update

app.py

@@ -64,7 +64,7 @@ observe_js = """
 			const target = entry.target
 			const newWidth = entry.contentRect.width
 			
-			target.style.backgroundSize = `${newWidth}px auto`;
+			target.style.backgroundSize = `${newWidth}px`;
 			target.style.setProperty("--indication-dot-size", `${newWidth*0.025}px`);
 			target.style.setProperty("--indication-text-size", `${newWidth*0.035}px`);