🎨 Palette: Enhanced Search UX and Accessibility

[Woschj]

Refactored the global list view template (shared/list_base.html) to provide a more intuitive and accessible search experience.

Key improvements:

• Keyboard Shortcuts: Added / to focus the search input and Esc to clear it.
• Visual Feedback: Added a "No results found" row that appears when filters return no data, including a "Reset all" button.
• Accessibility: Implemented an aria-live status region to announce search results to screen readers and added shortcut hints in placeholders.
• DRY Refactoring: Centralized filtering logic in the base template, allowing child templates like Workers, Tools, and Consumables to benefit from synchronized search and dropdown filters without redundant code.
• Logic Sync: Search and dropdown filters now work together (logical AND), ensuring accurate result counts and proper visibility management.

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PR created automatically by Jules for task 11751168601705758802 started by @Woschj

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