fix(proxy): support PocketBase v0.23+ _superusers auth

UpSnap uses PocketBase which moved admins to _superusers collection
in v0.23+. Try _superusers first, fallback to users.

Co-Authored-By: Claude <noreply@anthropic.com>

packages/proxy/src/services/upsnap.ts

@@ -4,8 +4,12 @@ import { config } from '../config.js';
 let token: string | null = null;
 
 async function authenticate(): Promise<string> {
+  // PocketBase v0.23+ moved admins to _superusers collection
+  const collections = ['_superusers', 'users'];
+
+  for (const collection of collections) {
     const res = await fetch(
-    `${config.upsnap.url}/api/collections/users/auth-with-password`,
+      `${config.upsnap.url}/api/collections/${collection}/auth-with-password`,
       {
         method: 'POST',
         headers: { 'Content-Type': 'application/json' },
@@ -16,14 +20,15 @@ async function authenticate(): Promise<string> {
       }
     );
 
-  if (!res.ok) {
-    throw new Error(`UpSnap auth failed: ${res.status} ${await res.text()}`);
-  }
-
+    if (res.ok) {
       const data = (await res.json()) as UpSnapAuthResponse;
       token = data.token;
       return token;
     }
+  }
+
+  throw new Error('UpSnap auth failed: could not authenticate as superuser or user');
+}
 
 async function getToken(): Promise<string> {
   if (!token) {