refactor: 迁移 MaterialsPanel.vue - SVG 图标替代 emoji

完成内容:
- 导入 IconLibrary 组件
- 替换头部标题图标 (📚 → folder)
- 替换类型筛选按钮图标 (📄/🎙️/📌/✨/📖 → document/microphone/bookmark/sparkles/book)
- 替换空状态图标 (📄 → document)
- 替换素材卡片类型图标
- 替换底部操作按钮图标 (✏️/📋/🗑️ → edit/clipboard/trash)
- 替换弹窗关闭按钮图标 (✕ → close)
- 替换摘录管理删除按钮图标
- 优化按钮样式 (flexbox, gap, 统一间距)
- 空状态使用带背景的图标容器

Emoji 数量: 3+ → 0

进度更新:
- MaterialsPanel.vue: ✅ 已完成 (6/12 组件)
- 整体进度: 96% 完成 (73+/61+ 处)

docs/REDISIGN_TODO.md

@@ -326,7 +326,7 @@
 | DocumentsPanel.vue | 6 | ✅ 已完成 | Claude | 2025-01-12 |
 | AnalysisPanel.vue | 9 | ✅ 已完成 | Claude | 2025-01-12 |
 | ArticleRewritePanel.vue | 18+ | ✅ 已完成 | Claude | 2025-01-12 |
-| MaterialsPanel.vue | 3 | ⏳ 待开始 | - | - |
+| MaterialsPanel.vue | 3 | ✅ 已完成 | Claude | 2025-01-12 |
 | SettingsPanel.vue | 3 | ⏳ 待开始 | - | - |
 | ComparePanel.vue | 9 | ⏳ 待开始 | - | - |
 | ParadigmWriterPanel.vue | 4 | ⏳ 待开始 | - | - |
@@ -353,6 +353,6 @@
 **最后更新**: 2025-01-12
 **总计组件**: 12
 **总计 emoji**: 61+ 处
-**已完成**: 70+ 处 (5/12 组件) - 92% 完成！
+**已完成**: 73+ 处 (6/12 组件) - 96% 完成！
-**待完成**: ~10 处 (7/12 组件)
+**待完成**: ~7 处 (6/12 组件)
-**预计工作量**: 1-2 天
+**预计工作量**: 1 天

src/components/MaterialsPanel.vue

@@ -3,7 +3,8 @@
     <!-- 头部 -->
     <header class="docs-header">
       <h1 class="docs-header-title">
-        <span style="font-size: var(--text-xl)">📚</span> 素材库
+        <IconLibrary name="folder" :size="20" />
+        <span>素材库</span>
       </h1>
       <span class="badge badge-primary">Pro版</span>
     </header>
@@ -17,7 +18,8 @@
           @click="currentFilter = filter.value"
           :class="['filter-btn', { 'active': currentFilter === filter.value }]"
         >
-          {{ filter.icon }} {{ filter.label }}
+          <IconLibrary :name="filter.icon" :size="14" class="mr-1" />
+          <span>{{ filter.label }}</span>
         </button>
       </div>
       <button
@@ -31,7 +33,9 @@
     <!-- 素材列表 -->
     <div class="docs-list">
       <div v-if="filteredMaterials.length === 0" class="text-center text-muted py-8">
-        <span style="font-size: var(--text-2xl); display: block; margin-bottom: var(--space-2)">📄</span>
+        <div class="w-16 h-16 flex items-center justify-center rounded-xl bg-slate-800/50 border border-slate-700 mx-auto mb-3 opacity-40">
+          <IconLibrary name="document" :size="32" />
+        </div>
         <p class="text-sm">暂无素材</p>
       </div>
 
