README: removed downtime apology; stated IDE is live; documented free tier with in-browser memory; aligned Getting started and Current status with live service wording.
README: closed-product positioning (no contributions); permanent free level; paid features framed as team/enterprise; link to tf-design-v2; roadmap/FAQ aligned; Contributing replaced with Project scope and feedback.
README: added Planned features (in development) — nested machines, sub/meta graphs, shared workspaces, reworked capabilities/effects; quality-before-ship note.