v0.93.0

Added

• The board chooses the model and the reasoning effort of a session (and shows them). Declare what each
  agent offers — GRIGLIA_AGENT_MODELS="claude:opus,sonnet;codex:gpt-5", GRIGLIA_AGENT_EFFORTS="low,medium,high" —
  and a list picks its default while any task overrides it, from the badge under its title or from the commands
  of its modal, next to the agent. The effective value is always visible: on the row, in the modal, and next to
  the title in griglia:check ({agent: claude, model: opus, effort: high}). The persistent worker reads it
  from --worker-json and passes it to the CLI, falling back to its own --model/--effort. Without the two
  variables nothing changes: no selector, and every session keeps the CLI's default.

Full changelog: v0.92.1...v0.93.0