Stop the sign-in page from reloading itself on a signed-out query

The query cache subscriber hard-redirects to /signin whenever a query fails
with AUTH_REQUIRED or AUTH_EXPIRED. On staging the dev panel mounts on every
page and its project meta hooks fetched the projects list while signed out,
so the sign-in page itself received a 401 and reloaded in a loop. This only
surfaced after #785, which let the domain error code reach the browser; the
query had been failing silently before that.

The subscriber now skips the redirect when already on /signin, and
useProjectMeta no longer fetches for an empty projectId.

Claude-Session: https://claude.ai/code/session_01Y7psErb45XSCJXpeZ9sipC

Author: InfinityBowman

packages/web/src/lib/queryClient.ts

@@ -58,6 +58,8 @@ function getQueryClient(): QueryClient {
     if (event.type === 'updated' && event.query.state.error) {
       const domainError = getDomainError(event.query.state.error);
       if (domainError?.code === 'AUTH_REQUIRED' || domainError?.code === 'AUTH_EXPIRED') {
+        // A signed-out query failing on the sign-in page itself would otherwise reload it forever
+        if (window.location.pathname === '/signin') return;
         window.location.href = '/signin';
       }
     }

packages/web/src/project/workspace-data.ts

@@ -521,6 +521,8 @@ export function useProjectMeta(projectId: string): ProjectMetaInfo {
   const { data } = useQuery({
     queryKey: queryKeys.projects.all,
     queryFn: () => getMyProjects(),
+    // Callers outside a project (the dev panel on every page) pass '' and must not fetch
+    enabled: Boolean(projectId),
     ...QUERY_STABLE,
   });
   return useMemo(() => {