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;
+}

app/api/words/[id]/generate-audio/route.ts

@@ -30,7 +30,7 @@ export async function POST(_request: NextRequest, context: RouteContext) {
     const safeEnglish = word.english.toLowerCase().replace(/[^a-z0-9]+/g, "-").replace(/(^-|-$)/g, "");
     const fileName = `${word.id}-${safeEnglish || "word"}.mp3`;
     const filePath = getAudioFilePath(fileName);
-    const publicPath = getAudioPublicPath(fileName);
+    const publicPath = `${getAudioPublicPath(fileName)}?v=${Date.now()}`;
 
     const settings = getSettings();
     const tts = new EdgeTTS(word.english, settings.ttsVoice, {

app/api/words/export/route.ts

@@ -0,0 +1,25 @@
+import { NextRequest } from "next/server";
+import { listWords } from "@/lib/db";
+import { buildWordExcel } from "@/lib/word-excel";
+
+export const runtime = "nodejs";
+export const dynamic = "force-dynamic";
+
+export async function GET(request: NextRequest) {
+  const searchParams = request.nextUrl.searchParams;
+  const grade = searchParams.get("grade") ?? undefined;
+  const classTypeId = Number(searchParams.get("classTypeId"));
+  const words = listWords({
+    grade,
+    classTypeId: Number.isFinite(classTypeId) && classTypeId > 0 ? classTypeId : undefined,
+  });
+  const workbook = buildWordExcel(words);
+
+  return new Response(workbook, {
+    headers: {
+      "Content-Type": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+      "Content-Disposition": `attachment; filename="${encodeURIComponent("词库导入表格")}.xlsx"`,
+      "Cache-Control": "no-store",
+    },
+  });
+}

app/api/words/import/route.ts

@@ -0,0 +1,34 @@
+import { NextRequest, NextResponse } from "next/server";
+import { importWords, type Grade } from "@/lib/db";
+import { parseWordExcel } from "@/lib/word-excel";
+
+export const runtime = "nodejs";
+export const dynamic = "force-dynamic";
+
+export async function POST(request: NextRequest) {
+  try {
+    const formData = await request.formData();
+    const grade = String(formData.get("grade") ?? "") as Grade;
+    const classTypeId = Number(formData.get("classTypeId"));
+    const file = formData.get("file");
+
+    if (!(file instanceof File)) {
+      return NextResponse.json({ message: "请选择要导入的 Excel 表格" }, { status: 400 });
+    }
+
+    const buffer = Buffer.from(await file.arrayBuffer());
+    const rows = parseWordExcel(buffer);
+    const result = importWords(grade, classTypeId, rows);
+
+    return NextResponse.json({ result });
+  } catch (error) {
+    return NextResponse.json({ message: getErrorMessage(error) }, { status: 400 });
+  }
+}
+
+function getErrorMessage(error: unknown) {
+  const message = error instanceof Error ? error.message : "导入失败";
+  if (message.includes("FOREIGN KEY")) return "班级类型不存在";
+  if (message.includes("Unsupported file")) return "无法读取该表格，请使用 .xlsx 文件";
+  return message;
+}