Add a setting to turn off follow-up questions

The optional "FOLLOW-UP QUESTIONS" reinforcement section shown during
answer review is now gated behind a Settings toggle (on by default),
persisted locally the same way as dark mode and interface sounds.

scripts/autoload/block_session_service.gd

@@ -29,6 +29,7 @@ var simulation_total_blocks := 12
 var simulation_deadline_unix := 0.0
 var review_first_submission_recorded := false
 var core_block_size := DEFAULT_CORE_BLOCK_SIZE
+var show_review_followups := true
 
 const CORE_MIN_TARGET_SECONDS := 45.0
 const CORE_MAX_TARGET_SECONDS := 150.0
@@ -39,10 +40,12 @@ const CORE_BLOCK_SIZE_MAX := 40
 const SETTINGS_PATH := "user://settings.cfg"
 const SETTINGS_SECTION := "session"
 const SETTINGS_KEY_CORE_BLOCK_SIZE := "core_block_size"
+const SETTINGS_KEY_SHOW_REVIEW_FOLLOWUPS := "show_review_followups"
 
 
 func _ready() -> void:
 	_load_core_block_size()
+	_load_show_review_followups()
 
 
 func set_core_block_size(value: int) -> void:
@@ -57,6 +60,17 @@ func set_core_block_size(value: int) -> void:
 		push_warning("Unable to save core question block size preference.")
 
 
+func set_show_review_followups(value: bool) -> void:
+	if show_review_followups == value:
+		return
+	show_review_followups = value
+	var config := ConfigFile.new()
+	config.load(SETTINGS_PATH)
+	config.set_value(SETTINGS_SECTION, SETTINGS_KEY_SHOW_REVIEW_FOLLOWUPS, show_review_followups)
+	if config.save(SETTINGS_PATH) != OK:
+		push_warning("Unable to save follow-up question preference.")
+
+
 func _load_core_block_size() -> void:
 	var config := ConfigFile.new()
 	if config.load(SETTINGS_PATH) == OK:
@@ -65,6 +79,12 @@ func _load_core_block_size() -> void:
 			CORE_BLOCK_SIZE_MIN, CORE_BLOCK_SIZE_MAX)
 
 
+func _load_show_review_followups() -> void:
+	var config := ConfigFile.new()
+	if config.load(SETTINGS_PATH) == OK:
+		show_review_followups = bool(config.get_value(SETTINGS_SECTION, SETTINGS_KEY_SHOW_REVIEW_FOLLOWUPS, true))
+
+
 func start_dynamic_question(question: Dictionary) -> bool:
 	if question.is_empty():
 		return false

scripts/ui/question_player.gd

@@ -1811,6 +1811,9 @@ func _render_review_followups() -> void:
 	if review_followups_content == null:
 		return
 	_clear_container_children(review_followups_content)
+	if not BlockSessionService.show_review_followups:
+		review_followups_section.visible = false
+		return
 	var question := BlockSessionService.get_current_question()
 	var authored: Array = question.get("review_followups", [])
 	if review_followup_states.size() != authored.size():

scripts/ui/settings_screen.gd

@@ -9,6 +9,7 @@ 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
@@ -59,6 +60,13 @@ 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())
@@ -93,6 +101,7 @@ func _ready() -> void:
 func on_show(_payload: Variant = null) -> void:
 	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()