0.49.0: Unified fresh-session continuity

• /new: Classic and Threaded Mode now share one confirmed fresh-session flow. The settled callback deletes its dialog and publishes an expiring exact-target intent; a same- or cross-process successor preserves the classic chat or re-keys the Thread/slot/name, atomically claims once, then sends one terminal result. Identity mismatches fail closed.
• Command menus: Both Telegram command menus now keep the primary sequence /start, /compact, /new, /continue, /next; the niche /name command remains available but moves out of menus into the Thread display Settings guidance.
• Classic Settings: Hides both Thread display and Thread cleanup controls when Threaded Mode is unavailable, rather than exposing only half of the Thread-specific surface.
• Thread display: A current Thread with a manual /name override now appears as custom on the Settings row and detail heading; choosing any automatic mode clears the current Thread's override, reapplies that projection, and selects it again. Successful interactive rename/reset now settles its source before asynchronously publishing the result, so immediate /new cannot replay the consumed name after replacement; cancellation reports only its completed result.