feat(frontend): 统一界面图标体系

frontend/src/services/skillService.ts

@@ -49,7 +49,7 @@ export const mockSkills: Skill[] = [
     name: '期末复习助手',
     version: '1.0.0',
     description: '根据课程笔记生成复习要点和练习题，帮助高效备考',
-    icon: '📚',
+    icon: '',
     author: '知笔知己团队',
     permissions: ['notes.search', 'notes.read', 'tasks.create'],
     tools: ['notes.search', 'notes.read', 'tasks.create'],
@@ -63,7 +63,7 @@ export const mockSkills: Skill[] = [
     name: '会议纪要生成',
     version: '1.1.0',
     description: '从音频或文本中提取会议要点、行动项和待办任务',
-    icon: '📝',
+    icon: '',
     author: '知笔知己团队',
     permissions: ['notes.search', 'notes.write', 'tasks.write', 'attachments.read'],
     tools: ['notes.search', 'notes.create', 'tasks.create', 'attachments.read'],
@@ -77,7 +77,7 @@ export const mockSkills: Skill[] = [
     name: '代码解读助手',
     version: '0.9.0',
     description: '分析代码片段，解释功能、复杂度和优化建议',
-    icon: '💻',
+    icon: '',
     author: '社区贡献',
     permissions: ['notes.search', 'notes.read'],
     tools: ['notes.search', 'notes.read', 'rag.search'],
@@ -91,7 +91,7 @@ export const mockSkills: Skill[] = [
     name: '文献研究助手',
     version: '1.2.0',
     description: '自动整理文献笔记，生成研究综述和引用关系图',
-    icon: '🔬',
+    icon: '',
     author: '社区贡献',
     permissions: ['notes.search', 'notes.read', 'notes.write'],
     tools: ['notes.search', 'notes.read', 'notes.create', 'rag.search'],
@@ -106,7 +106,7 @@ export const mockSkills: Skill[] = [
     name: '语言学习助手',
     version: '0.5.0',
     description: '基于你的学习笔记生成语言练习和记忆卡片',
-    icon: '🌍',
+    icon: '',
     author: '社区贡献',
     permissions: ['notes.search', 'notes.read', 'tasks.create'],
     tools: ['notes.search', 'notes.read', 'tasks.create'],