chore(ios): GitHub Actions test workflow and complete Vietnamese localization

[datlechin]

Summary

Two independent items bundled because each is small and they touch separate file trees.

CI: iOS test workflow

New .github/workflows/ios-tests.yml runs xcodebuild test -only-testing:TableProMobileTests on:

• Pull requests touching TableProMobile/**, Packages/TableProCore/**, Libs/**, or the workflow file itself
• Pushes to main matching the same paths
• Manual dispatch

Setup mirrors the existing build.yml: macos-26 runner, Xcode 26.5-beta, scripts/download-libs.sh --force for the static libs, then resolve packages and run tests on the iPhone 17 Pro / iOS 26.5 simulator. Output is piped through xcbeautify for readable GitHub-Actions logs, and TestResults.xcresult is uploaded as an artifact for 7 days for diagnostics.

-skipPackagePluginValidation matches the local build command in CLAUDE.md. CODE_SIGNING_ALLOWED=NO skips signing on the simulator runner where it isn't needed.

Vietnamese localization

TableProMobile/Localizable.xcstrings now has vi translations for all 312 keys (was 246). 66 newly-added Vietnamese translations cover:

• Buttons, navigation titles, tab labels (Save, Cancel, Connections, Settings, etc.)
• Connection lifecycle states (Connected, Disconnected, Reconnecting…)
• Settings sections (Privacy, Security, Sync, New Connections)
• Search, filter, sort, pagination, accessibility hints
• Onboarding copy, confirmation dialog messages, error recovery hints
• Format strings preserve the original placeholders (%@, %lld, %d)

Translation choices follow common Vietnamese tech conventions: SQL/dev terms (SELECT, BLOB, Schema) stay English; everyday UI labels use natural Vietnamese (Kết nối, Truy vấn, Bảng, Khóa chính).

JSON serializer uses separators=(',', ' : ') to match Xcode's xcstrings format (space before colon), so the diff stays focused on actual translation additions instead of whole-file reformatting.

Test plan

• Open PR - iOS Tests workflow runs and passes
• On the iOS Simulator, change device language to Vietnamese (Settings → General → Language & Region) → relaunch TablePro → verify navigation, settings, dialogs read in Vietnamese
• Strings with format args (e.g. "Connecting to %@...", "Row %d of %d") still substitute correctly