Persist text zoom level across sessions

Question bank and CCS case text-size (A-/A+) previously reset to 1.0
on every app launch. Both now load their saved scale from
user://settings.cfg at startup and save on every adjustment, mirroring
the existing pattern used for dark/light mode and sound preferences.

scripts/autoload/ccs_service.gd

@@ -17,6 +17,9 @@ signal request_failed(message: String)
 const TEXT_SCALE_MIN := 0.85
 const TEXT_SCALE_MAX := 1.35
 const TEXT_SCALE_STEP := 0.1
+const TEXT_SCALE_SETTINGS_PATH := "user://settings.cfg"
+const TEXT_SCALE_SETTINGS_SECTION := "study"
+const TEXT_SCALE_SETTINGS_KEY := "ccs_text_scale"
 
 var api_url := DEFAULT_API_URL
 var request: HTTPRequest
@@ -37,6 +40,7 @@ var request_access_token := ""
 
 func _ready() -> void:
 	api_url = EndpointConfig.resolve(str(ProjectSettings.get_setting("step3/ccs_api_url", DEFAULT_API_URL)), "/api/ccs")
+	text_scale = _load_text_scale_preference()
 	request = HTTPRequest.new()
 	request.request_completed.connect(_on_request_completed)
 	add_child(request)
@@ -100,6 +104,23 @@ func submit_report(attempt_id: String, category: String, details: String) -> voi
 
 func adjust_text_scale(delta: float) -> void:
 	text_scale = clampf(text_scale + delta, TEXT_SCALE_MIN, TEXT_SCALE_MAX)
+	_save_text_scale_preference(text_scale)
+
+
+func _load_text_scale_preference() -> float:
+	var config := ConfigFile.new()
+	if config.load(TEXT_SCALE_SETTINGS_PATH) == OK:
+		var saved: float = config.get_value(TEXT_SCALE_SETTINGS_SECTION, TEXT_SCALE_SETTINGS_KEY, 1.0)
+		return clampf(saved, TEXT_SCALE_MIN, TEXT_SCALE_MAX)
+	return 1.0
+
+
+func _save_text_scale_preference(value: float) -> void:
+	var config := ConfigFile.new()
+	config.load(TEXT_SCALE_SETTINGS_PATH)
+	config.set_value(TEXT_SCALE_SETTINGS_SECTION, TEXT_SCALE_SETTINGS_KEY, value)
+	if config.save(TEXT_SCALE_SETTINGS_PATH) != OK:
+		push_warning("Unable to save CCS text scale preference.")
 
 
 func toggle_highlight(attempt_id: String, region_id: String, start: int, end: int) -> void:

scripts/ui/question_player.gd

@@ -18,6 +18,9 @@ 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
+const TEXT_SCALE_SETTINGS_PATH := "user://settings.cfg"
+const TEXT_SCALE_SETTINGS_SECTION := "study"
+const TEXT_SCALE_SETTINGS_KEY := "question_text_scale"
 const REPORT_DETAILS_MIN := 10
 const REPORT_DETAILS_MAX := 2000
 const MEDIA_ZOOM_MIN := 0.25
@@ -146,6 +149,7 @@ var shake_origin := Vector2.ZERO
 
 func _ready() -> void:
 	theme_service = get_node("/root/UIThemeService")
+	question_text_scale = _load_text_scale_preference()
 	set_anchors_preset(Control.PRESET_FULL_RECT)
 	add_theme_constant_override("separation", 10)
 	if not QuestionBankService.choice_percentages_updated.is_connected(_on_choice_percentages_updated):
@@ -2121,11 +2125,28 @@ func _adjust_question_text_scale(delta: float) -> void:
 	if is_equal_approx(next_scale, question_text_scale):
 		return
 	question_text_scale = next_scale
+	_save_text_scale_preference(next_scale)
 	_refresh_scaled_fonts(self)
 	_render_stem()
 	_apply_saved_choice_state()
 
 
+func _load_text_scale_preference() -> float:
+	var config := ConfigFile.new()
+	if config.load(TEXT_SCALE_SETTINGS_PATH) == OK:
+		var saved: float = config.get_value(TEXT_SCALE_SETTINGS_SECTION, TEXT_SCALE_SETTINGS_KEY, 1.0)
+		return clamp(saved, TEXT_SCALE_MIN, TEXT_SCALE_MAX)
+	return 1.0
+
+
+func _save_text_scale_preference(value: float) -> void:
+	var config := ConfigFile.new()
+	config.load(TEXT_SCALE_SETTINGS_PATH)
+	config.set_value(TEXT_SCALE_SETTINGS_SECTION, TEXT_SCALE_SETTINGS_KEY, value)
+	if config.save(TEXT_SCALE_SETTINGS_PATH) != OK:
+		push_warning("Unable to save question text scale preference.")
+
+
 func _set_scaled_label(label: Label, base_size: int, color: Color = Style.TEXT) -> void:
 	label.set_meta("question_base_font_size", base_size)
 	label.add_theme_color_override("font_color", color)