fix(code): make toast close button clickable

[MarconLP]

Summary

• The X (close) button on toasts was unresponsive — clicking it did nothing.
• Root cause: sonner's pointerdown handler on the toast <li> only short-circuits when event.target.tagName === 'BUTTON'. Clicking the X made the SVG icon the event target, so sonner called setPointerCapture on the SVG and engaged its swipe logic, swallowing the click before the IconButton's onClick could fire sonnerToast.dismiss(id).
• Fix: add pointer-events-none to the <XIcon> so the click target is always the button itself, which hits sonner's BUTTON early-return.
• Applies to every toast type (success / error / info / warning), not just "You're on the latest version" — that one was just easy to reproduce because it's a sticky non-loading toast.

Test plan

• Trigger "You're on the latest version" toast (Check for updates → already up to date) and click the X — toast dismisses.
• Trigger any error/success/info/warning toast and click the X — toast dismisses.
• Toasts with an action label still dismiss when the action is clicked.

[greptile-apps]

_{Reviews (1): Last reviewed commit: "fix(code): make toast close button click..." | Re-trigger Greptile}

[adboio]

Merge activity

• May 14, 2:45 AM UTC: @adboio merged this pull request with Graphite.