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/blindbox/room/[code]/route.ts

@@ -1,63 +1,48 @@
-import { NextRequest, NextResponse } from "next/server";
+import { NextResponse } from "next/server";
 import { prisma } from "@/lib/prisma";
-import { errorResponse, getRoomByCode } from "@/lib/blindbox";
+import { getRoomByCode } from "@/lib/blindbox";
+import { apiHandler, ApiError } from "@/lib/api";
 
-export async function GET(
-  _req: NextRequest,
-  { params }: { params: Promise<{ code: string }> },
-) {
-  try {
-    const { code } = await params;
-    const room = await getRoomByCode(code.toUpperCase());
+export const GET = apiHandler(async (_req, { params }) => {
+  const { code } = await params;
+  const room = await getRoomByCode(code.toUpperCase());
 
-    if (!room) {
-      return errorResponse("房间不存在", 404);
-    }
+  if (!room) throw new ApiError("房间不存在", 404);
 
-    return NextResponse.json({
-      id: room.id,
-      code: room.code,
-      name: room.name,
-      creatorId: room.creatorId,
-      poolCount: room._count.ideas,
-      members: room.members.map((m) => ({
-        ...m.user,
-        joinedAt: m.joinedAt,
-      })),
-    });
-  } catch {
-    return errorResponse("获取房间信息失败", 500);
+  return NextResponse.json({
+    id: room.id,
+    code: room.code,
+    name: room.name,
+    creatorId: room.creatorId,
+    poolCount: room._count.ideas,
+    members: room.members.map((m) => ({
+      ...m.user,
+      joinedAt: m.joinedAt,
+    })),
+  });
+});
+
+export const DELETE = apiHandler(async (req, { params }) => {
+  const { code } = await params;
+  const { userId } = await req.json();
+
+  if (!userId) throw new ApiError("缺少用户 ID");
+
+  const room = await prisma.blindBoxRoom.findUnique({
+    where: { code: code.toUpperCase() },
+  });
+  if (!room) throw new ApiError("房间不存在", 404);
+
+  if (room.creatorId === userId) {
+    await prisma.blindBoxRoom.delete({ where: { id: room.id } });
+    return NextResponse.json({ action: "deleted" });
   }
-}
 
-export async function DELETE(
-  req: NextRequest,
-  { params }: { params: Promise<{ code: string }> },
-) {
-  try {
-    const { code } = await params;
-    const { userId } = await req.json();
+  const membership = await prisma.blindBoxMember.findUnique({
+    where: { roomId_userId: { roomId: room.id, userId } },
+  });
+  if (!membership) throw new ApiError("你不是该房间成员", 403);
 
-    if (!userId) return errorResponse("缺少用户 ID", 400);
-
-    const room = await prisma.blindBoxRoom.findUnique({
-      where: { code: code.toUpperCase() },
-    });
-    if (!room) return errorResponse("房间不存在", 404);
-
-    if (room.creatorId === userId) {
-      await prisma.blindBoxRoom.delete({ where: { id: room.id } });
-      return NextResponse.json({ action: "deleted" });
-    }
-
-    const membership = await prisma.blindBoxMember.findUnique({
-      where: { roomId_userId: { roomId: room.id, userId } },
-    });
-    if (!membership) return errorResponse("你不是该房间成员", 403);
-
-    await prisma.blindBoxMember.delete({ where: { id: membership.id } });
-    return NextResponse.json({ action: "left" });
-  } catch {
-    return errorResponse("操作失败", 500);
-  }
-}
+  await prisma.blindBoxMember.delete({ where: { id: membership.id } });
+  return NextResponse.json({ action: "left" });
+});