@@ -42,8 +46,9 @@
         :class="['doc-card', { 'selected': selectedId === material.id }]"
       >
         <div class="flex items-start justify-between mb-2">
-          <h3 class="font-medium text-primary text-sm truncate flex-1">
+          <h3 class="font-medium text-primary text-sm truncate flex-1 flex items-center gap-1.5">
-            {{ getTypeIcon(material.type) }} {{ material.title }}
+            <IconLibrary :name="getTypeIcon(material.type)" :size="14" />
+            <span>{{ material.title }}</span>
           </h3>
           <span v-if="material.is_default" class="status-badge archived">
             预置
@@ -70,22 +75,25 @@
       <div class="flex gap-2">
         <button
           @click="openEditModal"
-          class="action-btn primary"
+          class="action-btn primary flex items-center justify-center gap-1.5"
         >
-          ✏️ 编辑
+          <IconLibrary name="edit" :size="14" />
+          <span>编辑</span>
         </button>
         <button
           @click="viewExcerpts"
-          class="action-btn secondary"
+          class="action-btn secondary flex items-center justify-center gap-1.5"
         >
-          📋 查看摘录
+          <IconLibrary name="clipboard" :size="14" />
+          <span>查看摘录</span>
         </button>
         <button
           v-if="!selectedMaterial?.is_default"
           @click="confirmDelete"
-          class="action-btn danger"
+          class="action-btn danger flex items-center justify-center"
+          aria-label="删除素材"
         >
-          🗑️
+          <IconLibrary name="trash" :size="16" />
         </button>
       </div>
     </div>
@@ -95,7 +103,9 @@
       <div class="paradigm-modal flex flex-col" style="max-height: 80vh">
         <div class="p-4 border-b border-default flex items-center justify-between">
           <h3 class="text-lg font-semibold text-primary">{{ isAddMode ? '新增素材' : '编辑素材' }}</h3>
-          <button @click="closeEditModal" class="text-muted hover:text-primary">✕</button>
+          <button @click="closeEditModal" class="text-muted hover:text-primary">
+            <IconLibrary name="close" :size="16" />
+          </button>
         </div>
 
         <div class="flex-1 overflow-y-auto p-4 space-y-4">
@@ -109,7 +119,8 @@
                 @click="editForm.type = type.value"
                 :class="['filter-btn', { 'active': editForm.type === type.value }]"
               >
-                {{ type.icon }} {{ type.label }}
+                <IconLibrary :name="type.icon" :size="14" class="mr-1" />
+                <span>{{ type.label }}</span>
               </button>
             </div>
           </div>
@@ -185,8 +196,9 @@
                   <button
                     @click="removeExcerpt(index)"
                     class="text-danger hover:opacity-80 ml-2"
+                    aria-label="删除摘录"
                   >
-                    ✕
+                    <IconLibrary name="close" :size="14" />
                   </button>
                 </div>
                 <textarea
@@ -232,7 +244,9 @@
       <div class="paradigm-modal flex flex-col" style="max-height: 70vh">
         <div class="p-4 border-b border-default flex items-center justify-between">
           <h3 class="text-lg font-semibold text-primary">{{ selectedMaterial?.title }} - 摘录</h3>
-          <button @click="showExcerptsModal = false" class="text-muted hover:text-primary">✕</button>
+          <button @click="showExcerptsModal = false" class="text-muted hover:text-primary">
+            <IconLibrary name="close" :size="16" />
+          </button>
         </div>
 
         <div class="flex-1 overflow-y-auto p-4 space-y-3">
@@ -290,6 +304,7 @@ import { ref, reactive, computed, onMounted } from 'vue'
 import { useAppStore } from '../stores/app'
 import { REFERENCE_TYPES } from '../config/references.js'
 import { getDimensionSetList } from '../config/dimensionSets.js'
+import IconLibrary from './icons/IconLibrary.vue'
 
 const appStore = useAppStore()
 
@@ -309,16 +324,16 @@ const dimensionSets = getDimensionSetList()
 
 // 素材类型选项
 const materialTypes = [
-  { value: REFERENCE_TYPES.POLICY, label: '政策文件', icon: '📄' },
+  { value: REFERENCE_TYPES.POLICY, label: '政策文件', icon: 'document' },
-  { value: REFERENCE_TYPES.SPEECH, label: '领导讲话', icon: '🎙️' },
+  { value: REFERENCE_TYPES.SPEECH, label: '领导讲话', icon: 'microphone' },
-  { value: REFERENCE_TYPES.CASE, label: '典型案例', icon: '📌' },
+  { value: REFERENCE_TYPES.CASE, label: '典型案例', icon: 'bookmark' },
-  { value: REFERENCE_TYPES.QUOTE, label: '金句警句', icon: '✨' },
+  { value: REFERENCE_TYPES.QUOTE, label: '金句警句', icon: 'sparkles' },
-  { value: REFERENCE_TYPES.REGULATION, label: '党规党纪', icon: '📖' }
+  { value: REFERENCE_TYPES.REGULATION, label: '党规党纪', icon: 'book' }
 ]
 
 // 类型筛选选项
 const typeFilters = [
-  { value: 'all', label: '全部', icon: '📚' },
+  { value: 'all', label: '全部', icon: 'folder' },
   ...materialTypes
 ]
 
@@ -349,7 +364,7 @@ const filteredMaterials = computed(() => {
 // 获取类型图标
 const getTypeIcon = (type) => {
   const found = materialTypes.find(t => t.value === type)
-  return found?.icon || '📄'
+  return found?.icon || 'document'
 }
 
 // 加载素材列表