Unify hover effects via semantic theme tokens

Replace one-off hover colors with hover-neutral/hover-destructive tokens
so all interactive elements respond consistently to theme changes. Fix
hover-neutral-bg token value (was identical to card surface, making hover
invisible on card backgrounds) to a semi-transparent primary tint. Switch
turn nav buttons to outline variant for visible hover feedback. Convert HP
popover damage/heal to plain buttons to avoid ghost variant hover conflict
with tailwind-merge.

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

apps/web/src/components/turn-navigation.tsx

@@ -23,6 +23,7 @@ export function TurnNavigation({
 	return (
 		<div className="flex items-center gap-3 rounded-md border border-border bg-card px-4 py-3">
 			<Button
+				variant="outline"
 				size="icon"
 				onClick={onRetreatTurn}
 				disabled={!hasCombatants || isAtStart}
@@ -52,6 +53,7 @@ export function TurnNavigation({
 					className="text-muted-foreground"
 				/>
 				<Button
+					variant="outline"
 					size="icon"
 					onClick={onAdvanceTurn}
 					disabled={!hasCombatants}