POST /sessions no longer silently drops `workspace`. ThtRunner.run/json
take an optional workspace; configArg() selects workspaces/<ws>.yaml when
it exists under harnessDir, else falls back to default configPath.
sessionNew threads workspace through. Route forwards b.workspace with an
MVP note (gate/Pi side still single-workspace via symlinked config/tht.yaml).
19/19 tests pass, tsc clean.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Make buildApp injectable (deps.thtRunner + deps.spawnFn); create
src/routes/sessions.ts with all 7 session routes under authPreHandler;
wire bridge.onClientEvent→hub.publish before returning {id} from POST
/sessions; SSE subscribes with pendingWidget safety net.
18/18 tests pass, tsc clean.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
marcopanandClaude Sonnet 4.6