Add bypass param for testing

app.py

@@ -260,8 +260,14 @@ st.markdown(GLOBAL_CSS, unsafe_allow_html=True)
 # Session State Initialization
 # =====================================================================
 
+# Secret bypass: ?bypass=cait2026 skips auth
+_qp = st.query_params
 if "auth_stage" not in st.session_state:
-    st.session_state.auth_stage = "email"       # email | code | demo | ended
+    if _qp.get("bypass") == "cait2026":
+        st.session_state.auth_stage = "demo"
+        st.session_state.demo_start_time = time.time() + 99999
+    else:
+        st.session_state.auth_stage = "email"       # email | code | demo | ended
 if "auth_email" not in st.session_state:
     st.session_state.auth_email = ""
 if "auth_code" not in st.session_state: