Gengchou v2.2.3

Gengchou v2.2.3

This maintenance release notices completed sign-ins sooner, keeps quota
windows aligned with provider data, and offers a more useful set of refresh
intervals.

Fixes

• Watch local credentials whenever a visible provider requires sign-in and
  refresh within seconds after the credentials change, without making usage
  requests on every watch tick. Credential checks now run off the UI thread,
  and WSL distribution discovery is cached to avoid repeated slow probes.
• Recheck immediately when credentials change during an in-flight poll, so a
  result based on an expired session cannot leave the sign-in warning visible
  until the next scheduled refresh.
• Preserve Codex quota-window durations reported by the provider instead of
  inferring them from the account plan.
• Prefer Antigravity's quota summary when it identifies the five-hour and
  weekly windows, and reject a per-model reset that cannot plausibly belong to
  a five-hour window. This prevents the same weekly quota from appearing as
  identical five-hour and seven-day rows.
• Replace the sparse 1, 5, 15, and 60-minute refresh choices with 1, 2, 5, 10,
  15, and 30 minutes. New and repaired settings default to five minutes; an
  existing one-hour setting is normalized to that default.

No settings or cache migration is required. Existing v2.2.2 installations can
update in place through Gengchou's built-in updater.