#978 safe-align: 固化 frontend-v2 空白页修复真相源

- 新增 frontend-v2/ 为生产前端真相源（此前仅容器 dist，未入 git）
- vite.config.ts: minify:false 根治压缩器压坏 react-router 6.28 (o.slice)
- useApi.ts: asArray select 防御非裸数组返回值
- LandingPage/AppServices: Array.isArray coerce 双重防御 (apps.slice)
- 关联: INCIDENT-2026-08-23-blank-page.md / SOP-FRONTEND-ITERATIVE-DEVELOPMENT.md
- 公网验证通过 2026-08-23 09:31 (DOM 24493B, 无 slice 错误)

frontend-v2/src/components/ui/tooltip.tsx

@@ -0,0 +1,21 @@
+import * as React from 'react';
+import * as TooltipPrimitive from '@radix-ui/react-tooltip';
+import { cn } from '@/lib/utils';
+
+const TooltipProvider = TooltipPrimitive.Provider;
+const Tooltip = TooltipPrimitive.Root;
+const TooltipTrigger = TooltipPrimitive.Trigger;
+
+const TooltipContent = React.forwardRef<React.ComponentRef<typeof TooltipPrimitive.Content>, React.ComponentPropsWithoutRef<typeof TooltipPrimitive.Content>>(
+  ({ className, sideOffset = 4, ...props }, ref) => (
+    <TooltipPrimitive.Content
+      ref={ref}
+      sideOffset={sideOffset}
+      className={cn('z-50 overflow-hidden rounded-md border bg-popover px-3 py-1.5 text-sm text-popover-foreground shadow-md animate-in fade-in-0 zoom-in-95 data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=closed]:zoom-out-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2', className)}
+      {...props}
+    />
+  )
+);
+TooltipContent.displayName = TooltipPrimitive.Content.displayName;
+
+export { Tooltip, TooltipTrigger, TooltipContent, TooltipProvider };