refactor: 引入 apiHandler + ApiError，消除 20 个路由的 try/catch 样板

- 新增 src/lib/api.ts：ApiError 错误类 + apiHandler 统一包装器
- 20 个 API 路由统一使用 apiHandler，删除重复的 try/catch 块
- 验证错误改用 throw new ApiError()，减少嵌套层级
- join/manage 路由的错误码映射改为直接抛出 ApiError
- 删除已无引用的 errorResponse 辅助函数
- 净减 273 行代码

src/app/api/room/[id]/reset/route.ts

@@ -1,11 +1,9 @@
 import { NextResponse } from "next/server";
 import { atomicUpdateRoom } from "@/lib/store";
 import { notify } from "@/lib/roomEvents";
+import { apiHandler } from "@/lib/api";
 
-export async function POST(
-  req: Request,
-  { params }: { params: Promise<{ id: string }> },
-) {
+export const POST = apiHandler(async (req, { params }) => {
   const { id } = await params;
 
   let restaurantIds: string[] | undefined;
@@ -18,33 +16,25 @@ export async function POST(
     // No body or invalid JSON — plain reset
   }
 
-  try {
-    const updated = await atomicUpdateRoom(id, (data) => {
-      if (restaurantIds && restaurantIds.length > 0) {
-        const idSet = new Set(restaurantIds);
-        data.restaurants = data.restaurants.filter((r) => idSet.has(r.id));
-      }
-      data.likes = {};
-      data.swipeCounts = {};
-      data.match = null;
-      return data;
-    });
-
-    if (!updated) {
-      return NextResponse.json(
-        { error: "房间不存在或已过期" },
-        { status: 404 },
-      );
+  const updated = await atomicUpdateRoom(id, (data) => {
+    if (restaurantIds && restaurantIds.length > 0) {
+      const idSet = new Set(restaurantIds);
+      data.restaurants = data.restaurants.filter((r) => idSet.has(r.id));
     }
+    data.likes = {};
+    data.swipeCounts = {};
+    data.match = null;
+    return data;
+  });
 
-    notify(id);
-
-    return NextResponse.json({ ok: true });
-  } catch (e) {
-    console.error("Failed to reset room:", e);
+  if (!updated) {
     return NextResponse.json(
-      { error: "重置失败" },
-      { status: 500 },
+      { error: "房间不存在或已过期" },
+      { status: 404 },
     );
   }
-}
+
+  notify(id);
+
+  return NextResponse.json({ ok: true });
+});