🎨 Palette: Add accessible clear buttons to search inputs

[schmug]

💡 What: Added an accessible 'clear' (X) button to the search and filter inputs across the application (Launcher, ProjectsApp, and BlogApp).

🎯 Why: When users are typing a long search query and want to start over, it's cumbersome to manually highlight and delete the text. Providing a clear button improves efficiency. Managing focus to return to the input upon clearing ensures continuous, accessible keyboard interaction.

📸 Before/After:
The clear button appears only when there is input text. It uses the lucide-react X icon and aligns neatly inside the input container.

♿ Accessibility:

• Added aria-label="Clear search" for screen readers.
• Ensured keyboard accessibility with focus-visible ring styling.
• Restores focus to the search input element when clicked, allowing users to keep typing immediately.
• Added type="button" to ensure it doesn't accidentally trigger a form submission.

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PR created automatically by Jules for task 1057004159306697568 started by @schmug

[google-labs-jules]

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[schmug]

Superseded by #127 (merged to main), which consolidated the best of the duplicate Bolt/Sentinel/Palette scheduled-agent PRs into one reviewed change. Closing as duplicate.

[google-labs-jules]

Superseded by #127 (merged to main), which consolidated the best of the duplicate Bolt/Sentinel/Palette scheduled-agent PRs into one reviewed change. Closing as duplicate.

Understood. Acknowledging that this work is superseded by #127 and stopping work on this task.