Add zh-CN to locales_config.xml so the community Simplified Chinese
translation (values-zh-rCN, already committed via Weblate, ~27%) is
selectable in the in-app language picker and Android's per-app-language
settings. Untranslated strings fall back to English.
Fill in the 2.14.0 changelog, which only documented #37: add the three
feature PRs that also landed on this branch — .ics restore + per-calendar
export (#32), Month week numbers (#25), edit-screen title wrapping (#33) —
plus a note for the new Chinese translation, the missing [#N] link refs,
and the re-synced fastlane en-US changelog.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>