[VargaJoe]

Browser tabs previously kept the generic sensenet title after opening a repository. Set the authenticated tab title to the same display name as its Recent entry: the browser-local custom name when present, otherwise the existing host/port/path name.

Reuse one display-name helper for the chooser and tab title. Read the active RepositoryContext rather than global repository selection, update after local or cross-tab renames, and restore the base title when leaving the authenticated application. Authentication, callbacks, token storage and connection metadata format are unchanged.

Validation at aab4dc0:

• 160/160 focused authentication, chooser, connection and title tests passed across 16 suites, including six new title tests.
• SNAuth production webpack build passed with the existing asset-size warnings. Scoped ESLint, formatting, diff checks and commit hooks passed.
• Isolated real Chrome passed eight title/storage checks with no page errors, using the unchanged title component/hook/store and synthetic context. This was not a full application or live IdP acceptance run.
• Independent code review: GO, no actionable findings.

Targets feature/sn-auth-package-extraimprovements; no merge or deployment included.