Optimize maker reputation rendering

[copp1723]

Summary

• aggregate maker swap reputation counts in a memoized selector
• reuse cached per-maker counts in offer cards instead of scanning every swap per card render

Refs #727.

Verification

• git diff --check
• COREPACK_HOME=/private/tmp/codex-corepack-cache YARN_GLOBAL_FOLDER=/private/tmp/codex-yarn-global YARN_CACHE_FOLDER=/private/tmp/codex-yarn-cache corepack yarn eslint src/store/selectors.ts src/renderer/components/pages/swap/swap/init/deposit_and_choose_offer/MakerOfferItem.tsx --quiet

Note

• Full tsc --noEmit is still blocked in this fresh clone because generated src/models/tauriModel.ts is absent.

[Einliterflasche]

Per our AI policy we require all communication to be exclusively human written. Until this requirement is met, we can't spare the effort to review this.