🎨 Palette: Keyboard Accessibility for Notification Icon

[thirdeyenation]

💡 What: Added role="button", tabindex="0", aria-label, and keyboard event handlers (@keydown.enter and @keydown.space.prevent) to the .notification-toggle element in notification-icons.html. Also logged a critical learning in .jules/palette.md about making interactive div elements accessible.

🎯 Why: The notification toggle acted as a button (using @click) but was not keyboard navigable and didn't announce itself properly to screen readers. This micro-UX improvement ensures all users, regardless of how they navigate the interface, can access their notifications.

♿ Accessibility:

• Element is now keyboard focusable (tabindex="0")
• Element correctly identifies as a button to assistive tech (role="button")
• Screen readers have a clear description of its purpose (aria-label="View Notifications")
• Users can activate it using Enter or Space, just like a native <button>
• Spacebar scrolling is prevented when interacting with the element

📸 Verification: Successfully generated a Playwright screenshot verifying the component renders correctly and accepts focus.

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PR created automatically by Jules for task 16266996278690278247 started by @thirdeyenation

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