互相喜欢后才能开始聊天');
-      return;
-    }
-    // matchedConversationId 优先来自最近 like 结果；无则用 userId 占位由 chat 页拉取
-    const conversationId = (profile && profile.matchedConversationId) || userId;
-    wx.navigateTo({ url: to.chat(conversationId) });
-  },
 
   /**
    * 举报：跳转 report 页，不在本页处理（AGENTS 第 7 条：举报内容不在此暴露）

miniapp/pages/profile-detail/profile-detail.wxml

@@ -113,14 +113,6 @@
       bind:tap="onReport"
       disabled="{{actionLoading}}"
     >举报</ui-button>
-    <ui-button
-      wx:if="{{canChat}}"
-      variant="secondary"
-      size="md"
-      custom-class="profile-actions__btn"
-      bind:tap="onGoChat"
-      disabled="{{actionLoading}}"
-    >开始聊天</ui-button>
     <ui-button
       wx:if="{{!isLiked}}"
       variant="primary"