feat: 全局用户头像徽章，所有页面右上角统一显示

- 新增 GlobalUserBadge 组件，固定在右上角，已登录显示头像+用户名，未登录显示登录按钮
- 通过 layout.tsx 全局挂载，仅在个人中心页隐藏
- userId.ts 登录/登出时派发 nowhatever_auth 事件，组件实时响应
- 移除各页面重复的用户指示器（首页、极速救场、周末契约大厅、个人中心顶栏退出按钮）
- TopNav 右侧留出空间避免与全局徽章重叠
- 头像徽章采用暗色主题风格（bg-surface/80）

src/components/MatchResult.tsx

@@ -22,7 +22,13 @@ import {
   Heart,
   UserPlus,
 } from "lucide-react";
-import { Restaurant, MatchType, RunnerUp, SceneType, UserProfile } from "@/types";
+import {
+  Restaurant,
+  MatchType,
+  RunnerUp,
+  SceneType,
+  UserProfile,
+} from "@/types";
 import { fireCelebration, playChime } from "@/lib/celebrate";
 import { isRegistered } from "@/lib/userId";
 import ShareCardModal from "@/components/ShareCardModal";
@@ -237,11 +243,14 @@ export default function MatchResult({
     setShowShareCard(true);
   }, []);
 
-  const handleAuth = useCallback((profile: UserProfile) => {
-    setRegistered(true);
-    setShowAuth(false);
-    showToast(`欢迎，${profile.username}！记录已保存`);
-  }, [showToast]);
+  const handleAuth = useCallback(
+    (profile: UserProfile) => {
+      setRegistered(true);
+      setShowAuth(false);
+      showToast(`欢迎，${profile.username}！记录已保存`);
+    },
+    [showToast],
+  );
 
   const handleFavorite = useCallback(async () => {
     if (!registered || favorited || favLoading) return;
@@ -296,7 +305,12 @@ export default function MatchResult({
         <motion.div
           initial={{ scale: 0, rotate: -20 }}
           animate={{ scale: 1, rotate: 0 }}
-          transition={{ type: "spring", stiffness: 200, damping: 12, delay: 0.2 }}
+          transition={{
+            type: "spring",
+            stiffness: 200,
+            damping: 12,
+            delay: 0.2,
+          }}
         >
           {isUnanimous ? (
             <PartyPopper size={56} className="text-emerald-400" />
@@ -311,7 +325,7 @@ export default function MatchResult({
           animate={{ y: 0, opacity: 1 }}
           transition={{ delay: 0.35 }}
         >
-          {isSolo ? "帮你选好了！" : "就去这了！"}
+          {isSolo ? "帮你选好了" : "就去这了"}
         </motion.h1>
 
         <motion.p
@@ -352,7 +366,12 @@ export default function MatchResult({
           className="relative mt-6 w-full overflow-hidden rounded-2xl bg-surface shadow-2xl ring-1 ring-border"
           initial={{ y: 60, opacity: 0 }}
           animate={{ y: 0, opacity: 1 }}
-          transition={{ type: "spring", stiffness: 180, damping: 18, delay: 0.5 }}
+          transition={{
+            type: "spring",
+            stiffness: 180,
+            damping: 18,
+            delay: 0.5,
+          }}
         >
           {registered && (
             <motion.button
@@ -362,11 +381,18 @@ export default function MatchResult({
               whileTap={{ scale: 0.85 }}
               initial={{ scale: 0, opacity: 0 }}
               animate={{ scale: 1, opacity: 1 }}
-              transition={{ delay: 0.7, type: "spring", stiffness: 300, damping: 15 }}
+              transition={{
+                delay: 0.7,
+                type: "spring",
+                stiffness: 300,
+                damping: 15,
+              }}
             >
               <Heart
                 size={18}
-                className={favorited ? "fill-red-500 text-red-500" : "text-white"}
+                className={
+                  favorited ? "fill-red-500 text-red-500" : "text-white"
+                }
               />
             </motion.button>
           )}