Purpose

Simplify manufacturer searches by using the existing search field instead of a separate exact-match filter.

Changes

• Remove the manufacturer filter and unused frontend logic.
• Add a reusable search component with color variants and a clear button.
• Improve the mobile filter dialog.
• Reuse category navigation with Lucide icons and an optional “View all” link.
• Update the affected test.

Related issues

Closes #96.

Verification

• npm run build: passed.
• npm run lint: passed.
• Vitest with Node 24.21.0: all 24 tests passed.

Screenshots

To be added for the updated search, filters, and category navigation.

Checklist

• I have reviewed my own changes.
• The changes meet the linked issue's acceptance criteria, where applicable.
• I have verified the changes and recorded the results above.
• I have added or updated tests where needed.
• I have updated documentation where needed.
• I have included screenshots for visual changes, or marked them not applicable.