feat: add localization and site settings

src/app/api/software/latest/route.ts

@@ -2,18 +2,24 @@ import { NextRequest, NextResponse } from "next/server";
 import { prisma } from "@/lib/db";
 import { readFile, stat } from "fs/promises";
 import path from "path";
+import { getApiLang, pickText } from "@/lib/api-locale";
+import { getDownloadWowVersion } from "@/lib/wow-versions";
 
 const LAUNCHER_SLUG = "nanami-launcher";
 
 export async function GET(request: NextRequest) {
   const { searchParams } = new URL(request.url);
   const infoOnly = searchParams.get("info") === "1";
+  const lang = getApiLang(request);
+  // Download endpoint: only the URL determines what gets downloaded.
+  // Cookies (wow / locale) do not influence the binary.
+  const wowVersion = getDownloadWowVersion(request);
 
   const software = await prisma.software.findUnique({
     where: { slug: LAUNCHER_SLUG },
     include: {
       versions: {
-        where: { isLatest: true },
+        where: { isLatest: true, wowVersion },
         take: 1,
       },
     },
@@ -21,10 +27,10 @@ export async function GET(request: NextRequest) {
 
   if (!software || software.versions.length === 0) {
     if (infoOnly) {
-      return NextResponse.json({ available: false });
+      return NextResponse.json({ available: false, wowVersion });
     }
     return NextResponse.json(
-      { error: "暂无可下载版本" },
+      { error: `No release available for WoW ${wowVersion}` },
       { status: 404 }
     );
   }
@@ -49,11 +55,15 @@ export async function GET(request: NextRequest) {
       available: true,
       version: latest.version,
       versionCode: latest.versionCode,
-      changelog: latest.changelog,
+      changelog: pickText(latest.changelog, latest.changelogEn, lang),
+      changelogZh: latest.changelog,
+      changelogEn: latest.changelogEn,
       fileSize: latest.fileSize,
       createdAt: latest.createdAt,
       downloadUrl,
       downloadType: latest.downloadType,
+      wowVersion: latest.wowVersion,
+      lang,
     });
   }
 
@@ -79,7 +89,7 @@ export async function GET(request: NextRequest) {
 
     const fileBuffer = await readFile(filePath);
     const ext = path.extname(latest.filePath);
-    const fileName = `nanami-launcher-v${latest.version}${ext}`;
+    const fileName = `nanami-launcher-wow${latest.wowVersion}-v${latest.version}${ext}`;
 
     return new NextResponse(fileBuffer, {
       headers: {