Add a /dashboard/canvas page that renders every team server with its
resources and their running or queued deployments, backed by a new
ServerCanvasController::dashboard endpoint and a per-server usage
endpoint for zone headers. The dashboard remembers the list/canvas
choice and each section (projects, servers) its own table/grid view.
- Show Deploying/Queued pills on canvas cards and a foldable recent
deployments panel; add shared CanvasControls component
- Allow backup downloads from the server host via the S3 download
storage (PrepareFileDownloadJob accepts a null container)
- Extract backup toggle/run actions into ManagesDatabaseBackup and
surface them in backup execution headers; merge S3 and retention
sections into the general backup settings
- Move deployments indicator to the top bar and add a main nav
resource menu with submenus; simplify breadcrumbs and settings
layouts
- Add shared variables overview canvas and scheduled task modals
- Add feature tests for dashboard canvas, view modes, navbar
submenus, backup S3 downloads and scheduled task modals