fix: 修复反馈页面 textarea 样式问题

- 将 NutUI textarea 替换为原生 textarea 组件
- 原生组件可完全控制 padding、字体等样式
- 手动实现字符计数功能（右下角显示）
- 修复 help-center 图标名称和文案

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

 <!--
  * @Date: 2026-01-29 22:26:13
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2026-01-30 21:36:29
+ * @LastEditTime: 2026-01-31 14:40:32
  * @FilePath: /manulife-weapp/src/pages/feedback/index.vue
  * @Description: 文件描述
 -->
@@ -26,17 +26,19 @@
       </view>
 
       <!-- Description -->
-      <view class="bg-white rounded-[24rpx] p-[32rpx] mb-[24rpx] shadow-sm">
+      <view class="bg-white rounded-[24rpx] p-[28rpx] mb-[24rpx] shadow-sm">
         <view class="text-[30rpx] font-bold text-gray-900 mb-[24rpx]">问题描述</view>
-        <view class="border border-[#E5E7EB] rounded-[16rpx] overflow-hidden">
-          <nut-textarea
+        <view class="feedback-textarea-wrapper border border-[#E5E7EB] rounded-[16rpx] overflow-hidden relative">
+          <textarea
             v-model="description"
             placeholder="请详细描述您遇到的问题或建议..."
-            :rows="4"
-            limit-show
-            max-length="200"
-            class="!p-[24rpx] !text-[28rpx] !border-none w-full"
+            :maxlength="200"
+            class="w-full h-[240rpx] p-[24rpx] text-[28rpx] leading-normal bg-transparent resize-none"
+            auto-height
           />
+          <view class="absolute bottom-[16rpx] right-[24rpx] text-[22rpx] text-gray-400">
+            {{ description.length }}/200
+          </view>
         </view>
       </view>
 
@@ -101,3 +103,6 @@ const onSubmit = () => {
   }, 1000)
 }
 </script>
+
+<style lang="less">
+</style>

@@ -23,7 +23,7 @@
           <text class="text-[32rpx] text-gray-900 font-medium">联系客服</text>
         </view>
         <view class="z-10">
-          <IconFont name="rectRight" class="text-gray-400" size="16" />
+          <IconFont name="rect-right" class="text-gray-400" size="16" />
         </view>
       </view>
 
@@ -139,8 +139,8 @@ const contactMethods = [
   {
     icon: 'service',
     label: '微信公众号',
-    value: '美乐爱觉',
-    desc: '搜索"美乐爱觉"关注我们',
+    value: 'manulife',
+    desc: '搜索"manulife"关注我们',
     color: '#16A34A' // green-600
   },
   {