refactor: complete system overhaul with new design

Rebuilt user and match pages, simplified login, and updated bottom navigation.

#VERCEL_SKIP

Co-authored-by: undefined <undefined+undefined@users.noreply.github.com>

components/layout/bottom-nav.tsx

@@ -0,0 +1,47 @@
+"use client"
+
+import Link from "next/link"
+import { usePathname } from "next/navigation"
+import { Home, Users, User } from "lucide-react"
+
+export function BottomNav() {
+  const pathname = usePathname()
+
+  // 管理后台不显示底部导航
+  if (pathname.startsWith("/admin")) return null
+
+  const navItems = [
+    { href: "/", icon: Home, label: "首页", id: "home" },
+    { href: "/match", icon: Users, label: "匹配合作", id: "match" },
+    { href: "/my", icon: User, label: "我的", id: "my" },
+  ]
+
+  const isActive = (href: string) => {
+    if (href === "/") return pathname === "/"
+    return pathname.startsWith(href)
+  }
+
+  return (
+    <nav className="fixed bottom-0 left-0 right-0 z-50 bg-[#0a0a0a]/95 backdrop-blur-xl border-t border-white/5 safe-area-bottom">
+      <div className="flex items-center justify-around h-16 max-w-lg mx-auto">
+        {navItems.map((item) => {
+          const active = isActive(item.href)
+          const Icon = item.icon
+
+          return (
+            <Link
+              key={item.id}
+              href={item.href}
+              className={`flex flex-col items-center justify-center w-20 h-full transition-colors ${
+                active ? "text-[#ff3b5c]" : "text-white/40"
+              }`}
+            >
+              <Icon className={`w-6 h-6 mb-1 ${active ? "stroke-[2.5]" : ""}`} />
+              <span className="text-xs font-medium">{item.label}</span>
+            </Link>
+          )
+        })}
+      </div>
+    </nav>
+  )
+}