docs: add deploy and staging smoke runbook

TASKS.md

@@ -2,19 +2,18 @@
 
 ## Current
 
-### `feat/post-regression-fixes`
+### `feat/deploy-and-staging-smoke`
 
 Status: completed
 
 DoD:
-- misleading non-functional UI actions are clearly marked or disabled
-- login page no longer suggests working password-reset/SSO/request-access flows
-- settings planned capabilities look explicitly read-only and non-interactive
-- node checks, UI docker build, affected Playwright specs and workspace check pass
+- deploy/staging smoke checklist exists
+- checklist covers server health, proxy routing, auth, UI pages, secrets, MCP, streaming
+- deployment, demo and README docs link to the same smoke runbook
 
 ## Next
 
-- `feat/deploy-and-staging-smoke`
+- `feat/staging-regression-notes`
 
 ## Backlog