feat: 重构 Skill 管理与编辑工作台

- 统一列表、分类、新建与详情页的产品交互

- 提供 Markdown 实时编辑、源码与脚本资源工作台

- 实现能力自动保存、导入导出及完整状态反馈

easyflow-ui-admin/packages/@core/base/design/src/design-tokens/default.css

@@ -85,6 +85,27 @@
   /* Border radius for card, input and buttons */
   --radius: 0.5rem;
 
+  /* Shared workspace and editor rhythm */
+  --space-1: 4px;
+  --space-2: 8px;
+  --space-3: 12px;
+  --space-4: 16px;
+  --space-5: 20px;
+  --space-6: 24px;
+  --space-8: 32px;
+  --radius-control: 10px;
+  --radius-toolbar: 12px;
+  --radius-panel: 16px;
+  --radius-float: 20px;
+  --radius-pill: 999px;
+  --motion-duration-fast: 120ms;
+  --motion-duration-base: 160ms;
+  --motion-duration-medium: 220ms;
+  --motion-duration-slow: 280ms;
+  --motion-ease-standard: cubic-bezier(0.2, 0, 0, 1);
+  --motion-ease-decelerate: cubic-bezier(0.16, 1, 0.3, 1);
+  --motion-ease-accelerate: cubic-bezier(0.3, 0, 1, 1);
+
   /* ============= custom ============= */
 
   /* 遮罩颜色 */

easyflow-ui-admin/packages/@core/base/icons/src/lucide.ts

@@ -28,6 +28,12 @@ export {
   ExternalLink,
   Eye,
   EyeOff,
+  File,
+  FileCode2,
+  FileImage,
+  FileText,
+  FolderClosed,
+  FolderOpen,
   FoldHorizontal,
   Fullscreen,
   Github,
@@ -43,10 +49,10 @@ export {
   LogOut,
   MailCheck,
   Maximize,
-  MessageSquare,
   ArrowRightFromLine as MdiMenuClose,
   ArrowLeftFromLine as MdiMenuOpen,
   Menu,
+  MessageSquare,
   Minimize,
   Minimize2,
   MoonStar,
@@ -67,6 +73,7 @@ export {
   Sun,
   SunMoon,
   SwatchBook,
+  Upload,
   UserRoundPen,
   X,
 } from 'lucide-vue-next';