Merge main into agent/470f875e0416 to resolve PR #44 conflicts

# Conflicts:
#	scripts/main_menu.gd

scripts/main_menu.gd

@@ -6,6 +6,10 @@ extends Control
 ## The Login and Register buttons on the AuthButtonsRow directly set the panel's
 ## mode, so the user can switch between Login and Register at any time while
 ## the panel is open.
+##
+## On successful auth the token is stored via ApiClient, AuthButtonsRow hides,
+## the welcome label shows the username, and the Play button becomes enabled.
+## The auth form fields are hidden, leaving only the welcome message visible.
 
 # ─── UI references ────────────────────────────────────────────────────────────
 
@@ -162,12 +166,16 @@ func _on_auth_complete(result: Dictionary) -> void:
 	_is_authenticating = false
 
 	if result.ok:
-		# Success — show welcome, enable Play, hide the now-redundant
+		# Success — hide the auth form fields, show only the welcome label.
-		# Login/Register entry points (the auth panel itself stays open,
+		_username_edit.visible = false
-		# showing the welcome message in place of the form).
+		_password_edit.visible = false
+		_email_edit.visible = false
+		_dob_edit.visible = false
+		_auth_button.visible = false
+		_auth_mode_label.visible = false
+		_status_label.visible = false
 		_welcome_label.text = "Welcome, %s!" % _username_edit.text.strip_edges()
 		_welcome_label.visible = true
-		_status_label.visible = false
 		_play_button.disabled = false
 		_auth_buttons_row.visible = false
 		print("Auth successful. Token stored.")

scripts/smoke_test_main_menu_full_flow.gd

@@ -1,9 +1,8 @@
 extends SceneTree
 ## Full click-through simulation of the real user flow: press Register,
 ## fill the form exactly as a human would, submit, confirm Play actually
-## becomes clickable. This is the check that would have caught the
+## becomes clickable. Also verifies that after successful auth the auth
-## original bug (no way to even open the form) and would catch a repeat
+## form fields are hidden, leaving only the welcome message visible.
-## of it.
 
 var passed := 0
 var failed := 0
@@ -28,6 +27,7 @@ func _run() -> void:
 	var email_edit: LineEdit = instance.get_node("CenterContainer/VBoxContainer/AuthPanel/MarginContainer/AuthVBox/EmailEdit")
 	var dob_edit: LineEdit = instance.get_node("CenterContainer/VBoxContainer/AuthPanel/MarginContainer/AuthVBox/DOBEdit")
 	var auth_button: Button = instance.get_node("CenterContainer/VBoxContainer/AuthPanel/MarginContainer/AuthVBox/AuthButton")
+	var auth_mode_label: Label = instance.get_node("CenterContainer/VBoxContainer/AuthPanel/MarginContainer/AuthVBox/AuthModeLabel")
 	var welcome_label: Label = instance.get_node("CenterContainer/VBoxContainer/AuthPanel/MarginContainer/AuthVBox/WelcomeLabel")
 	var play_button: Button = instance.get_node("CenterContainer/VBoxContainer/PlayButton")
 
@@ -63,6 +63,16 @@ func _run() -> void:
 	_check("Welcome label visible", welcome_label.visible)
 	_check("Auth buttons row hid itself after success", not auth_buttons_row.visible)
 
+	# Verify the auth form fields are hidden after successful auth,
+	# leaving only the welcome message visible within the panel.
+	_check("Username edit hidden after auth", not username_edit.visible)
+	_check("Password edit hidden after auth", not password_edit.visible)
+	_check("Email edit hidden after auth", not email_edit.visible)
+	_check("DOB edit hidden after auth", not dob_edit.visible)
+	_check("Auth button hidden after auth", not auth_button.visible)
+	_check("Auth mode label hidden after auth", not auth_mode_label.visible)
+	_check("Welcome label contains username", welcome_label.text.begins_with("Welcome, mainmenu_e2e_"))
+
 	print("\n=== SMOKE RESULT: %d/%d passed ===" % [passed, passed + failed])
 	quit(0 if failed == 0 else 1)