[FE-94] Wire the global command palette to the search API

[yusuftomilola]

Overview

frontend/hooks/useCommandPalette.ts already exists but has no backend to query. With assets, users, departments, and locations all searchable, a palette is the fastest way to navigate.

Tasks

• Wire the palette to the /search endpoint with debounced queries and React Query caching.
• Group results by type (assets, users, departments, locations) with keyboard navigation and Enter to open.
• Add quick actions ("New asset", "Import spreadsheet", "Go to reports").
• Show recent searches and recently viewed assets when the query is empty.
• Make it fully accessible: focus trap, aria-activedescendant, and screen-reader result announcements.
• Add a full search results page for queries with many matches.

Acceptance Criteria

• ⌘K / Ctrl+K opens the palette from any authenticated route.
• Results appear as the user types without flooding the API.
• The palette is fully keyboard-operable and screen-reader friendly.

Dependencies

Backend from [BE-105].

Notes for Contributors

Comment below to be assigned.