Fleet Runner v0.8.1

Reliability release for the dispatch loop (Control → your local Zellij) + in-place auto-update. Fixes: reliable verified dispatch (ensure tab → launch agent if none → inject → confirm), fuzzy tab matching (revampit→revamp-it), actionable detached-session errors, stale-backlog purge, self-healing bridge. Pairs with the web app's Terminal tab, real Activity timeline, Light/Dark/Auto switch, and dark-first Geist redesign.