Add interface sound feedback

scripts/ui/question_player.gd

@@ -2,7 +2,7 @@ extends VBoxContainer
 
 const Style := preload("res://scripts/ui/ui_style.gd")
 const FEEDBACK_FADE_SECONDS := 0.45
-const CORRECT_ADVANCE_DELAY_SECONDS := 0.6
+const CORRECT_ADVANCE_DELAY_SECONDS := 1.25
 const TEXT_SCALE_MIN := 0.85
 const TEXT_SCALE_MAX := 1.35
 const TEXT_SCALE_STEP := 0.1
@@ -108,6 +108,7 @@ func _ready() -> void:
 	text_smaller_button.tooltip_text = "Decrease text size"
 	text_smaller_button.custom_minimum_size = Vector2(44, 44)
 	Style.style_chip(text_smaller_button, Style.CYAN)
+	UISoundService.set_button_sound(text_smaller_button, "toggle")
 	text_smaller_button.pressed.connect(func(): _adjust_question_text_scale(-TEXT_SCALE_STEP))
 	question_toolbar.add_child(text_smaller_button)
 
@@ -116,6 +117,7 @@ func _ready() -> void:
 	text_larger_button.tooltip_text = "Increase text size"
 	text_larger_button.custom_minimum_size = Vector2(44, 44)
 	Style.style_chip(text_larger_button, Style.CYAN)
+	UISoundService.set_button_sound(text_larger_button, "toggle")
 	text_larger_button.pressed.connect(func(): _adjust_question_text_scale(TEXT_SCALE_STEP))
 	question_toolbar.add_child(text_larger_button)
 
@@ -124,6 +126,7 @@ func _ready() -> void:
 	labs_button.icon = _make_labs_icon()
 	labs_button.custom_minimum_size = Vector2(44, 44)
 	Style.style_chip(labs_button, Style.LIME)
+	UISoundService.set_button_sound(labs_button, "open")
 	labs_button.pressed.connect(_show_labs_modal)
 	question_toolbar.add_child(labs_button)
 
@@ -132,6 +135,7 @@ func _ready() -> void:
 	clear_highlight_button.icon = _make_clear_highlights_icon()
 	clear_highlight_button.custom_minimum_size = Vector2(44, 44)
 	Style.style_chip(clear_highlight_button, Style.CYAN)
+	UISoundService.set_button_sound(clear_highlight_button, "eliminate")
 	clear_highlight_button.pressed.connect(_clear_current_highlights)
 	question_toolbar.add_child(clear_highlight_button)
 
@@ -141,6 +145,7 @@ func _ready() -> void:
 	flag_button.icon = _make_flag_icon()
 	flag_button.custom_minimum_size = Vector2(44, 44)
 	Style.style_chip(flag_button, Style.AMBER)
+	UISoundService.set_button_sound(flag_button, "toggle")
 	flag_button.toggled.connect(func(value: bool):
 		flagged = value
 		_refresh_toolbar_state()
@@ -217,6 +222,7 @@ func _ready() -> void:
 		button.custom_minimum_size = Vector2(0, 64)
 		button.alignment = HORIZONTAL_ALIGNMENT_LEFT
 		Style.style_answer_button(button)
+		UISoundService.set_button_sound(button, "select")
 		_set_scaled_button_font(button, 17)
 		button.pressed.connect(func(i := index): _select_choice(i))
 		button.gui_input.connect(func(event: InputEvent, i := index): _choice_gui_input(event, i))
@@ -288,6 +294,7 @@ func _ready() -> void:
 	skip_button.text = "Skip"
 	skip_button.custom_minimum_size = Vector2(120, 48)
 	Style.style_chip(skip_button, Style.AMBER)
+	UISoundService.set_button_sound(skip_button, "back")
 	skip_button.pressed.connect(_skip_current_question)
 	actions.add_child(skip_button)
 
@@ -535,6 +542,7 @@ func _choice_gui_input(event: InputEvent, index: int) -> void:
 		eliminated.erase(choice_id)
 	else:
 		eliminated.append(choice_id)
+	UISoundService.play_sound("eliminate")
 	_set_choice_button_text(index, choice)
 	_apply_saved_choice_state()
 
@@ -549,6 +557,7 @@ func _toggle_eliminate_selected() -> void:
 				eliminated.erase(selected_choice)
 			else:
 				eliminated.append(selected_choice)
+			UISoundService.play_sound("eliminate")
 			_set_choice_button_text(index, choices[index])
 			_apply_saved_choice_state()
 
@@ -663,6 +672,7 @@ func _lock_wrong_choice(choice_id: String) -> void:
 
 
 func _trigger_wrong_feedback() -> void:
+	UISoundService.play_sound("error")
 	shake_time = 0.28
 	shake_origin = position
 	green_fog_time = 0.0
@@ -672,6 +682,7 @@ func _trigger_wrong_feedback() -> void:
 
 
 func _trigger_correct_feedback() -> void:
+	UISoundService.play_sound("correct")
 	pending_correct_advance = true
 	correct_advance_delay = CORRECT_ADVANCE_DELAY_SECONDS
 	red_fog_time = 0.0
@@ -1010,6 +1021,7 @@ func _build_labs_modal() -> void:
 	close_button.tooltip_text = "Close lab results"
 	close_button.custom_minimum_size = Vector2(42, 38)
 	Style.style_chip(close_button, Style.RED)
+	UISoundService.set_button_sound(close_button, "close")
 	close_button.pressed.connect(_hide_labs_modal)
 	header.add_child(close_button)
 
@@ -1331,6 +1343,7 @@ func _build_followup_panel(index: int, choice_id: String) -> void:
 			option_button.alignment = HORIZONTAL_ALIGNMENT_LEFT
 			option_button.custom_minimum_size = Vector2(0, 32)
 			Style.style_chip(option_button, Style.CYAN)
+			UISoundService.set_button_sound(option_button, "select")
 			_set_scaled_button_font(option_button, 15)
 			option_button.set_meta("option_id", str(option.get("id", "")))
 			option_button.pressed.connect(func(option_id := str(option.get("id", "")), selected_button := option_button, followup_data := followup):
@@ -1459,6 +1472,7 @@ func _build_collapsed_followup(index: int, state: Dictionary) -> void:
 	summary.alignment = HORIZONTAL_ALIGNMENT_LEFT
 	summary.custom_minimum_size = Vector2(0, 40)
 	Style.style_chip(summary, Style.AMBER)
+	UISoundService.set_button_sound(summary, "open")
 	_set_scaled_button_font(summary, 15)
 	summary.gui_input.connect(func(_event: InputEvent): _mark_review_input_handled())
 	summary.pressed.connect(func(choice_id := str(state.get("choice_id", ""))): _toggle_followup_state(choice_id))
@@ -1472,6 +1486,7 @@ func _build_readonly_followup(index: int, state: Dictionary) -> void:
 	summary.alignment = HORIZONTAL_ALIGNMENT_LEFT
 	summary.custom_minimum_size = Vector2(0, 36)
 	Style.style_chip(summary, Style.AMBER)
+	UISoundService.set_button_sound(summary, "close")
 	_set_scaled_button_font(summary, 15)
 	summary.gui_input.connect(func(_event: InputEvent): _mark_review_input_handled())
 	summary.pressed.connect(func(choice_id := str(state.get("choice_id", ""))): _toggle_followup_state(choice_id))