0.21.0

Added

• Drag a tab to reorder the strip. Press a tab and move it sideways; a
  marker shows where it will land, and the new order survives a restart. A
  plain click still selects, double-click still renames, and the close button
  still closes — the drag only starts once the pointer has actually moved.
  With more tabs than fit, holding the tab near either edge scrolls the strip.
  Escape, or switching away from the window, drops the drag and leaves the
  order as it was. Unnamed tabs keep numbering by position, so dragging
  "Terminale 3" to the front makes it "Terminale 1" — the same thing closing
  a tab already does. Name a tab if you want its label to stay put.

Changed

• The README now leads multi-agent use with named sessions. Running several
  interactive agents side by side, each renamed with /rename, needs nothing
  from Cerberus and every permission prompt still reaches your phone with the
  agent's name on it — so that's the path the docs show first. The headless
  worker setup with live follower panes is unchanged and still documented,
  now scoped to what it's for: batch runs of agents that never prompt.

Full changelog: v0.20.0...v0.21.0