Lemenzo Clock v2.6 — final UI polish

- New Timer labels are fully localized in EN/DA/DE/NO/SV/ES.
- Timer focus name and 1-hour preset no longer bypass locale resources.
- All app-owned ClockActivity dialogs are routed through Lemenzo dark dialog styling
  or explicitly style themselves on show when custom positive-button validation is needed.
- No main feature logic was changed.
- Existing premium controls, bottom cross-fade navigation and safe insets are retained.