feat: 添加连锁门店系统首页及核心UI组件

新增首页布局、导航栏、页脚及多个核心UI组件（按钮、卡片、表格等）
添加图片资源、工具函数和样式配置
实现响应式设计和主题支持
包含行业解决方案展示区块

components/ui/avatar.tsx

@@ -0,0 +1,53 @@
+'use client'
+
+import * as React from 'react'
+import * as AvatarPrimitive from '@radix-ui/react-avatar'
+
+import { cn } from '@/lib/utils'
+
+function Avatar({
+  className,
+  ...props
+}: React.ComponentProps<typeof AvatarPrimitive.Root>) {
+  return (
+    <AvatarPrimitive.Root
+      data-slot="avatar"
+      className={cn(
+        'relative flex size-8 shrink-0 overflow-hidden rounded-full',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function AvatarImage({
+  className,
+  ...props
+}: React.ComponentProps<typeof AvatarPrimitive.Image>) {
+  return (
+    <AvatarPrimitive.Image
+      data-slot="avatar-image"
+      className={cn('aspect-square size-full', className)}
+      {...props}
+    />
+  )
+}
+
+function AvatarFallback({
+  className,
+  ...props
+}: React.ComponentProps<typeof AvatarPrimitive.Fallback>) {
+  return (
+    <AvatarPrimitive.Fallback
+      data-slot="avatar-fallback"
+      className={cn(
+        'bg-muted flex size-full items-center justify-center rounded-full',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+export { Avatar, AvatarImage, AvatarFallback }