* ci(playwright): shard app e2e in CI
Run the app Playwright suite across isolated CI shards and keep restarted E2E daemons on the same speech-disabled setup path as global setup.
* test(app): share disabled speech e2e env
Multiple workspaces can share one checkout directory. Agent and terminal
status, sidebar tabs, and ownership now attribute strictly by workspace ID,
so a running or blocked agent in one workspace no longer shows up on its
same-directory siblings.
A one-time startup migration backfills workspace IDs onto legacy agents, and
every agent and terminal is created with one thereafter. Directory lookups
remain only for genuinely folder-derived git facts (branch, diff) and the
archive-by-path adapter.
