Revert "fix: 替换不存在的food-o图标为fire-o"

This reverts commit 9aa23638a9.

client/src/views/home/index.vue

@@ -34,7 +34,7 @@ const checkinDays = computed(() => {
 })
 
 const features = [
-  { label: '月子餐',  bg: '#fff0f4', color: '#f43f5e', icon: 'fire-o',       path: '/meal' },
+  { label: '月子餐',  bg: '#fff0f4', color: '#f43f5e', icon: 'food-o',       path: '/meal' },
   { label: '护理记录', bg: '#fffbeb', color: '#f59e0b', icon: 'notes-o',      path: '/care/records' },
   { label: '健康档案', bg: '#f0fdf4', color: '#10b981', icon: 'records-o',    path: '/grow' },
   { label: '服务包',  bg: '#eff6ff', color: '#3b82f6', icon: 'gift-o',        path: '/service/orders' },

client/src/views/layout/TabLayout.vue

@@ -32,7 +32,7 @@ function onCall() {
         <span>首页</span>
       </div>
       <div class="tab-item" :class="{ active: active === 'meal' }" @click="go('meal')">
-        <van-icon name="fire-o" size="23" />
+        <van-icon name="food-o" size="23" />
         <span>用膳</span>
       </div>
       <!-- 中央呼叫按钮 -->