Always show add-condition and delete buttons on touch devices

Use a pointer-coarse custom variant to bypass hover-dependent
visibility on devices without a precise pointer (phones, tablets).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/web/src/index.css

@@ -80,6 +80,8 @@
 	}
 }
 
+@custom-variant pointer-coarse (@media (pointer: coarse));
+
 @utility animate-confirm-pulse {
 	animation: confirm-pulse 300ms ease-out;
 }