Collapse hover-only buttons to zero width when hidden

Edit and add-condition buttons now take no space when not hovered,
eliminating the gap between name and condition icons. They slide in
smoothly on hover with a 150ms transition.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/web/src/components/combatant-row.tsx

@@ -112,7 +112,7 @@ function EditableName({
 				onClick={startEditing}
 				title="Rename"
 				aria-label="Rename"
-				className="inline-flex shrink-0 items-center rounded p-0.5 text-muted-foreground opacity-0 pointer-coarse:opacity-100 transition-colors transition-opacity hover:bg-hover-neutral-bg hover:text-hover-neutral focus:opacity-100 group-hover:opacity-100"
+				className="inline-flex pointer-coarse:w-auto w-0 shrink-0 items-center overflow-hidden pointer-coarse:overflow-visible rounded p-0.5 text-muted-foreground opacity-0 pointer-coarse:opacity-100 transition-all duration-150 hover:bg-hover-neutral-bg hover:text-hover-neutral focus:w-auto focus:overflow-visible focus:opacity-100 group-hover:w-auto group-hover:overflow-visible group-hover:opacity-100"
 			>
 				<Pencil size={14} />
 			</button>

apps/web/src/components/condition-tags.tsx

@@ -103,7 +103,7 @@ export function ConditionTags({
 				type="button"
 				title="Add condition"
 				aria-label="Add condition"
-				className="inline-flex items-center rounded p-0.5 text-muted-foreground opacity-0 pointer-coarse:opacity-100 transition-colors transition-opacity hover:bg-hover-neutral-bg hover:text-hover-neutral focus:opacity-100 group-hover:opacity-100"
+				className="inline-flex pointer-coarse:w-auto w-0 items-center overflow-hidden pointer-coarse:overflow-visible rounded p-0.5 text-muted-foreground opacity-0 pointer-coarse:opacity-100 transition-all duration-150 hover:bg-hover-neutral-bg hover:text-hover-neutral focus:w-auto focus:overflow-visible focus:opacity-100 group-hover:w-auto group-hover:overflow-visible group-hover:opacity-100"
 				onClick={(e) => {
 					e.stopPropagation();
 					onOpenPicker();