🎨 Palette: Enhance Start Menu clear search button UX and Accessibility

[rdtect]

• 💡 What: Replaced the raw text "x" in the Start Menu search's clear button with a semantic SVG icon and added an aria-label.
• 🎯 Why: The previous clear button was just a textual "x" which felt unpolished and lacked screen reader support. Using an SVG aligns better with standard UI patterns, and the aria-label ensures visually impaired users know what the button does.
• 📸 Before/After: Visual changes were captured during verification (replaced "x" with a standard X SVG icon).
• ♿ Accessibility: Added aria-label="Clear search" to the icon-only button, addressing an accessibility gap for screen readers. Added a learning about this to .Jules/palette.md.

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PR created automatically by Jules for task 17959882031074233361 started by @rdtect

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[Copilot]

Pull request overview

Improves the Start Menu search “clear” affordance by replacing a raw text x with an icon-only SVG button and adding an accessible label for screen readers.

Changes:

• Replaced the clear-search button content from text (x) to an SVG “X” icon.
• Added aria-label="Clear search" to the icon-only clear button.
• Added an internal note in .Jules/palette.md about icon-only button accessibility.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
src/lib/shell/StartMenu.svelte	Updates the clear-search button UI to use an SVG icon and adds an aria-label for accessibility.
dev_server.log	Adds a captured local dev server log output.
.Jules/palette.md	Documents an accessibility learning/action for icon-only buttons.

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