chunk-3: translate 19 strings

[bestian]

Pull Request: chunk-3 — translate 19 strings

Summary

Adds 19 new localized strings (chunk 3) and wires them into admin overview, event page, agenda item, and template create/edit flows. All four locale files are updated (en, es, zh, zh_Hant_TW), and related presenter tests are adjusted for the new l10n keys.

Changes

New localized strings (19)

• Agenda / meeting: agendaItemWasDuplicated, pleaseRemoveDuplicateAnswers, agendaItemsWereRemoved, textTitle, video, image, question
• Onboarding: onboardingBrandSpaceSubtitle, onboardingCreateGuideSubtitle, onboardingHostEventSubtitle, onboardingInviteSomeoneSubtitle, onboardingCreateStripeAccountSubtitle
• Templates: updateTemplate, createAction, duplicateAction, removeTemplate, reactivate, titleCannotBeEmpty

Files touched

Area	Files
L10n	client/lib/l10n/app_en.arb, app_es.arb, app_zh.arb, app_zh_Hant_TW.arb
Presenters	admin/.../overview_presenter.dart, event_page_presenter.dart, agenda_item_presenter.dart, create_template_presenter.dart, edit_template_presenter.dart
Tests	overview_presenter_test.dart, agenda_item_presenter_test.dart

Stats

• 11 files changed, 124 insertions, 70 deletions

Testing

• Presenter tests updated to use the new l10n keys (overview and agenda item presenters).
• Manual check recommended for admin overview, event page, agenda item, and template create/edit in all supported locales (en, es, zh, zh_TW).

Co-Author

Co-Authored-By: Claude Opus 4.6 [email protected]