Diagnose and repair Codex Desktop local history/sidebar state when chats, projects, project labels, project counts, or project history are missing, empty, duplicated, or scrambled. Use for local Codex history recovery involving ~/.codex state, state_5.sqlite, .codex-global-state.json, projectless-thread-ids, thread-workspace-root-hints, sidebar-project-thread-orders, model_provider=headroom, or after Headroom/provider experiments appear to hide Codex history.
