Fix checkpoint popover not opening due to StandardTooltip wrapper conflict

The StandardTooltip component was incorrectly wrapping the PopoverTrigger,
which prevented the popover from opening. This was introduced in PR #5098
when standardizing tooltip delays.

The fix moves StandardTooltip inside PopoverTrigger (with asChild prop)
so that PopoverTrigger can properly control its child element while still
providing tooltip functionality.

This pattern is consistent with other components like ShareButton.

Author: daniel-lxs

webview-ui/src/components/chat/checkpoints/CheckpointMenu.tsx

@@ -61,13 +61,13 @@ export const CheckpointMenu = ({ ts, commitHash, currentHash, checkpoint }: Chec
 						setIsOpen(open)
 						setIsConfirming(false)
 					}}>
-					<PopoverTrigger asChild>
-						<StandardTooltip content={t("chat:checkpoint.menu.restore")}>
+					<StandardTooltip content={t("chat:checkpoint.menu.restore")}>
+						<PopoverTrigger asChild>
 							<Button variant="ghost" size="icon">
 								<span className="codicon codicon-history" />
 							</Button>
-						</StandardTooltip>
-					</PopoverTrigger>
+						</PopoverTrigger>
+					</StandardTooltip>
 					<PopoverContent align="end" container={portalContainer}>
 						<div className="flex flex-col gap-2">
 							{!isCurrent && (