[Wangnov]

Coordination update (2026-11-06): keeping this PR as a draft while #308 provides the broader Simplified Chinese catalog work. The independent connection/pairing state fixes have been extracted into #317. The Traditional Chinese translations remain here and can be adapted to #308 after it lands; this draft is not intended as a competing catalog implementation.

Pairing and connecting currently remain in English on Chinese-language devices. This adds app-owned String Catalogs for English, Simplified Chinese (zh-Hans), and Traditional Chinese (zh-Hant), covering the Mac pairing window, Devices settings, permission guidance and menu entry points, plus the iOS connection, pairing and scanning flows. Related to #237.

Dynamic names and plural forms use native localization. Connection-screen presentation identity is separated from displayed text; protocol identifiers, host-provided unknown/update messages, device names and user-created group names keep their existing meaning. The existing SwiftPM packaging flow is retained, with explicit catalog compilation and a CI check of the assembled Mac app. A compiler-based synchronization command and translation notes are included.

This is an initial localization slice: streaming controls and the remaining settings copy are not fully translated. The fork's Xcode app migration and shared-device-store refactor are deliberately outside this PR.

Validation:

• All 55 existing pure-check suites passed; no mutation-test runs were added.
• Mac SwiftPM build and actual ad-hoc app packaging passed; existing app previews were rendered in all three languages.
• iOS Debug and Release arm64 simulator-target builds passed.
• Actual app resources were checked for both Chinese variants, permission descriptions, dynamic values, English fallback and plural forms; catalog synchronization was repeatable.

Keeping this as a draft pending iOS UI/device validation and translation review. A zh-Hant terminology review would be welcome; the current translations use Taiwanese terminology.