gui: close workspaces from sidebar and menu

gui: untimed panes sort last in sidebar lead selection

gui: verb-tense run state in the sidebar

core: Pane::new constructor and lifecycle timing

gui: assert sidebar priority order in the display test

docs: inline-approvals design spec (implementation deferred)

server: self-printing schema (server.schema + CLI)

gui: priority-sort the workspace sidebar

ci: pre-commit fmt hook and GitHub workflow

agents: spec-kit adoption with constitution and pinned skill installer

fmt: normalize rustfmt drift so the fmt gate passes

docs: add AGENTS.md

gui: divider module and action registry out of App

server: typed params at dispatch, transitions behind Store

Add desktop integration for signaltty GUI

layouts: persist dragged dividers, split runs evenly

gui: add New Workspace dialog (folder, name, agent command)

gui: coalesce events and refresh only affected workspaces

gui: redesign the shell around libadwaita idioms

signaltty: native Linux workspace for parallel AI coding agents