feat(auth): replace login/refresh/me with /api/auth/session

app/api/auth/session/route.ts

@@ -0,0 +1,50 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { isAdminTokenValue, isGuestTokenValue, getGuestFromRequest, verifyAdminToken } from '@/lib/auth/tokens';
+import { ADM_COOKIE, USR_COOKIE, buildCookie, isSecureCookie } from '@/lib/auth/cookies';
+
+const ONE_YEAR = 60 * 60 * 24 * 365;
+
+export async function POST(request: NextRequest) {
+  const body = await request.json().catch(() => ({}));
+  const { adm, usr } = body as { adm?: string; usr?: string };
+
+  const headers = new Headers();
+  const secure = isSecureCookie(request);
+  const cookies: string[] = [];
+  let role: 'admin' | 'guest' | 'none' = 'none';
+  let guestId: string | null = null;
+
+  if (adm) {
+    if (!isAdminTokenValue(adm)) {
+      return NextResponse.json({ error: 'Invalid admin token' }, { status: 401 });
+    }
+    cookies.push(buildCookie(ADM_COOKIE, adm, secure, ONE_YEAR));
+    role = 'admin';
+  }
+
+  if (usr) {
+    const guest = await isGuestTokenValue(usr);
+    if (!guest) {
+      return NextResponse.json({ error: 'Invalid guest token' }, { status: 401 });
+    }
+    cookies.push(buildCookie(USR_COOKIE, usr, secure, ONE_YEAR));
+    if (role !== 'admin') role = 'guest';
+    guestId = guest.id;
+  }
+
+  if (cookies.length === 0) {
+    return NextResponse.json({ error: 'No token provided' }, { status: 400 });
+  }
+
+  for (const c of cookies) headers.append('Set-Cookie', c);
+  return NextResponse.json({ success: true, role, guestId }, { headers });
+}
+
+export async function GET(request: NextRequest) {
+  const isAdmin = verifyAdminToken(request);
+  const guest = await getGuestFromRequest(request);
+
+  if (isAdmin) return NextResponse.json({ role: 'admin', guest: guest ? { id: guest.id, name: guest.name } : null });
+  if (guest) return NextResponse.json({ role: 'guest', guest: { id: guest.id, name: guest.name } });
+  return NextResponse.json({ role: 'none' });
+}