🎨 Palette: Accessible clear buttons and clock improvements

[schmug]

💡 What:

1. Added accessible "clear" buttons (SVG 'x' icon) to search/filter inputs in ProjectsApp, BlogApp, and Launcher components that appear when the user enters text.
2. Changed the clock implementation in Taskbar and StatusBar components from using span with aria-live="polite" to using semantic <time> elements with dateTime.
3. Created a UX journal (.Jules/palette.md) reflecting these learnings.

🎯 Why:

1. Search and filter inputs lack an easy, mouse-clickable/accessible way to clear their content if the user makes a mistake.
2. The aria-live="polite" attribute causes the clock to be continuously announced to screen readers every 30 seconds, causing significant annoyance/disruption. Semantic HTML (<time>) solves this without the disruption.

♿ Accessibility:

• The new clear buttons use proper aria-labels ("Clear filter" / "Clear search") and include the application's standard focus-visible outline styles for keyboard navigation.
• The clock change prevents constant unwanted announcements to assistive technologies.

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PR created automatically by Jules for task 10411474131948159762 started by @schmug

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