更新自定义标签栏，替换特殊按钮图标为新的伙伴图标，并调整图标尺寸以提升视觉效果。

miniprogram/assets/icons/partners.svg

@@ -0,0 +1,18 @@
+<svg viewBox="0 0 48 48" xmlns="http://www.w3.org/2000/svg">
+  <!-- 两个人的头：完全分开，中间留空隙 -->
+  <!-- 左侧头部 -->
+  <circle cx="16" cy="18" r="7" fill="white" />
+  <!-- 右侧头部 -->
+  <circle cx="32" cy="18" r="7" fill="white" />
+
+  <!-- 左侧身体：单独一块，和右侧之间留出明显空隙 -->
+  <path
+    d="M10 34c0-4 2.5-7 6-7h0c3 0 5.5 3 5.5 7v4H10v-4z"
+    fill="white"
+  />
+  <!-- 右侧身体：单独一块，和左侧之间留出明显空隙 -->
+  <path
+    d="M26 34c0-4 2.5-7 6-7h0c3 0 5.5 3 5.5 7v4H26v-4z"
+    fill="white"
+  />
+</svg>

miniprogram/custom-tab-bar/index.wxml

@@ -28,7 +28,7 @@
   <view class="tab-bar-item special-item" wx:if="{{matchEnabled}}" data-path="{{list[2].pagePath}}" data-index="2" bindtap="switchTab">
     <view class="special-button {{selected === 2 ? 'special-active' : ''}}">
       <image class="special-icon" 
-             src="/assets/icons/sparkles.svg" 
+             src="/assets/icons/partners.svg" 
              mode="aspectFit"></image>
     </view>
     <view class="tab-bar-text special-text" style="color: {{selected === 2 ? selectedColor : color}}">{{list[2].text}}</view>

miniprogram/custom-tab-bar/index.wxss

@@ -114,8 +114,8 @@
 
 /* ===== 找伙伴特殊按钮图标 ===== */
 .special-icon {
-  width: 56rpx;
-  height: 56rpx;
+  width: 80rpx;
+  height: 80rpx;
   display: block;
   filter: brightness(0) saturate(100%) invert(100%) sepia(0%) saturate(0%) hue-rotate(0deg) brightness(100%) contrast(100%);
 }