Port upstream 0.55.0: clarify Chinese quota labels

[Finesssee]

Summary

• port upstream CodexBar v0.55.0 Simplified Chinese quota wording from Clarify five-hour quota wording in Simplified Chinese steipete/CodexBar#3070
• when a quota is the generic Session label and its real cadence is five hours, render 5 小时 for Simplified Chinese
• preserve the generic session wording for non-quota/conversation surfaces and other languages

Upstream evidence

• target release: v0.55.0
• upstream commit: 1f77a5513 / Clarify five-hour quota wording in Simplified Chinese steipete/CodexBar#3070

Validation

• git diff --check -> pass
• frontend test execution remains blocked locally by the broken pnpm/Corepack shim and is deferred to hosted CI/final frontend gate

Scope

Isolated localization/presentation port. No provider semantics or version bump.

[Finesssee]

Thermo-nuclear review

The initial port only special-cased the five-hour duration, while upstream steipete#3070 intentionally derives any whole-hour session quota from 1 through 12 hours and maps the weekly duration separately. That parity gap is now fixed, with focused Simplified Chinese tests for an arbitrary hourly duration and the weekly mapping. MenuCard tests pass 24/24, TypeScript no-emit typecheck passes, and the change remains narrowly scoped.

Verdict: APPROVED.