Add responsive overflow handling and dedicated action menus for application,
service, database, and server headings, while improving upgrade and email
settings flows and returning 404s for missing deployment environments.
Introduce x-table toolbar/search/filter/sort/loading components and
multi-select deployment history filters with OR within groups and AND
across groups. Add live database/service status for breadcrumbs, shared
variables layout controls, logs viewer toolbar polish, and infrastructure
list filter consistency. Document patterns in UI_REDESIGN.md and cover
with feature tests.
This commit adds the functionality to navigate to the previous page in the deployment index. It includes changes to the `Index.php` and `index.blade.php` files.
