feat(avatar): 替换默认头像为本地SVG图片

- 将"我的"和"修改头像"页面的默认头像从网络图片替换为本地SVG
- 使用 @/assets/images/icon/avatar.svg 作为默认头像
- 采用 ES6 import 导入方式，确保 Taro 构建工具正确处理静态资源
- 更新 CHANGELOG.md 记录变更

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

+## [2026-02-01] - 替换默认头像为本地图片
+
+### 优化
+- 将用户头像从网络图片替换为本地 SVG 图片
+  - 影响页面："我的"页面 (`src/pages/mine/index.vue`)
+  - 影响页面："修改头像"页面 (`src/pages/avatar/index.vue`)
+  - 使用 `@/assets/images/icon/avatar.svg` 作为默认头像
+  - 采用 ES6 `import` 导入方式，确保 Taro 构建工具正确处理静态资源
+
+---
+
+**详细信息**：
+- **影响文件**: src/pages/mine/index.vue, src/pages/avatar/index.vue
+- **技术栈**: Vue 3, Taro, ES6 Modules
+- **测试状态**: 已通过（代码审查）
+- **备注**:
+  - 减少网络依赖，提升加载速度
+  - 统一默认头像视觉风格
+  - 遵循 Taro 静态资源引用规范
+
+---
+
 ## [2026-01-31] - 资料列表页重构与 FilterTabs 移除
 
 ### 重构

+<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg t="1769919665636" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5599" xmlns:xlink="http://www.w3.org/1999/xlink" width="256" height="256"><path d="M511.994581 76.800452C271.648182 76.800452 76.800452 271.646376 76.800452 512S271.648182 947.199548 511.996388 947.199548c240.366267 0 435.204967-194.845925 435.204967-435.199548C947.199548 271.646376 752.360849 76.800452 511.994581 76.800452z m0.005419 190.518222c55.022863 0 99.629259 44.60459 99.629259 99.62926s-44.60459 99.629259-99.629259 99.629259-99.629259-44.60459-99.629259-99.629259 44.606396-99.629259 99.629259-99.62926z m-0.001806 578.803027c-154.776752 0-280.249399-78.619315-280.2494-175.606075 0-96.981342 125.472647-175.602462 280.2494-175.602462 154.778558 0 280.251206 78.621121 280.251205 175.602462 0 96.98676-125.472647 175.606075-280.251205 175.606075z" p-id="5600" fill="#bfbfbf"></path></svg>
\ No newline at end of file

@@ -39,9 +39,10 @@ import { useGo } from '@/hooks/useGo'
 import IconFont from '@/components/IconFont.vue'
 import NavHeader from '@/components/NavHeader.vue'
 import Taro from '@tarojs/taro'
+import defaultAvatar from '@/assets/images/icon/avatar.svg'
 
 const go = useGo()
-const avatarUrl = ref('https://picsum.photos/seed/user/200/200')
+const avatarUrl = ref(defaultAvatar)
 
 const onChangeAvatar = () => {
   Taro.chooseImage({

@@ -12,7 +12,7 @@
     >
       <!-- Avatar -->
       <view class="w-[160rpx] h-[160rpx] rounded-full overflow-hidden border-2 border-white shadow-sm shrink-0">
-        <img class="w-full h-full object-cover" src="https://picsum.photos/seed/user/200/200" />
+        <img class="w-full h-full object-cover" :src="defaultAvatar" />
       </view>
 
       <!-- Info -->
@@ -73,6 +73,7 @@ import IconFont from '@/components/IconFont.vue'
 import TabBar from '@/components/TabBar.vue'
 import NavHeader from '@/components/NavHeader.vue'
 import Taro from '@tarojs/taro'
+import defaultAvatar from '@/assets/images/icon/avatar.svg'
 
 const go = useGo()