fix: 单人场景体验优化 — 跳过等待 spinner，适配结果文案

- SwipeDeck: userCount === 1 时不再显示"等待其他人完成选择"
- MatchResult: 单人时标题改为"帮你选好了"，副标题改为"你的首选"
- MatchResult: 单人时隐藏"默契度 100%"徽章（无意义）
- 更新 ROADMAP 将 Solo 模式改为单人体验修复

src/components/MatchResult.tsx

@@ -189,6 +189,7 @@ export default function MatchResult({
   const [toast, setToast] = useState("");
   const celebratedRef = useRef(false);
   const historySavedRef = useRef(false);
+  const isSolo = userCount <= 1;
   const isUnanimous = matchType === "unanimous";
   const [favorited, setFavorited] = useState(false);
   const [favLoading, setFavLoading] = useState(false);
@@ -300,7 +301,7 @@ export default function MatchResult({
           animate={{ y: 0, opacity: 1 }}
           transition={{ delay: 0.35 }}
         >
-          就去这了！
+          {isSolo ? "帮你选好了！" : "就去这了！"}
         </motion.h1>
 
         <motion.p
@@ -309,12 +310,14 @@ export default function MatchResult({
           animate={{ y: 0, opacity: 1 }}
           transition={{ delay: 0.45 }}
         >
-          {isUnanimous
-            ? "大家一拍即合！"
-            : `${matchLikes}/${userCount} 人想去这家`}
+          {isSolo
+            ? "你的首选，别犹豫了"
+            : isUnanimous
+              ? "大家一拍即合！"
+              : `${matchLikes}/${userCount} 人想去这家`}
         </motion.p>
 
-        {isUnanimous && (
+        {isUnanimous && !isSolo && (
           <motion.div
             className="mt-3 flex items-center gap-2 rounded-full bg-emerald-500/15 px-4 py-1.5 ring-1 ring-emerald-500/30"
             initial={{ scale: 0, opacity: 0 }}

src/components/SwipeDeck.tsx

@@ -319,7 +319,7 @@ export default function SwipeDeck({
     ? restaurants.find((r) => r.id === resolvedMatchId) ?? null
     : null;
 
-  const showWaiting = allSwiped && !resolvedMatchId;
+  const showWaiting = allSwiped && !resolvedMatchId && userCount > 1;
 
   return (
     <>