fix(button): restore pointer cursor on Button

Tailwind v4 dropped the Preflight rule that gave button/[role="button"] a
cursor: pointer, so the base Button showed the default arrow cursor while
components that hardcode astw:cursor-pointer (e.g. ActionPanel) did not.
Add astw:cursor-pointer to the buttonVariants base classes so all Button
instances are consistent. Disabled buttons keep the default cursor via the
existing astw:disabled:pointer-events-none.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: erickteowarang

.changeset/button-cursor-pointer.md

@@ -0,0 +1,10 @@
+---
+"@tailor-platform/app-shell": patch
+---
+
+Restore pointer cursor on `Button`. Tailwind v4 dropped the Preflight rule that
+gave `button`/`[role="button"]` a `cursor: pointer`, so the base `Button` showed
+the default arrow cursor while components that hardcode `astw:cursor-pointer`
+(e.g. `ActionPanel`) did not. Added `astw:cursor-pointer` to the `buttonVariants`
+base classes so all `Button` instances are consistent. Disabled buttons keep the
+default cursor via the existing `astw:disabled:pointer-events-none`.