refactor(client): improve SearchBox type safety and code structure

[lcomplete]

Summary

• Add explicit TypeScript types for props and autocomplete handlers
• Extract helper functions (getSearchOptionsByKeywords, buildNextSearchState) to reduce component complexity
• Use initial state functions for useState hooks for better initialization
• Simplify event handlers and remove redundant logic
• Clean up commented code and improve readability

Test plan

• Verify search box renders correctly in both default and large variants
• Test search functionality with text input
• Test autocomplete option selection
• Verify keyboard navigation (Tab, Enter) works correctly
• Test search options filtering

🤖 Generated with Claude Code

[augmentcode]

🤖 Augment PR Summary

Summary: Refactors the client SearchBox to improve TypeScript type-safety and reduce component complexity.

Changes:

• Adds an explicit SearchBoxProps type and typed MUI autocomplete handler signatures
• Extracts helper utilities (getSearchOptionsByKeywords, buildNextSearchState) to simplify selection/state logic
• Uses initializer functions for useState to derive initial query text/options from URL params and props
• Memoizes derived values from URL params / selected keywords to reduce redundant computations
• Simplifies keyboard and input event handlers (Tab to accept first suggestion, Enter to submit)
• Consolidates className construction for large/default variants and removes commented dead code

Technical Notes: Maintains URL-driven state via useSearchParams and builds the op query param from a precomputed keyword set to avoid recomputing defaults on submit.

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[augmentcode]

Review completed. 1 suggestion posted.

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[augmentcode]

Rendering option.label here replaces the prior getLocalizedLabel(...) mapping, but defaultSearchOptions labels are hard-coded English strings (e.g., "Already Read", "Unsorted"), so this likely drops i18n for these option names.

Severity: medium

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