Redesign exam and CCS experiences

scripts/ui/ccs_review.gd

@@ -1,6 +1,7 @@
 extends VBoxContainer
 
 const Style := preload("res://scripts/ui/ui_style.gd")
+const Brand := preload("res://scripts/ui/medmind_style.gd")
 var main: Control
 var title: Label
 var score_body: RichTextLabel
@@ -170,6 +171,6 @@ func _on_theme_changed(_is_dark_mode: bool) -> void:
 
 func _refresh_theme_button() -> void:
 	if theme_button == null: return
-	theme_button.text = "☀" if theme_service.is_dark_mode() else "☾"
+	Brand.set_theme_toggle_icon(theme_button, theme_service.is_dark_mode())
 	theme_button.tooltip_text = "Switch to light mode" if theme_service.is_dark_mode() else "Switch to dark mode"
 	Style.style_chip(theme_button, Style.CYAN)