feat: Implement password persistence using localStorage, controlled by the new PERSIST_PASSWORD environment variable.

app/api/config/route.ts

@@ -8,11 +8,13 @@ import { NextRequest, NextResponse } from 'next/server';
 export const runtime = 'edge';
 
 const ACCESS_PASSWORD = process.env.ACCESS_PASSWORD || '';
+const PERSIST_PASSWORD = process.env.PERSIST_PASSWORD !== 'false';
 const SUBSCRIPTION_SOURCES = process.env.SUBSCRIPTION_SOURCES || process.env.NEXT_PUBLIC_SUBSCRIPTION_SOURCES || '';
 
 export async function GET() {
     return NextResponse.json({
         hasEnvPassword: ACCESS_PASSWORD.length > 0,
+        persistPassword: PERSIST_PASSWORD,
         subscriptionSources: SUBSCRIPTION_SOURCES,
     });
 }