Apply the shared page-header pattern to configuration, access,
operations, retention, log, and changelog pages so the control panel
uses one consistent title, context, and action structure.
Add representative view assertions for the new page context on utility
pages.
Refs #28
Introduce a shared page-header pattern with kicker, title, subtitle, and
actions, then apply it to the dashboard, host detail, run detail, snapshot
detail, and retention plan pages.
Scope the global app header styles to avoid leaking sticky navigation styles
onto page-level headers, and add view assertions for the new page context.
Refs #28
Refresh the shared base styling so the Django control panel has a calmer,
more polished production-tool feel across all pages. Update typography,
navigation, panels, metrics, host cards, tables, forms, buttons, messages,
focus states, and responsive behavior through reusable CSS variables and
component styles.
Refs #28
