feat(mini): 各页面增加分享入口（好友/朋友圈）及设置页微调

mini/pages/settings/settings.wxml

@@ -8,25 +8,24 @@
           <text>客</text>
         </view>
         <view>
-          <text class="text-base font-medium">{{userInfo.nickname || '微信用户'}}</text>
+          <text class="text-sm font-medium">{{userInfo.nickname || '授权用户'}}</text>
           <text class="text-xs text-muted block">已登录，生辰档案云端同步</text>
         </view>
       </view>
       <view class="btn-ghost text-muted" bindtap="logout">退出</view>
     </view>
-    <block wx:else>
-      <view class="flex items-center gap-2 mb-2">
+    <view class="flex items-center justify-between" wx:else>
+      <view class="flex items-center gap-2">
         <view class="avatar avatar-placeholder">
           <text>客</text>
         </view>
         <view>
-          <text class="text-base font-medium">未登录</text>
-          <text class="text-xs text-muted block">绑定的生辰仅保存在本机，登录后才生效</text>
+          <text class="text-sm font-medium">未登录</text>
+          <text class="text-xs text-muted block">登录后生辰档案云端同步，换设备不丢失</text>
         </view>
       </view>
-      <view class="btn-primary text-center" bindtap="login">{{logging ? '登录中…' : '微信登录'}}</view>
-      <view class="text-xs text-muted text-center mt-2">登录后可将生辰档案同步到云端，换设备不丢失</view>
-    </block>
+      <view class="btn-primary btn-sm" bindtap="login">{{logging ? '登录中…' : '授权登录'}}</view>
+    </view>
   </view>
 
   <!-- 我的数据 -->
@@ -76,10 +75,9 @@
   <!-- 关于 -->
   <view class="card">
     <view class="section-title">关于</view>
-    <view class="text-sm text-muted">
-      <text>老黄历小程序 v{{version}}</text>
+    <view class="text-xs text-muted">
+      <text>老黄历 v{{version}}</text>
       <text class="block mt-1" wx:if="{{buildNumber !== '0'}}">构建 #{{buildNumber}} ({{commitSha}})</text>
-      <text class="block mt-1">提供农历、黄历、八字、许愿等功能</text>
     </view>
   </view>
 </view>