chore(i18n): remove dead rewards.* keys from zh-CN

[pftom]

Summary

Removes two dead i18n keys from apps/web/src/i18n/locales/zh-CN.ts that have no counterparts in en.ts and are not referenced anywhere in source.

• rewards.badge → 奖励中心
• rewards.refresh → 刷新

After the change, en.ts and zh-CN.ts have exactly the same set of 1052 keys, restoring full locale parity.

Why this is safe

Two pre-existing test assertions already guard that these raw key strings do not appear in rendered markup:

• apps/web/tests/home.test.tsx:322-323
• tests/web/home.test.tsx:402-403

expect(markup).not.toContain("rewards.badge");
expect(markup).not.toContain("rewards.refresh");

A repo-wide search (rg "rewards\.(badge|refresh)") finds zero positive usages outside the locale file itself and those guard assertions — so removing the translations cannot surface the keys at runtime.

Test plan

• rg "rewards\.badge|rewards\.refresh" outside zh-CN.ts shows only the negative guard tests.
• Locale-key diff: en.ts ↔ zh-CN.ts is now empty in both directions (1052 keys each).
• pnpm lint
• pnpm -C apps/web typecheck
• pnpm test (root vitest — covers tests/web/home.test.tsx)
• pnpm -C apps/web test (covers apps/web/tests/home.test.tsx)

Out of scope

• A type-level parity guard (e.g. const zhCN: typeof en) would prevent this drift in the future; deferred to a separate PR.
• The duplicate tests/web/home.test.tsx vs apps/web/tests/home.test.tsx files contain near-identical guard assertions; consolidation is out of scope.

---

Generated with the auto-github-contributor skill.

[lefarcen]

Hi @pftom! 🎉

Wow, what a clean and thoughtful chore PR—removing dead i18n keys while carefully documenting safety and test coverage. Love the thorough verification (rg search + test assertions + key parity check) 🙌

This looks solid—no issues found. Verified no usages outside zh-CN.ts except the guard tests you mentioned. Great out-of-scope notes on type-level guards and test consolidation too.

We'll merge promptly. Questions? Push here!

Join communities:

• Feishu: https://applink.feishu.cn/client/chat/chatter/add_by_link?link_token=90emc2e9-86cd-4723-b455-ca41b70f162d
• Discord: https://discord.gg/nexu

Thanks for making Nexu better!
Nexu Team