feat: add local auth billing and usage management

app/api/auth/logout/route.ts

@@ -1,11 +1,18 @@
-import { clearAuthCookies } from "@/lib/server/auth/oauth";
+import { NextResponse } from "next/server";
+import { clearPlatformSessionCookies } from "@/lib/server/auth/local";
 
 export const runtime = "nodejs";
 
 export async function GET(request: Request) {
-  return clearAuthCookies(request);
+  return logoutResponse(request);
 }
 
 export async function POST(request: Request) {
-  return clearAuthCookies(request);
+  return logoutResponse(request);
+}
+
+function logoutResponse(request: Request) {
+  const response = NextResponse.redirect(new URL("/auth/login?loggedOut=1", request.url));
+  clearPlatformSessionCookies(response, request.url);
+  return response;
 }