Add node.js help callout

src/components/SetupBanner.tsx

@@ -203,6 +203,7 @@ export function SetupBanner() {
                   )}
                 </div>
               )}
+              <NodeJsHelpCallout />
             </AccordionContent>
           </AccordionItem>
 
@@ -287,3 +288,28 @@ export function SetupBanner() {
     </>
   );
 }
+
+function NodeJsHelpCallout() {
+  return (
+    <div className="mt-3 p-3 bg-(--background-lighter) border rounded-lg text-sm">
+      <p>
+        If you run into issues, read our{" "}
+        <a
+          onClick={() => {
+            IpcClient.getInstance().openExternalUrl(
+              "https://www.dyad.sh/docs/help/nodejs"
+            );
+          }}
+          className="text-blue-600 dark:text-blue-400 hover:underline font-medium"
+        >
+          Node.js troubleshooting guide
+        </a>
+        .{" "}
+      </p>
+      <p className="mt-2">
+        Still stuck? Click the <b>Help</b> button in the bottom-left corner and
+        then <b>Report a Bug</b>.
+      </p>
+    </div>
+  );
+}