style: 全局 UI 主题皮肤重构与样式模块化

引入 Element Plus 主题定制和主题皮肤 composable，将全局
样式拆分为组件级独立 CSS 文件（侧边栏、顶栏、工作台等），
统一色彩变量和间距规范，重构所有视图和组件样式以适配新
主题系统，优化图表和知识图谱组件视觉表现，提取审计和差
旅报销相关子组件。

web/package.json

@@ -1,27 +1,27 @@
-{
-  "name": "x-financial-reimbursement-admin",
-  "private": true,
-  "version": "0.1.0",
-  "type": "module",
-  "scripts": {
-    "start": "vite --host 0.0.0.0",
-    "dev": "vite --host 0.0.0.0",
-    "build": "vite build",
-    "preview": "vite preview --host 0.0.0.0"
-  },
-  "dependencies": {
-    "@antv/g6": "^5.1.1",
-    "@primevue/themes": "^4.5.4",
-    "@vitejs/plugin-vue": "^5.2.4",
-    "@vueuse/motion": "^3.0.3",
-    "chart.js": "^4.5.1",
-    "markdown-it": "^14.1.1",
-    "pg": "^8.13.1",
-    "primeicons": "^7.0.0",
-    "primevue": "^4.5.5",
-    "vite": "^5.4.19",
-    "vue": "^3.5.13",
-    "vue-chartjs": "^5.3.3",
-    "vue-router": "^4.5.1"
-  }
-}
+{
+  "name": "x-financial-reimbursement-admin",
+  "private": true,
+  "version": "0.1.0",
+  "type": "module",
+  "scripts": {
+    "start": "vite --host 0.0.0.0",
+    "dev": "vite --host 0.0.0.0",
+    "build": "vite build",
+    "preview": "vite preview --host 0.0.0.0"
+  },
+  "dependencies": {
+    "@antv/g6": "^5.1.1",
+    "@element-plus/icons-vue": "^2.3.2",
+    "@vitejs/plugin-vue": "^5.2.4",
+    "@vueuse/motion": "^3.0.3",
+    "chart.js": "^4.5.1",
+    "element-plus": "^2.14.0",
+    "markdown-it": "^14.1.1",
+    "pg": "^8.13.1",
+    "primeicons": "^7.0.0",
+    "vite": "^5.4.19",
+    "vue": "^3.5.13",
+    "vue-chartjs": "^5.3.3",
+    "vue-router": "^4.5.1"
+  }
+}