#95 UI: Search Input Component

Create reusable search input component with debounce. Component: api/ui/templates/components/search_input/ Files: - search_input.html - search_input.css - search_input.js Features: - Input: - Search icon - Placeholder text - Clear button (X) - Loading spinner during search - Debounce: - Configurable delay (default 300ms) - Cancel pending search on clear - Keyboard: - Enter to search immediately - ESC to clear - Tab focus styles - States: - Empty - Typing (debounce active) - Searching (loading) - Has value JavaScript API: - new SearchInput(element, config) - searchInput.setValue(value) - searchInput.clear() - searchInput.onSearch(callback) Integration: - URL parameter sync (?search=query) - Works with DataTable filtering With ultra attention to details and correctness. Before closing: write comment summarizing implementation with screenshot.