Make health panel close button more prominent

Increased X button size to 1.25rem and added red hover color to make it more obvious and easier to close the panel.

Author: willuhmjs

src/lib/components/ui/HealthPanel.svelte

@@ -292,12 +292,20 @@
 		align-items: center;
 	}
 
+	.close-btn {
+		font-size: 1.25rem;
+	}
+
 	.close-btn:hover,
 	.refresh-btn:hover {
 		color: var(--text-primary);
 		background: rgba(255, 255, 255, 0.06);
 	}
 
+	.close-btn:hover {
+		color: var(--error);
+	}
+
 	.refresh-btn:disabled {
 		cursor: default;
 		opacity: 0.5;