Fix habit cell morphing on focus in Chrome browsers

Prevent visual glitch where habit cells would shrink and borders would
   morph during NumberFlow animations when interacting via keyboard (shift
   key). Added focus-visible:outline-none to suppress global outline style
   that was causing layout shifts in Chrome's rendering engine.

src/routes/(app)/habits/CounterHabitButton.svelte

@@ -142,6 +142,7 @@
 	class={cn(
 		'z-10 flex h-12 w-full shrink-0 items-center justify-center shadow-sm select-none hover:cursor-pointer transition-all duration-200',
 		'animate-in fade-in-5 duration-300',
+		'focus-visible:outline-none',
 		direction === 'end' ? 'slide-in-from-right-12' : 'slide-in-from-left-12',
 		checked
 			? 'bg-primary text-primary-foreground border border-primary hover:bg-primary/90'