init: 毛孩子计划 小程序 + Go 后端 + 内嵌后台

- pets-fe: 微信原生小程序（首页/计划/记录/报告/社区/引导），
  服务端驱动、无假数据；弹层改用 scroll-view，打开时隐藏自定义 tabBar
- pets-be: Gin + GORM(MySQL, sundynix_ 前缀) + MinIO，统一响应/分页，
  微信 code2session 登录，provider-neutral AI(DeepSeek)，go:embed React 后台
- 修复：分段选择类型不匹配（字符串 vs 数字）导致选不中

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

pets-be/web/admin/src/components/ui/dialog.tsx

@@ -0,0 +1,41 @@
+import * as React from 'react'
+import * as DialogPrimitive from '@radix-ui/react-dialog'
+import { X } from 'lucide-react'
+import { cn } from '@/lib/utils'
+
+const Dialog = DialogPrimitive.Root
+const DialogTrigger = DialogPrimitive.Trigger
+const DialogClose = DialogPrimitive.Close
+
+const DialogContent = React.forwardRef<
+  React.ElementRef<typeof DialogPrimitive.Content>,
+  React.ComponentPropsWithoutRef<typeof DialogPrimitive.Content>
+>(({ className, children, ...props }, ref) => (
+  <DialogPrimitive.Portal>
+    <DialogPrimitive.Overlay className="fixed inset-0 z-50 bg-black/40 data-[state=open]:animate-in data-[state=closed]:animate-out" />
+    <DialogPrimitive.Content
+      ref={ref}
+      className={cn(
+        'fixed left-1/2 top-1/2 z-50 grid w-full max-w-lg -translate-x-1/2 -translate-y-1/2 gap-4 border bg-card p-6 shadow-lg rounded-xl',
+        className,
+      )}
+      {...props}
+    >
+      {children}
+      <DialogPrimitive.Close className="absolute right-4 top-4 opacity-70 hover:opacity-100">
+        <X className="h-4 w-4" />
+      </DialogPrimitive.Close>
+    </DialogPrimitive.Content>
+  </DialogPrimitive.Portal>
+))
+DialogContent.displayName = 'DialogContent'
+
+function DialogHeader({ className, ...props }: React.HTMLAttributes<HTMLDivElement>) {
+  return <div className={cn('flex flex-col space-y-1.5', className)} {...props} />
+}
+
+function DialogTitle({ className, ...props }: React.HTMLAttributes<HTMLHeadingElement>) {
+  return <h2 className={cn('text-lg font-semibold', className)} {...props} />
+}
+
+export { Dialog, DialogTrigger, DialogClose, DialogContent, DialogHeader, DialogTitle }