* feat(stack-view): identity header with health state and action hierarchy
Redesign the stack view header around three questions: what is this, is it
healthy, what does it do. Surface Docker healthcheck state, primary image
tag, and image digest; group actions by frequency.
- Backend: extend /api/stacks/:name/containers with healthStatus (healthy /
unhealthy / starting / none), Image, and ImageID by inspecting each
container in parallel.
- Frontend: replace flat CardHeader with breadcrumb, italic serif title,
colored state pill with pulse, and a mono image/digest line with a
one-click copy button for the full digest.
- Frontend: action hierarchy - primary cyan Restart/Start, outline Stop and
Update, and an overflow menu for Rollback, Scan config, and Delete.
- Docs: new Stack header section and updated controlling-a-running-stack
tables showing primary/secondary/overflow grouping.
* test(e2e): open overflow menu to reach stack Delete action
Destructive actions now live under the stack toolbar overflow menu rather
than as a flat top-level button, so the delete flow must click More actions
before selecting the Delete menu item.
Anso