v0.17.0

• Action required if your config binds s in the shell context. s now
  opens the store picker, and a config that already binds it to another shell
  action fails startup with key "s" conflicts between actions ... in shell context. Rebind one of the two; docs/user-guide/key-bindings.md
  has an example.
• Added: a store picker. s from any tab lists every central task store
  registered on this machine with its name, project path and health, and marks
  the one in use. enter switches the running app to the highlighted store in
  place: the board, Docs tab, search, detail and launchers all follow, and the
  header names the new store. A store the registry knows but cannot open stays
  listed with the reason. esc returns to the tab you came from.
• Changed: starting with no task store opens the picker instead of exiting.
  taskmgr-ui run outside any project used to print no .tasks directory found
  and exit 1. It now opens on the picker with a toast saying why, as does an
  unknown --store-name. A store that exists but cannot be opened still exits
  1.
• Added: create a store from the picker. When started somewhere with no
  store, two rows above the registry offer to create a local store or a central
  store for that directory, with the ID prefix and registry name prefilled the
  way taskmgr init would choose them. The new store opens straight away.
• Changed: launchers are refused while the active store's project directory
  is missing. A central store whose project was moved or deleted still opens,
  but n, p and l used to run in a directory that was gone and blamed the
  launcher. Each now refuses with a toast naming the path, and the Detail
  footer says the launchers are off. A launcher with its own workdir still
  runs; e is unaffected.
• Columns now read newest change first. Not Ready, Ready, In Progress and
  the Docs tab order their rows by last change, most recent at the top, with
  priority as the tie-break. Before, priority came first and a P0 issue
  untouched for a month sat above the work you changed an hour ago. Done keeps
  its close-date order.
• Age markers show where the stale work starts. A muted divider reading
  older than 1 day and another reading older than 1 week sit before the
  first issue past that age, each with the count of issues below it. A column
  of fresh work shows no divider; a column where everything is stale shows
  both stacked at the top. Done draws none.
• Fixed: a write that a store hook refused was reported as
  update issue failed: update issue: unknown: ..., as if the app had faulted.
  It is now reported as a refusal with the hook's own reason, the way the
  taskmgr CLI reports it.
• Fixed: under --repo memory, a search page shorter than the full result set
  was reported as complete, so no further page was offered and the list was
  silently truncated.