Restore distractor-specific follow-up questions

scripts/ui/settings_screen.gd

@@ -9,7 +9,6 @@ const CORE_BLOCK_SIZE_STEP := 5
 var main: Control
 var theme_toggle: CheckButton
 var sound_toggle: CheckButton
-var followups_toggle: CheckButton
 var question_scale_value_label: Label
 var ccs_scale_value_label: Label
 var core_block_size_value_label: Label
@@ -73,13 +72,6 @@ func _ready() -> void:
 	sound_toggle.toggled.connect(UISoundService.set_sounds_enabled)
 	content.add_child(sound_toggle)
 
-	followups_toggle = CheckButton.new()
-	followups_toggle.text = "Follow-up questions"
-	followups_toggle.tooltip_text = "Optional reinforcement questions shown after you answer"
-	followups_toggle.custom_minimum_size = Vector2(0, 52)
-	followups_toggle.toggled.connect(BlockSessionService.set_show_review_followups)
-	content.add_child(followups_toggle)
-
 	content.add_child(_build_text_scale_row("Question bank text size", "question"))
 	content.add_child(_build_text_scale_row("CCS case text size", "ccs"))
 	content.add_child(_build_core_block_size_row())
@@ -117,7 +109,6 @@ func on_show(payload: Variant = null) -> void:
 	back_to_session_button.visible = not return_screen.is_empty()
 	theme_toggle.set_pressed_no_signal(UIThemeService.is_dark_mode())
 	sound_toggle.set_pressed_no_signal(UISoundService.are_sounds_enabled())
-	followups_toggle.set_pressed_no_signal(BlockSessionService.show_review_followups)
 	_refresh_text_scale_labels()