0.48.0: Unified activity and Thread display

• Unified activity: The terminal keeps its stable connected, leader, or follower identity while work runs. Active work uses the same green Queue count as queued items, while Telegram typing projects every agent run—including local or autonomous work—into the assigned Thread and aggregate All target.
• Thread display: Settings now present the exact profile configuration values letters, names, directory-title, and directory-snake, place title case first, and omit the redundant live-preview block. Concurrent directory-title slot suffixes use one plain space instead of a middle-dot separator.
• Session-aware Thread binding: Operator live smoke confirmed same-session restoration and distinct concurrent sessions in one directory without duplicate Threads or letter slots, completing the remaining acceptance gate.