feat: add word import and class type display controls

app/api/class-types/[id]/route.ts

@@ -15,6 +15,7 @@ export async function PUT(request: NextRequest, context: RouteContext) {
     const classType = updateClassType(Number(id), {
       name: String(body.name ?? ""),
       enabled: Boolean(body.enabled),
+      showCurrentWord: body.showCurrentWord !== false,
     });
 
     return NextResponse.json({ classType });
@@ -35,7 +36,7 @@ export async function DELETE(_request: NextRequest, context: RouteContext) {
 
 function getErrorMessage(error: unknown) {
   const message = error instanceof Error ? error.message : "操作失败";
-  if (message.includes("UNIQUE")) return "班级类型已存在";
+  if (message.includes("UNIQUE")) return "该年级下班级类型已存在";
   if (message.includes("FOREIGN KEY")) return "该班级类型下仍有题库，不能删除";
   return message;
 }

app/api/class-types/route.ts

@@ -1,18 +1,26 @@
 import { NextRequest, NextResponse } from "next/server";
-import { createClassType, listClassTypes } from "@/lib/db";
+import { createClassType, listClassTypes, type Grade } from "@/lib/db";
 
 export const runtime = "nodejs";
 export const dynamic = "force-dynamic";
 
 export async function GET(request: NextRequest) {
   const includeDisabled = request.nextUrl.searchParams.get("includeDisabled") !== "false";
-  return NextResponse.json({ classTypes: listClassTypes(includeDisabled) });
+  const grade = request.nextUrl.searchParams.get("grade") ?? undefined;
+  return NextResponse.json({
+    classTypes: listClassTypes({
+      grade: parseGrade(grade),
+      includeDisabled,
+    }),
+  });
 }
 
 export async function POST(request: NextRequest) {
   try {
     const body = await request.json();
-    const classType = createClassType(String(body.name ?? ""));
+    const classType = createClassType(body.grade as Grade, String(body.name ?? ""), {
+      showCurrentWord: body.showCurrentWord !== false,
+    });
     return NextResponse.json({ classType }, { status: 201 });
   } catch (error) {
     return NextResponse.json({ message: getErrorMessage(error) }, { status: 400 });
@@ -21,6 +29,10 @@ export async function POST(request: NextRequest) {
 
 function getErrorMessage(error: unknown) {
   const message = error instanceof Error ? error.message : "操作失败";
-  if (message.includes("UNIQUE")) return "班级类型已存在";
+  if (message.includes("UNIQUE")) return "该年级下班级类型已存在";
   return message;
 }
+
+function parseGrade(value: string | undefined) {
+  return value === "小班" || value === "中班" || value === "大班" ? value : undefined;
+}