refactor(components): 统一使用自定义 IconFont 组件

将所有页面和组件中的 IconFont 导入统一改为使用自定义组件：
- 修改前：import { IconFont } from '@nutui/icons-vue-taro'
- 修改后：import IconFont from '@/components/IconFont.vue'

优点：
1. 统一组件使用方式
2. 方便后续扩展和自定义
3. 集中管理图标属性

涉及文件：
- 所有页面组件（9个）
- 所有公共组件（6个）

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

@@ -75,7 +75,7 @@
 <script setup>
 import { ref, computed, watch } from 'vue'
 import { getFileSize, detectFileType, formatFileSize } from './utils'
-import { IconFont } from '@nutui/icons-vue-taro'
+import IconFont from '@/components/IconFont.vue'
 
 // #ifdef H5
 import OfficeViewer from '../OfficeViewer.vue'

@@ -22,7 +22,7 @@
 <script setup>
 import { ref, onMounted } from 'vue'
 import Taro from '@tarojs/taro'
-import { IconFont } from '@nutui/icons-vue-taro'
+import IconFont from '@/components/IconFont.vue'
 
 defineProps({
   title: {

@@ -39,7 +39,7 @@
 
 <script setup>
 import { ref, computed, watch } from 'vue'
-import { IconFont } from '@nutui/icons-vue-taro'
+import IconFont from '@/components/IconFont.vue'
 import { getTencentPreviewUrl } from '@/components/DocumentPreview/utils'
 
 const props = defineProps({

@@ -44,7 +44,7 @@
 
 <script setup>
 import { ref, watch } from 'vue'
-import { IconFont } from '@nutui/icons-vue-taro'
+import IconFont from '@/components/IconFont.vue'
 
 const props = defineProps({
     show: {

@@ -14,7 +14,7 @@
 </template>
 
 <script setup>
-import { IconFont } from '@nutui/icons-vue-taro'
+import IconFont from '@/components/IconFont.vue'
 
 /**
  * Section Item Component

@@ -30,7 +30,7 @@
 
 <script setup>
 import { ref, shallowRef } from 'vue'
-import { IconFont } from '@nutui/icons-vue-taro'
+import IconFont from '@/components/IconFont.vue'
 import { useGo } from '@/hooks/useGo'
 import Taro from '@tarojs/taro'
 

@@ -36,7 +36,7 @@
 <script setup>
 import { ref } from 'vue'
 import { useGo } from '@/hooks/useGo'
-import { IconFont } from '@nutui/icons-vue-taro'
+import IconFont from '@/components/IconFont.vue'
 import NavHeader from '@/components/NavHeader.vue'
 import Taro from '@tarojs/taro'
 

@@ -64,7 +64,7 @@
 <script setup>
 import { ref, computed } from 'vue'
 import { useGo } from '@/hooks/useGo'
-import { IconFont } from '@nutui/icons-vue-taro'
+import IconFont from '@/components/IconFont.vue'
 import TabBar from '@/components/TabBar.vue'
 import NavHeader from '@/components/NavHeader.vue'
 import Taro from '@tarojs/taro'

@@ -120,7 +120,7 @@
 import { ref } from 'vue'
 import NavHeader from '@/components/NavHeader.vue'
 import TabBar from '@/components/TabBar.vue'
-import { IconFont } from '@nutui/icons-vue-taro'
+import IconFont from '@/components/IconFont.vue'
 
 // Popup 状态
 const showContactPopup = ref(false)

@@ -179,7 +179,7 @@ import { ref, shallowRef } from 'vue';
 import Taro, { useShareAppMessage } from '@tarojs/taro';
 import { useGo } from '@/hooks/useGo';
 import TabBar from '@/components/TabBar.vue';
-import { IconFont } from '@nutui/icons-vue-taro';
+import IconFont from '@/components/IconFont.vue';
 
 // Grid navigation data with routes
 const loopData0 = shallowRef([

@@ -71,7 +71,7 @@
 import { ref } from 'vue'
 import NavHeader from '@/components/NavHeader.vue'
 import TabBar from '@/components/TabBar.vue'
-import { IconFont } from '@nutui/icons-vue-taro'
+import IconFont from '@/components/IconFont.vue'
 import Taro from '@tarojs/taro'
 
 const searchValue = ref('')

@@ -69,7 +69,7 @@
 
 <script setup>
 import { useGo } from '@/hooks/useGo'
-import { IconFont } from '@nutui/icons-vue-taro'
+import IconFont from '@/components/IconFont.vue'
 import TabBar from '@/components/TabBar.vue'
 import NavHeader from '@/components/NavHeader.vue'
 import Taro from '@tarojs/taro'

@@ -86,7 +86,7 @@
 <script setup>
 import { ref, computed } from 'vue'
 import { useGo } from '@/hooks/useGo'
-import { IconFont } from '@nutui/icons-vue-taro'
+import IconFont from '@/components/IconFont.vue'
 import TabBar from '@/components/TabBar.vue'
 import NavHeader from '@/components/NavHeader.vue'
 import Taro from '@tarojs/taro'

@@ -116,7 +116,7 @@
 import { ref } from 'vue'
 import NavHeader from '@/components/NavHeader.vue'
 import TabBar from '@/components/TabBar.vue'
-import { IconFont } from '@nutui/icons-vue-taro'
+import IconFont from '@/components/IconFont.vue'
 import Taro, { useLoad } from '@tarojs/taro'
 
 // 接收页面参数

@@ -113,7 +113,7 @@ import { ref, computed } from 'vue'
 import Taro from '@tarojs/taro'
 import { useGo } from '@/hooks/useGo'
 import NavHeader from '@/components/NavHeader.vue'
-import { IconFont } from '@nutui/icons-vue-taro'
+import IconFont from '@/components/IconFont.vue'
 
 // Navigation
 const go = useGo()