feat(config): add canvas dimensions and padding properties for extended animation motions

catser/config.py

@@ -139,7 +139,28 @@ class Config:
         """Calculates cat height proportionally based on aspect ratio 121.2 / 92.4."""
         return int(round(self.cat_width * (CAT_BOX_HEIGHT / CAT_BOX_WIDTH)))
 
+    @property
+    def pad_x(self) -> int:
+        """Horizontal padding to accommodate tail wags (-15%) and paw extensions (+9%)."""
+        return int(round(self.cat_width * 0.20))
+
+    @property
+    def pad_y(self) -> int:
+        """Vertical padding to accommodate ears, stretch, and tail height."""
+        return int(round(self.cat_height * 0.20))
+
+    @property
+    def canvas_width(self) -> int:
+        """Total width of the transparent overlay canvas (symmetrical padding)."""
+        return int(round(self.cat_width * 1.40))
+
+    @property
+    def canvas_height(self) -> int:
+        """Total height of the transparent overlay canvas."""
+        return int(round(self.cat_height * 1.30))
+
     @property
     def coat(self) -> Coat:
         """Retrieves the active Coat instance."""
         return COATS.get(self.coat_name, COATS["ivory"])
+