feat: 整体页面优化，删除无用svg

pages/tasks/index.wxml

@@ -44,7 +44,7 @@
       <t-button theme="primary" size="large" shape="round" bind:tap="gotoGarden" class="empty-btn">去看看花园</t-button>
     </view>
 
-    <scroll-view wx:else scroll-y class="task-list" enhanced show-scrollbar="{{false}}">
+    <scroll-view wx:else scroll-y class="task-list" enhanced show-scrollbar="{{false}}" scroll-top="{{scrollTop}}">
       <view wx:for="{{groupedTasks}}" wx:key="plantName" class="plant-task-card {{item.hasOverdue ? 'has-overdue' : ''}}">
         <view class="card-header-row">
           <view class="plant-info-brief">
@@ -85,7 +85,7 @@
   </view>
 
   <!-- Complete Task Popup -->
-  <t-popup visible="{{completingTask}}" bind:visible-change="onPopupVisibleChange" placement="center">
+  <t-popup visible="{{completingTask}}" bind:visible-change="onPopupVisibleChange" placement="center" close-on-overlay-click="{{false}}">
     <view class="modal-card">
       <view class="modal-header">
         <text class="modal-title">确认完成任务</text>
@@ -110,7 +110,7 @@
           <text class="remark-label">添加记录备注 (可选)</text>
           <textarea 
             class="remark-input" 
-            placeholder="例如：浇了500ml水..." 
+            placeholder="{{remarkPlaceholder}}" 
             value="{{remark}}" 
             bindinput="onRemarkInput"
             fixed="{{true}}"
@@ -131,6 +131,48 @@
     </view>
   </t-popup>
 
+  <!-- Level Up Modal -->
+  <t-popup visible="{{showLevelUpModal}}" bind:visible-change="closeLevelUpModal" placement="center" close-on-overlay-click="{{false}}">
+    <view class="reward-modal">
+      <view class="reward-floating-icon level-icon-bg">
+         <t-icon name="chart-bar" size="80rpx" color="#fff" />
+      </view>
+      <view class="reward-content">
+        <text class="reward-title">恭喜升级！</text>
+        <view class="reward-level-tag">
+            <text>Lv.{{levelUpData.level}} {{levelUpData.title}}</text>
+        </view>
+        <view class="reward-desc-box" wx:if="{{levelUpData.perks}}">
+            <text style="font-weight: bold; display: block; margin-bottom: 8rpx; color: #EF6C00;">解锁特权</text>
+            <text>{{levelUpData.perks}}</text>
+        </view>
+      </view>
+      <view class="reward-btn-container">
+        <t-button t-class="reward-btn btn-level" size="large" block bindtap="closeLevelUpModal">太棒了</t-button>
+      </view>
+    </view>
+  </t-popup>
+
+  <!-- New Badge Modal -->
+  <t-popup visible="{{showBadgeModal}}" bind:visible-change="closeBadgeModal" placement="center" close-on-overlay-click="{{false}}">
+    <view class="reward-modal">
+      <view class="reward-floating-icon badge-icon-bg">
+        <image class="reward-badge-img-large" src="{{badgeData.icon.url}}" mode="aspectFit" wx:if="{{badgeData.icon && badgeData.icon.url}}" />
+        <t-icon name="medal" size="80rpx" color="#fff" wx:else />
+      </view>
+      <view class="reward-content">
+        <text class="reward-title">解锁新徽章！</text>
+        <text class="reward-level-tag" style="background: #E3F2FD; color: #1565C0; border-color: #BBDEFB;">{{badgeData.name}}</text>
+        <view class="reward-desc-box">
+            <text>{{badgeData.description}}</text>
+        </view>
+      </view>
+      <view class="reward-btn-container">
+        <t-button t-class="reward-btn btn-badge" size="large" block bindtap="closeBadgeModal">收入囊中</t-button>
+      </view>
+    </view>
+  </t-popup>
+
   <!-- Sunshine Animation Layer -->
   <view class="sunshine-layer" wx:if="{{showSunshine}}">
     <view class="sunshine-pkg">