chore(desktop): drop the app.css pointer-cursor rule once @codeatlasdev/ui ships it #117

atlas#116 adds one zero-specificity :where() rule to apps/desktop/src/app.css that gives enabled buttons and role controls cursor: pointer (project avatars in SpaceDots showed the arrow).

The kit is adding the same thing in @layer ca.reset: codeatlasdev/ui#552 (closes ui#549). When a released @codeatlasdev/ui has it:

• bump @codeatlasdev/ui in apps/desktop
• delete the rule in app.css and src/lib/pointerCursor.test.ts (replace with one test that a role=tab button computes pointer under the real kit CSS)
• remove the matching CHANGELOG wording if the rule is no longer ours

Blocker to check first: as written, #552's rule does not win in a native-feel app. base.css (@layer ca.base, a later layer than ca.reset) has html[data-ca-native] :is(button, a, nav, header, label, [role=button], [role=tab], [role=menuitem], [role=option]) { cursor: default } and Atlas calls nativeFeel(). Probe in Chromium with the kit's real base.css: data-ca-native off -> pointer, on -> default. Do not delete the app rule until a probe with data-ca-native set returns pointer.