fix: 外部 API 错误处理 + 导航 URL 校验 + reset/narrow 错误反馈

- #22: 高德 API fetch 加 try/catch，失败返回 503 而非泛化 500
- #23: buildNavUrl 校验 location.split(",") 结果长度和非空
- #24: handleReset/handleNarrow 检查 res.ok，失败时 toast 提示

src/app/api/location/regeo/route.ts

@@ -15,8 +15,13 @@ export const GET = apiHandler(async (req) => {
   url.searchParams.set("location", `${lng},${lat}`);
   url.searchParams.set("extensions", "base");
 
-  const res = await fetch(url.toString());
-  const data = await res.json();
+  let data;
+  try {
+    const res = await fetch(url.toString());
+    data = await res.json();
+  } catch {
+    throw new ApiError("位置服务暂时不可用，请稍后重试", 503);
+  }
 
   if (data.status !== "1" || !data.regeocode) {
     return NextResponse.json({ name: null });

src/app/api/location/suggest/route.ts

@@ -1,5 +1,5 @@
 import { NextResponse } from "next/server";
-import { apiHandler } from "@/lib/api";
+import { apiHandler, ApiError } from "@/lib/api";
 import { requireAmapApiKey } from "@/lib/amap";
 
 export const GET = apiHandler(async (req) => {
@@ -13,8 +13,13 @@ export const GET = apiHandler(async (req) => {
   url.searchParams.set("keywords", keywords);
   url.searchParams.set("datatype", "poi");
 
-  const res = await fetch(url.toString());
-  const data = await res.json();
+  let data;
+  try {
+    const res = await fetch(url.toString());
+    data = await res.json();
+  } catch {
+    throw new ApiError("位置服务暂时不可用，请稍后重试", 503);
+  }
 
   if (data.status !== "1" || !data.tips) return NextResponse.json([]);
 

src/app/api/room/create/route.ts

@@ -141,8 +141,13 @@ export const POST = apiHandler(async (req) => {
     url.searchParams.set("keywords", cuisine);
   }
 
-  const amapRes = await fetch(url.toString());
-  const amapData = await amapRes.json();
+  let amapData;
+  try {
+    const amapRes = await fetch(url.toString());
+    amapData = await amapRes.json();
+  } catch {
+    throw new ApiError("位置服务暂时不可用，请稍后重试", 503);
+  }
 
   let restaurants: Restaurant[] = [];
   if (amapData.status === "1" && amapData.pois?.length > 0) {

src/app/room/[id]/page.tsx

@@ -11,6 +11,7 @@ import { useRoomPolling } from "@/hooks/useRoomPolling";
 import { getUserId } from "@/lib/userId";
 import { joinRoom } from "@/lib/room";
 import { getSceneConfig } from "@/lib/sceneConfig";
+import { useToast } from "@/hooks/useToast";
 
 export default function RoomPage() {
   const params = useParams<{ id: string }>();
@@ -22,6 +23,7 @@ export default function RoomPage() {
   const [joinFailed, setJoinFailed] = useState(false);
   const [showLeaveConfirm, setShowLeaveConfirm] = useState(false);
   const leavingRef = useRef(false);
+  const toast = useToast();
 
   const {
     userCount, match, matchType, matchLikes, runnerUps, likeCounts, swipeCounts,
@@ -74,22 +76,38 @@ export default function RoomPage() {
   }, []);
 
   const handleReset = useCallback(async () => {
-    await fetch(`/api/room/${roomId}/reset`, {
-      method: "POST",
-      headers: { "Content-Type": "application/json" },
-      body: JSON.stringify({ userId }),
-    });
-    await mutate();
-  }, [roomId, userId, mutate]);
+    try {
+      const res = await fetch(`/api/room/${roomId}/reset`, {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ userId }),
+      });
+      if (!res.ok) {
+        const data = await res.json().catch(() => ({}));
+        throw new Error(data.error || "重置失败");
+      }
+      await mutate();
+    } catch (e) {
+      toast.show(e instanceof Error ? e.message : "重置失败");
+    }
+  }, [roomId, userId, mutate, toast]);
 
   const handleNarrow = useCallback(async (restaurantIds: string[]) => {
-    await fetch(`/api/room/${roomId}/reset`, {
-      method: "POST",
-      headers: { "Content-Type": "application/json" },
-      body: JSON.stringify({ userId, restaurantIds }),
-    });
-    await mutate();
-  }, [roomId, userId, mutate]);
+    try {
+      const res = await fetch(`/api/room/${roomId}/reset`, {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ userId, restaurantIds }),
+      });
+      if (!res.ok) {
+        const data = await res.json().catch(() => ({}));
+        throw new Error(data.error || "缩小范围失败");
+      }
+      await mutate();
+    } catch (e) {
+      toast.show(e instanceof Error ? e.message : "操作失败");
+    }
+  }, [roomId, userId, mutate, toast]);
 
   if (notFound || joinFailed) {
     return (

src/lib/navigation.ts

@@ -2,8 +2,10 @@ import type { Restaurant } from "@/types";
 
 export function buildNavUrl(restaurant: Restaurant): string {
   if (restaurant.location) {
-    const [lng, lat] = restaurant.location.split(",");
-    return `https://uri.amap.com/marker?position=${lng},${lat}&name=${encodeURIComponent(restaurant.name)}&callnative=1`;
+    const parts = restaurant.location.split(",");
+    if (parts.length === 2 && parts[0] && parts[1]) {
+      return `https://uri.amap.com/marker?position=${parts[0]},${parts[1]}&name=${encodeURIComponent(restaurant.name)}&callnative=1`;
+    }
   }
   return `https://www.google.com/maps/search/?api=1&query=${encodeURIComponent(restaurant.name)}`;
 }