优化登录流程，添加白名单管理功能，调整页面布局与样式

src/components/ui/input.tsx

@@ -13,7 +13,7 @@ function Input({className, type, ...props}: React.ComponentProps<'input'>) {
         ' placeholder:text-muted-foreground',
         'selection:bg-primary selection:text-primary-foreground',
         'flex rounded-md border bg-transparent px-3 py-1 text-base shadow-xs',
-        'outline-none focus-visible:ring-4 ring-blue-200',
+        'outline-none focus-visible:ring-4 ring-ring/50',
         'disabled:cursor-not-allowed disabled:opacity-50',
         'aria-invalid:ring-destructive/20 aria-invalid:border-destructive dark:aria-invalid:ring-destructive/40 dark:bg-input/30',
         'file:text-foreground file:inline-flex file:h-7 file:border-0 file:bg-transparent file:text-sm file:disabled:pointer-events-none',