Fix text zoom not actually syncing, and expose it in Settings

Two real gaps meant the account-synced zoom (from the previous
"sync through the account" change) never reached the screen:
_load_cache() updated AccountProfileService.preferences but never
emitted profile_changed, so question_player.gd/ccs_service.gd (already
built and listening before login even happens) never found out a
cached value had loaded. And nothing forced a server refresh
right after login - it only fired if the user happened to open the
profile/progress screen, so a fresh device/session had no path to
the true synced value at all.

main.gd now calls AccountProfileService.refresh() once per login
(not on every silent token refresh) so the real preferences GET
always runs right after signing in, on any device.

Also added Question bank/CCS case text size steppers to the Settings
screen next to dark mode, per user request, reusing the same
AccountProfileService/CCSService plumbing as the in-screen A-/A+
buttons.

scripts/autoload/account_profile_service.gd

@@ -318,6 +318,7 @@ func _on_auth_changed() -> void:
 	else:
 		account = {}
 		preferences = _default_preferences()
+		profile_changed.emit()
 
 
 func _cache_path() -> String:
@@ -331,6 +332,7 @@ func _load_cache() -> void:
 	if typeof(parsed) == TYPE_DICTIONARY:
 		preferences = parsed.get("preferences", _default_preferences())
 		preferences_pending = bool(parsed.get("pending", false))
+		profile_changed.emit()
 
 
 func _save_cache(pending: bool) -> void:

scripts/ui/main.gd

@@ -5,6 +5,7 @@ const Brand := preload("res://scripts/ui/medmind_style.gd")
 const NavigationRoutes := preload("res://scripts/ui/navigation_routes.gd")
 
 var screens := {}
+var _account_profile_synced := false
 var header_panel: PanelContainer
 var header_title: Label
 var environment_badge: Label
@@ -755,6 +756,12 @@ func open_legal_document(kind: String) -> void:
 
 func _on_auth_changed() -> void:
 	_refresh_header_controls()
+	if AuthState.is_logged_in:
+		if not _account_profile_synced:
+			_account_profile_synced = true
+			AccountProfileService.refresh()
+	else:
+		_account_profile_synced = false
 	if AuthState.is_logged_in and AuthState.requires_legal_acceptance and current_screen_name not in ["login", "legal_consent"]:
 		show_screen("legal_consent")
 

scripts/ui/settings_screen.gd

@@ -1,10 +1,15 @@
 extends VBoxContainer
 
 const Brand := preload("res://scripts/ui/medmind_style.gd")
+const QUESTION_TEXT_SCALE_MIN := 0.85
+const QUESTION_TEXT_SCALE_MAX := 1.35
+const QUESTION_TEXT_SCALE_STEP := 0.1
 
 var main: Control
 var theme_toggle: CheckButton
 var sound_toggle: CheckButton
+var question_scale_value_label: Label
+var ccs_scale_value_label: Label
 
 
 func _ready() -> void:
@@ -52,6 +57,9 @@ func _ready() -> void:
 	sound_toggle.toggled.connect(UISoundService.set_sounds_enabled)
 	content.add_child(sound_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"))
+
 	var legal_panel := PanelContainer.new()
 	legal_panel.custom_minimum_size = Vector2(520, 0)
 	legal_panel.size_flags_horizontal = Control.SIZE_SHRINK_BEGIN
@@ -74,11 +82,73 @@ func _ready() -> void:
 		legal_content.add_child(button)
 
 	UIThemeService.theme_changed.connect(_on_theme_changed)
+	AccountProfileService.profile_changed.connect(_refresh_text_scale_labels)
+	CCSService.text_scale_changed.connect(_refresh_text_scale_labels)
+	_refresh_text_scale_labels()
 
 
 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())
+	_refresh_text_scale_labels()
+
+
+func _build_text_scale_row(label_text: String, kind: String) -> HBoxContainer:
+	var row := HBoxContainer.new()
+	row.custom_minimum_size = Vector2(0, 52)
+	row.add_theme_constant_override("separation", 12)
+
+	var label := Label.new()
+	label.text = label_text
+	label.size_flags_horizontal = Control.SIZE_EXPAND_FILL
+	row.add_child(label)
+
+	var smaller := Button.new()
+	smaller.text = "A-"
+	smaller.tooltip_text = "Decrease text size"
+	smaller.custom_minimum_size = Vector2(44, 44)
+	row.add_child(smaller)
+
+	var value_label := Label.new()
+	value_label.custom_minimum_size = Vector2(56, 0)
+	value_label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
+	row.add_child(value_label)
+
+	var larger := Button.new()
+	larger.text = "A+"
+	larger.tooltip_text = "Increase text size"
+	larger.custom_minimum_size = Vector2(44, 44)
+	row.add_child(larger)
+
+	if kind == "question":
+		question_scale_value_label = value_label
+		smaller.pressed.connect(_adjust_question_text_scale.bind(-QUESTION_TEXT_SCALE_STEP))
+		larger.pressed.connect(_adjust_question_text_scale.bind(QUESTION_TEXT_SCALE_STEP))
+	else:
+		ccs_scale_value_label = value_label
+		smaller.pressed.connect(_adjust_ccs_text_scale.bind(-CCSService.TEXT_SCALE_STEP))
+		larger.pressed.connect(_adjust_ccs_text_scale.bind(CCSService.TEXT_SCALE_STEP))
+	return row
+
+
+func _adjust_question_text_scale(delta: float) -> void:
+	var current: float = AccountProfileService.preferences.get("questionTextScale", 1.0)
+	var next_scale: float = clamp(current + delta, QUESTION_TEXT_SCALE_MIN, QUESTION_TEXT_SCALE_MAX)
+	AccountProfileService.update_text_scale(next_scale)
+	_refresh_text_scale_labels()
+
+
+func _adjust_ccs_text_scale(delta: float) -> void:
+	CCSService.adjust_text_scale(delta)
+	_refresh_text_scale_labels()
+
+
+func _refresh_text_scale_labels() -> void:
+	if question_scale_value_label != null:
+		var question_scale: float = AccountProfileService.preferences.get("questionTextScale", 1.0)
+		question_scale_value_label.text = "%d%%" % round(question_scale * 100)
+	if ccs_scale_value_label != null:
+		ccs_scale_value_label.text = "%d%%" % round(CCSService.text_scale * 100)
 
 
 func _on_theme_toggled(enabled: bool) -> void: