v0.95.0

Added

• The three session pickers say what they are, and name the default they fall back on (task 659). Agent,
  Model and Effort now carry a visible label in the list toolbar, under the task title and among the
  commands of the modal. Where nothing was chosen the selector reads Default (opus) and the badge shows
  (opus) in brackets, instead of a bare CLI default: brackets mean «nobody chose it here, and this is what
  the session will run on». griglia:check prints it the same way ({agent: claude, model: (opus)}).
• Config agent_default_model / agent_default_effort (GRIGLIA_AGENT_DEFAULT_MODEL,
  GRIGLIA_AGENT_DEFAULT_EFFORT, same shape as agent_models): tell the board which value the agent CLI —
  or the worker, through GRIGLIA_WORKER_MODEL/GRIGLIA_WORKER_EFFORT — already starts with, and it names it
  everywhere. A caption only: the board never sends it, so each worker keeps its own default. A value the
  agent no longer offers is ignored.

Full changelog: v0.94.0...v0.95.0