完善文档与前端迁移，补充开源协议

web/src/components/ui/badge.tsx

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+import * as React from "react";
+import { cva, type VariantProps } from "class-variance-authority";
+
+import { cn } from "@/lib/utils";
+
+const badgeVariants = cva(
+  "inline-flex items-center rounded-full border px-2.5 py-1 text-xs font-medium transition-colors",
+  {
+    variants: {
+      variant: {
+        default: "border-transparent bg-primary/12 text-primary",
+        secondary: "border-transparent bg-secondary text-secondary-foreground",
+        outline: "border-border text-foreground",
+        success: "border-transparent bg-success/15 text-success",
+        warning: "border-transparent bg-warning/20 text-warning",
+        destructive: "border-transparent bg-destructive/15 text-destructive"
+      }
+    },
+    defaultVariants: {
+      variant: "default"
+    }
+  }
+);
+
+export interface BadgeProps
+  extends React.HTMLAttributes<HTMLDivElement>,
+    VariantProps<typeof badgeVariants> {}
+
+function Badge({ className, variant, ...props }: BadgeProps) {
+  return <div className={cn(badgeVariants({ variant }), className)} {...props} />;
+}
+
+export { Badge, badgeVariants };