move scale factors to constraints

scenes/game/gameplays/tile.gd

@@ -170,9 +170,9 @@ func _update_visual_feedback() -> void:
 	var scale_multiplier: float
 
 	if is_selected:
-		# Selected: bright and 20% larger than original board size
+		# Selected: bright and larger than original board size
 		target_modulate = Color(1.2, 1.2, 1.2, 1.0)
-		scale_multiplier = 1.2
+		scale_multiplier = UIConstants.TILE_SELECTED_SCALE
 		DebugManager.log_debug(
 			(
 				"SELECTING tile (%d,%d): target scale %.2fx, current scale %s"
@@ -181,9 +181,9 @@ func _update_visual_feedback() -> void:
 			"Match3"
 		)
 	elif is_highlighted:
-		# Highlighted: subtle glow and 10% larger than original board size
+		# Highlighted: subtle glow and larger than original board size
 		target_modulate = Color(1.1, 1.1, 1.1, 1.0)
-		scale_multiplier = 1.1
+		scale_multiplier = UIConstants.TILE_HIGHLIGHTED_SCALE
 		DebugManager.log_debug(
 			(
 				"HIGHLIGHTING tile (%d,%d): target scale %.2fx, current scale %s"
@@ -194,7 +194,7 @@ func _update_visual_feedback() -> void:
 	else:
 		# Normal state: white and original board size
 		target_modulate = Color.WHITE
-		scale_multiplier = 1.0
+		scale_multiplier = UIConstants.TILE_NORMAL_SCALE
 		DebugManager.log_debug(
 			(
 				"NORMALIZING tile (%d,%d): target scale %.2fx, current scale %s"

scenes/ui/MainMenu.gd

@@ -87,7 +87,7 @@ func _update_visual_selection() -> void:
 	for i in range(menu_buttons.size()):
 		var button: Button = menu_buttons[i]
 		if i == current_menu_index:
-			button.scale = original_button_scales[i] * 1.1
+			button.scale = original_button_scales[i] * UIConstants.BUTTON_HOVER_SCALE
 			button.modulate = Color(1.2, 1.2, 1.0)
 		else:
 			button.scale = original_button_scales[i]

scenes/ui/SettingsMenu.gd

@@ -212,7 +212,7 @@ func _update_visual_selection() -> void:
 			if control == language_stepper:
 				language_stepper.set_highlighted(true)
 			else:
-				control.scale = original_control_scales[i] * 1.05
+				control.scale = original_control_scales[i] * UIConstants.UI_CONTROL_HIGHLIGHT_SCALE
 				control.modulate = Color(1.1, 1.1, 0.9)
 		else:
 			# Reset highlighting

scenes/ui/components/ValueStepper.gd

@@ -175,7 +175,7 @@ func set_current_value(value: String) -> void:
 func set_highlighted(highlighted: bool) -> void:
 	is_highlighted = highlighted
 	if highlighted:
-		scale = original_scale * 1.05
+		scale = original_scale * UIConstants.UI_CONTROL_HIGHLIGHT_SCALE
 		modulate = Color(1.1, 1.1, 0.9)
 	else:
 		scale = original_scale

src/autoloads/UIConstants.gd

@@ -11,8 +11,16 @@ const MIN_RESOLUTION := Vector2i(720, 480)
 
 # Animation constants
 const FADE_DURATION := 0.3
+
+# Scale factor constants for consistent UI interactions
 const BUTTON_HOVER_SCALE := 1.1
 const BUTTON_PRESS_SCALE := 0.95
+const UI_CONTROL_HIGHLIGHT_SCALE := 1.1
+
+# Game-specific scale constants
+const TILE_SELECTED_SCALE := 1.1
+const TILE_HIGHLIGHTED_SCALE := 1.1
+const TILE_NORMAL_SCALE := 1.0
 
 # UI spacing constants
 const UI_MARGIN := 20