chore: import upstream snapshot with attribution

apps/sim/hooks/queries/session.ts

@@ -0,0 +1,37 @@
+import { useQuery } from '@tanstack/react-query'
+import { client } from '@/lib/auth/auth-client'
+import {
+  type AppSession,
+  extractSessionDataFromAuthClientResult,
+} from '@/lib/auth/session-response'
+
+export const SESSION_STALE_TIME = 5 * 60 * 1000
+
+export const sessionKeys = {
+  all: ['session'] as const,
+  detail: () => [...sessionKeys.all, 'detail'] as const,
+}
+
+async function fetchSession(signal?: AbortSignal): Promise<AppSession> {
+  const res = await client.getSession({ fetchOptions: { signal } })
+  return extractSessionDataFromAuthClientResult(res) as AppSession
+}
+
+/**
+ * Reads the current Better Auth session via the client SDK.
+ *
+ * This is the Better Auth client SDK (not a same-origin `requestJson` contract),
+ * so a plain `useQuery` is correct — there is no boundary contract to bind.
+ *
+ * `retry: false` preserves the prior fail-fast contract: an auth failure (expired
+ * token, startup network partition) surfaces immediately rather than retrying a
+ * request that won't succeed.
+ */
+export function useSessionQuery() {
+  return useQuery({
+    queryKey: sessionKeys.detail(),
+    queryFn: ({ signal }) => fetchSession(signal),
+    staleTime: SESSION_STALE_TIME,
+    retry: false,
+  })
+}