feat: 整体页面优化，删除无用svg

pages/wiki/index.wxml

@@ -16,38 +16,35 @@
     bindscrolltolower="onReachBottom"
     enhanced
     show-scrollbar="{{false}}"
+    scroll-top="{{scrollTop}}"
   >
     <view class="search-section">
-        <t-search placeholder="搜索植物名称，如：龟背竹" value="{{searchQuery}}" bind:change="onSearchInput" shape="round" />
+        <view class="search-box-card">
+            <t-search placeholder="搜索植物名称，如：龟背竹" value="{{searchQuery}}" bind:change="onSearchInput" shape="round" t-class-input-container="search-input-bg" />
+        </view>
     </view>
 
     <!-- Dynamic Categories from API -->
-    <view class="category-scroll">
-       <t-tag 
-            variant="{{activeCategory === 'all' ? 'dark' : 'outline'}}" 
-            theme="{{activeCategory === 'all' ? 'primary' : 'default'}}" 
-            shape="mark"
-            size="medium"
-            style="margin-right: 16rpx;"
-            bind:tap="setCategory" 
+    <scroll-view class="category-scroll" scroll-x enable-flex show-scrollbar="{{false}}">
+       <view 
+            class="category-item {{activeCategory === 'all' ? 'active' : ''}}" 
+            bindtap="setCategory" 
             data-cat="all"
-        >
-            全部
-        </t-tag>
-       <t-tag 
+       >
+            <text>全部</text>
+       </view>
+       <view 
             wx:for="{{categories}}" 
-            wx:key="id"
-            variant="{{activeCategory === item.id ? 'dark' : 'outline'}}" 
-            theme="{{activeCategory === item.id ? 'primary' : 'default'}}" 
-            shape="mark"
-            size="medium"
-            style="margin-right: 16rpx;"
-            bind:tap="setCategory" 
+            wx:key="id" 
+            class="category-item {{activeCategory === item.id ? 'active' : ''}}" 
+            bindtap="setCategory" 
             data-cat="{{item.id}}"
-        >
-            {{item.name}}
-        </t-tag>
-    </view>
+       >
+            <text>{{item.name}}</text>
+       </view>
+       <!-- Right spacer for scroll -->
+       <view style="width: 40rpx; flex-shrink: 0;"></view>
+    </scroll-view>
 
     <view class="wiki-list">
        <view wx:for="{{displayedList}}" wx:key="id" class="wiki-card" bindtap="goToDetail" data-item="{{item}}">
@@ -96,7 +93,11 @@
                 </t-tag>
              </view>
           </view>
-          <t-icon name="chevron-right" size="48rpx" color="#ccc" />
+          
+          <!-- Favorite Heart Button -->
+          <view class="fav-action-btn" catchtap="toggleFavorite" data-id="{{item.id}}" style="padding: 16rpx; margin-right: -16rpx;">
+             <t-icon name="{{item.isFavorited ? 'heart-filled' : 'heart'}}" size="48rpx" color="{{item.isFavorited ? '#FA5151' : '#CCC'}}" />
+          </view>
        </view>
     </view>