feat: integrate Sensei Spook mascot in 4 stances, speech bubbles, and style updates

scripts/check_ports.py

@@ -0,0 +1,8 @@
+import requests
+
+for port in [3000, 3001, 34821]:
+    try:
+        r = requests.get(f"http://localhost:{port}", timeout=2)
+        print(f"Port {port}: {r.status_code}")
+    except Exception as e:
+        print(f"Port {port}: failed ({e})")