Add semantic mini bars #173
- MA
## Summary - add an accessible semantic-tone `MiniBars` primitive to `@chopin/visuals` - safely handle empty, non-finite, negative, zero, and extreme finite inputs - retain the latest five finite samples and add four-tone design-audit coverage
## Scope MiniBars only. Progress bars, badges, metric deltas, tooltips, and product adoption remain separate slices.
## Stack - depends on #172
## Verification - focused tests: 31 pass - `bun test`: 1,492 pass, 2 PostgreSQL skips, 0 fail - `bun run types` - `bun run ci` - `bun run build` - `git diff --check`
MaggieAppletonreferenced this in Add accessible progress bars #174last month on GitHub
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