move scale factors to constraints

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