🎨 Palette: Add tooltips for disabled bulk actions

[mapleleaflatte03]

💡 What
Added tooltips to the bulk action buttons (approve, stale, revoke, unresolved) in the Trust Ops queue when they are disabled.

🎯 Why
Disabled buttons swallow pointer events by default and don't show native title tooltips. When users see disabled buttons without knowing why, it creates a confusing UX. Adding a wrapper with a tooltip explains the required state ("Select one or more items first").

📸 Before/After
Before: The buttons were just greyed out, with no explanation on hover or focus.
After: When disabled, hovering over or focusing on the buttons shows a tooltip "Select one or more items first". When enabled, the tooltip goes away.

♿ Accessibility
Wrapped disabled buttons in a span with tabindex="0", allowing keyboard-only users to focus the wrapper and have screen readers announce the title. This tabindex is dynamically removed when the buttons become enabled to prevent a double-tab-stop issue.

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PR created automatically by Jules for task 8529921724311024066 started by @mapleleaflatte03

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