fix(core): avoid infinite sign in with selfhost (#13169)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
* The 404 page now reflects user session state across multiple servers,
showing the appropriate user context when multiple accounts are logged
in.

* **Improvements**
* Enhanced user experience on the 404 page by accurately displaying
information based on the first active logged-in account across all
servers.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/core/src/desktop/pages/404/index.tsx

@@ -5,6 +5,7 @@ import {
 import { useSignOut } from '@affine/core/components/hooks/affine/use-sign-out';
 import { DesktopApiService } from '@affine/core/modules/desktop-api';
 import {
+  FrameworkScope,
   useLiveData,
   useService,
   useServiceOptional,
@@ -16,7 +17,7 @@ import {
   RouteLogic,
   useNavigateHelper,
 } from '../../../components/hooks/use-navigate-helper';
-import { AuthService } from '../../../modules/cloud';
+import { ServersService } from '../../../modules/cloud';
 import { SignIn } from '../auth/sign-in';
 
 /**
@@ -27,9 +28,15 @@ export const PageNotFound = ({
 }: {
   noPermission?: boolean;
 }): ReactElement => {
-  const authService = useService(AuthService);
+  const serversService = useService(ServersService);
+  const serversWithAccount = useLiveData(serversService.serversWithAccount$);
+
   const desktopApi = useServiceOptional(DesktopApiService);
-  const account = useLiveData(authService.session.account$);
+
+  // Check all servers for any logged in accounts to avoid showing sign-in page if user has an active session on any server
+  const firstLogged = serversWithAccount.find(
+    ({ account }) => account !== null
+  );
   const { jumpToIndex } = useNavigateHelper();
   const openSignOutModal = useSignOut();
 
@@ -46,19 +53,23 @@ export const PageNotFound = ({
   // strip the origin
   const currentUrl = window.location.href.replace(window.location.origin, '');
 
-  return noPermission ? (
+  return (
+    <FrameworkScope scope={firstLogged?.server.scope}>
+      {noPermission ? (
         <NoPermissionOrNotFound
-      user={account}
+          user={firstLogged?.account}
           onBack={handleBackButtonClick}
           onSignOut={openSignOutModal}
           signInComponent={<SignIn redirectUrl={currentUrl} />}
         />
       ) : (
         <NotFoundPage
-      user={account}
+          user={firstLogged?.account}
           onBack={handleBackButtonClick}
           onSignOut={openSignOutModal}
         />
+      )}
+    </FrameworkScope>
   );
 };
 

packages/frontend/core/src/modules/cloud/services/servers.ts

@@ -47,6 +47,17 @@ export class ServersService extends Service {
     [] as any
   );
 
+  serversWithAccount$ = this.servers$
+    .map(servers =>
+      servers.map(server =>
+        server.account$.map(account => ({
+          server,
+          account,
+        }))
+      )
+    )
+    .flat();
+
   server$(id: string) {
     return this.servers$.map(servers =>
       servers.find(server => server.id === id)