applyRuntimeInfo unconditionally mirrored a runtime's cwd, branch, model
and usage into the global composer atoms. Every tile create and session
branch called it, so opening a session in another worktree re-pointed the
MAIN pane's coding rail at that tile's repo — and persisted it, so the
wrong workspace cwd survived a restart.
Collect the patch first, then mirror it once behind a `foreground` gate.
Background callers still get the full patch for their own session state;
they just stop publishing into state they don't own.
Brooklyn Nicholson
dd762d07bb