orca/docs/split-groups-rollout-pr6.md

Split Groups PR 6: Enable Split Groups

This branch turns split groups on after the earlier model, lifecycle, restore, and renderer-ownership branches are in place.

Scope:

• remove the temporary rollout gate from Terminal.tsx
• make the split-group ownership path the active renderer path
• keep only the small bootstrap fallback for cases where no layout exists yet

What Is Actually Hooked Up In This PR:

• split groups are live
• Terminal.tsx always resolves through the split-group path when layout/group state exists
• the temporary gate introduced in the dark-launch PR is removed instead of left behind as dead config