feat: add Claude AI skills for shadcn theming and image generation tools

This commit introduces comprehensive Claude AI skill configurations for:
- shadcn/ui theming with OKLCH color space support
- Gemini API integration for image generation and chat capabilities
- Batch processing and multi-turn conversation features
- File handling utilities for image processing workflows

frontend/app/web-gold/src/layouts/MainLayout.vue

@@ -12,7 +12,7 @@ import SidebarNav from '@/components/SidebarNav.vue'
     <TopNav />
     <div class="flex flex-1 pt-[70px]">
       <SidebarNav />
-      <main class="flex-1 h-[calc(100vh-70px)] overflow-auto p-4">
+      <main class="flex-1 h-[calc(100vh-70px)] overflow-auto">
         <RouterView v-slot="{ Component }">
           <keep-alive>
             <component :is="Component" />