Move the inline repository management UI into a new RepositoryDashboard component
and wire it into the application. Refactor app state to compute a reactive
dashboardRepos list and update tab-closing logic so tabs can be closed while
preserving the management view when appropriate.
- Add a full dashboard with search, categories, workspaces and persisted prefs.
- Refactor close behavior to support keeping the management view open.
- Improve UI/CSS and accessibility for the management tab (compact layout and label).
