feat: rename Skill 市场 to 技能中心 with Star icon

frontend/src/components/SidebarNav.vue

@@ -1,7 +1,7 @@
 <script setup lang="ts">
 import { useRouter, useRoute } from 'vue-router'
 import { useAuthStore } from '@/stores/auth'
-import { MessageCircle, BookOpen, Network, LayoutGrid, MessageSquare, LogOut, Cpu, Bot, Activity, CheckSquare, Settings } from 'lucide-vue-next'
+import { MessageCircle, BookOpen, Network, LayoutGrid, MessageSquare, LogOut, Cpu, Bot, Activity, CheckSquare, Settings, Star } from 'lucide-vue-next'
 
 const router = useRouter()
 const route = useRoute()
@@ -10,7 +10,7 @@ const auth = useAuthStore()
 const navItems = [
   { name: '沟通系统', path: '/chat', icon: MessageCircle },
   { name: '智能链路', path: '/agents', icon: Bot },
-  { name: 'Skill 市场', path: '/skills', icon: Bot },
+  { name: '技能中心', path: '/skills', icon: Star },
   { name: '资料中枢', path: '/knowledge', icon: BookOpen },
   { name: '知识大脑', path: '/graph', icon: Network },
   { name: '任务矩阵', path: '/kanban', icon: LayoutGrid },

frontend/src/views/SkillView.vue

@@ -177,7 +177,7 @@ onMounted(fetchSkills)
     <div class="view-header">
       <div class="header-title">
         <span class="title-bracket">[</span>
-        <span class="title-text">SKILL MANAGEMENT</span>
+        <span class="title-text">技能中心</span>
         <span class="title-bracket">]</span>
       </div>
       <div class="header-actions">
@@ -186,7 +186,7 @@ onMounted(fetchSkills)
         </button>
         <button class="btn-add" @click="openCreateModal">
           <Plus :size="14" />
-          <span>New Skill</span>
+          <span>新建技能</span>
         </button>
       </div>
     </div>
@@ -261,7 +261,7 @@ onMounted(fetchSkills)
       <div v-if="modalOpen" class="modal-overlay" @click.self="closeModal">
         <div class="modal-card">
           <div class="modal-header">
-            <span class="modal-title">{{ editingSkill ? '// EDIT SKILL' : '// NEW SKILL' }}</span>
+            <span class="modal-title">{{ editingSkill ? '// 编辑技能' : '// 新建技能' }}</span>
             <button class="btn-close" @click="closeModal"><X :size="16" /></button>
           </div>
           <div class="modal-body">