feat: archive sessions from the mobile session row

Add a two-step archive affordance to each mobile session row, mirroring the
project remove confirmation: tapping the archive icon arms an inline confirm
(with cancel), and confirming archives the session. Only one row can be in
the confirming state at a time.

Also relabel the project remove confirmation from "Delete" to "Close"
across all locales, since removing a project closes it from the app rather
than deleting anything.

packages/ui/src/lib/i18n/messages/ko.ts

@@ -64,9 +64,11 @@ export const dict: Record<I18nKey, string> = {
   'mobile.sessions.moveDownAria': '{label} 아래로 이동',
   'mobile.sessions.removeProjectAria': '{label} 제거',
   'mobile.sessions.cancelRemoveProjectAria': '{label} 제거 취소',
-  'mobile.sessions.confirmRemoveProject': '삭제',
+  'mobile.sessions.confirmRemoveProject': '닫기',
   'mobile.sessions.confirmRemoveProjectAria': '{label} 제거 확인',
   'mobile.sessions.toast.projectRemoved': '{label} 제거됨',
+  'mobile.sessions.archiveSessionAria': '{title} 보관',
+  'mobile.sessions.cancelArchiveAria': '{title} 보관 취소',
   'mobile.sessions.editProjectAria': '{label} 편집',
   'mobile.projectEdit.worktreesTitle': '워크트리',
   'mobile.projectEdit.worktreesEmpty': '이 프로젝트에는 아직 워크트리가 없습니다.',