Add dashboard tool status filters - #162

Summary

• add All, Placed, and Unassigned quick filters to the dashboard Tools section, with live counts and accessible pressed states
• compose the status filters with the existing search and sort controls, including a clear empty-results state
• centralize tool-status classification in tested selector helpers
• keep the glass border present in active and inactive filter states so the dashboard and project tool filters no longer shift when clicked

Behavior

Placed includes tools assigned to a project and present in one of that project's bins. Unassigned includes tools that belong to no project. Assigned tools that still need a bin remain available under All.

The filter-button movement was caused by inactive buttons using glass-sm, which adds a 1px border, while the active state removed that class. Keeping glass-sm in both states preserves the button geometry while allowing the active background and text colors to change.

Validation

• pnpm exec vitest run — 15 test files and 118 tests passed
• pnpm exec eslint src/app/page.tsx src/app/projects/[id]/page.tsx — no errors; two existing warnings
• pnpm exec tsc --noEmit
• pnpm exec next build

Code and PR drafted with Codex