feat: require couple binding and refine miniapp settings

Gate record features and storage entry points with invitation guidance; enforce record access in the backend. Add homepage greetings, right-swipe profile dismissal, and move the smoking switch to settings. Simplify API base configuration and remove the unused legacy tab bar component.

weapp/pages/settings/settings.js

@@ -6,6 +6,7 @@ const { guardStorageSpace } = require('../../utils/storage-guard');
 Page({
   onResize: function() { this.setData(getLayout()); },
   data: {
+    smokingVisible:true, smokingKnown:false, smokingSaving:false, smokingError:false,
     showBgModal: false,
     bgPreview: '',
     bgFilePath: '',
@@ -41,6 +42,7 @@ Page({
   },
 
   onShow: async function() {
+    this.loadSmokingPreference();
     this.setData({ bindingKnown: false, bindingError:false });
     try {
       var info = await api.coupleInfo();
@@ -59,6 +61,19 @@ Page({
     }
   },
 
+  loadSmokingPreference: async function() {
+    try { const auth=await api.checkAuth(); this.setData({smokingVisible:Number(auth.user.smoking_card_visible)!==0,smokingKnown:true,smokingError:false}); }
+    catch(error) { this.setData({smokingError:true}); }
+  },
+  toggleSmoking: async function(e) {
+    if (this.data.smokingSaving || !this.data.smokingKnown) return;
+    const previous=this.data.smokingVisible;
+    this.setData({smokingSaving:true});
+    try { const result=await api.smokingCardVisible({visible:e.detail.value?1:0}); this.setData({smokingVisible:Number(result.card_visible)===1}); }
+    catch(error) { this.setData({smokingVisible:previous}); wx.showToast({title:error.error||'保存失败，请重试',icon:'none'}); }
+    finally { this.setData({smokingSaving:false}); }
+  },
+
   goBind: function() {
     getApp().globalData.openProfileBind = true;
     wx.switchTab({ url: '/pages/profile/profile' });