global fix and add tauri app

apps/frontend/app/download/android/route.ts

@@ -0,0 +1,44 @@
+import { createReadStream, existsSync, statSync } from 'node:fs';
+import path from 'node:path';
+import { Readable } from 'node:stream';
+import { NextResponse } from 'next/server';
+
+export const runtime = 'nodejs';
+
+const APK_CANDIDATES = [
+  process.env.TAURI_ANDROID_APK_PATH,
+  path.resolve(process.cwd(), 'public/downloads/lendry-id.apk'),
+  path.resolve(process.cwd(), '../../tauri_app/src-tauri/gen/android/app/build/outputs/apk/universal/release/app-universal-release.apk'),
+  path.resolve(process.cwd(), '../../tauri_app/src-tauri/gen/android/app/build/outputs/apk/universal/debug/app-universal-debug.apk'),
+  path.resolve(process.cwd(), '../../tauri_app/src-tauri/gen/android/app/build/outputs/apk/arm64/release/app-arm64-release.apk'),
+  path.resolve(process.cwd(), '../../tauri_app/src-tauri/gen/android/app/build/outputs/apk/arm64/debug/app-arm64-debug.apk')
+].filter((candidate): candidate is string => Boolean(candidate));
+
+function resolveApkPath() {
+  return APK_CANDIDATES.find((candidate) => existsSync(candidate) && statSync(candidate).isFile());
+}
+
+export async function GET() {
+  const apkPath = resolveApkPath();
+  if (!apkPath) {
+    return NextResponse.json(
+      {
+        message:
+          'APK ещё не собран. Соберите tauri_app для Android или укажите TAURI_ANDROID_APK_PATH/public/downloads/lendry-id.apk.'
+      },
+      { status: 404 }
+    );
+  }
+
+  const stat = statSync(apkPath);
+  const stream = Readable.toWeb(createReadStream(apkPath)) as ReadableStream;
+
+  return new Response(stream, {
+    headers: {
+      'Content-Type': 'application/vnd.android.package-archive',
+      'Content-Length': String(stat.size),
+      'Content-Disposition': 'attachment; filename="lendry-id.apk"',
+      'Cache-Control': 'no-store'
+    }
+  });
+}