fix(intro): remove blocking token wait on submit for instant onboarding transition

src/app/intro/intro-client.tsx

@@ -59,21 +59,29 @@ export default function IntroClient() {
   const handleOpenSteps = useCallback(() => {
     setIsStepsOpen(true);
     if (typeof window !== "undefined") {
+      try {
         const url = new URL(window.location.href);
         url.searchParams.set("steps", "open");
         window.history.replaceState({ steps: "open" }, "", url.toString());
+      } catch (e) {
+        console.warn("Could not update URL history for steps:", e);
+      }
     }
   }, []);
 
   const handleCloseSteps = useCallback(() => {
     setIsStepsOpen(false);
     if (typeof window !== "undefined") {
+      try {
         const params = new URLSearchParams(window.location.search);
         if (params.get("steps") === "open") {
           const url = new URL(window.location.href);
           url.searchParams.delete("steps");
           window.history.replaceState({}, "", url.toString());
         }
+      } catch (e) {
+        console.warn("Could not clear URL history for steps:", e);
+      }
     }
   }, []);
 
@@ -90,23 +98,26 @@ export default function IntroClient() {
       return;
     }
 
-    setIsSubmitting(true);
-
-    try {
+    // If user is not authenticated yet, open onboarding steps immediately (0ms delay)
     if (!authBridge.isAuthenticated()) {
-        const token = await authBridge.ensureToken();
-        if (!token) {
-          console.warn(
-            "No token from bridge – opening intro onboarding steps",
-          );
       handleOpenSteps();
       return;
     }
-      }
 
+    setIsSubmitting(true);
+
+    try {
       let profileResponse = profile;
       try {
-        const { data: freshProfile } = await refetch();
+        // Race refetch against a 2-second timeout so slow network never hangs the button
+        const refetchPromise = refetch();
+        const timeoutPromise = new Promise<{ data?: undefined }>((resolve) =>
+          setTimeout(() => resolve({ data: undefined }), 2000),
+        );
+        const { data: freshProfile } = await Promise.race([
+          refetchPromise,
+          timeoutPromise,
+        ]);
         profileResponse = freshProfile ?? profile;
       } catch (refetchError) {
         console.warn(