🎨 Palette: Add tooltip wrapper for disabled bulk action buttons

[mapleleaflatte03]

💡 What: Added a span wrapper around the disabled bulk action buttons in trust-ops.html to provide a native title tooltip explaining why the button is disabled. The tabindex and title attributes on the wrapper are dynamically removed via meridian.js when the button becomes enabled.

🎯 Why: Native title attributes do not work on disabled buttons because they do not capture pointer events. Without this explanation, users might not know why the bulk action buttons are unavailable.

📸 Before/After: Before, hovering the disabled buttons did nothing. After, hovering them shows a tooltip like "Select at least one item to approve". When an item is selected, the tooltip is removed to avoid redundant information.

♿ Accessibility: Added tabindex="0" to the wrapper when the button is disabled so that keyboard users can access the tooltip explaining the disabled state. The tabindex is dynamically removed when the button is enabled to prevent a confusing double tab stop (one for the wrapper, one for the button).

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PR created automatically by Jules for task 10586542972535773107 started by @mapleleaflatte03

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