Sidebar and AdminSidebar were re-instantiated on every page navigation
(17 pages total), causing unnecessary DOM teardown/rebuild and redundant
localStorage reads. Now each lives in its respective +layout.svelte as a
single persistent instance.
Also adds onDestroy cleanup for leaked timers (settings, team, login RAF
loop) and CSS containment on <main> to isolate layout recalculations.
- Admin list: remove redundant Open button, normalize with dashboard
patterns (sorting, search highlight, auto-refresh, animations)
- Admin detail: breadcrumb header, status bar, visibility polling
- FilesTab: add treeOnly prop, compact mode uses 2/7 tree + 5/7 preview
split, expand tree to full width when no file selected, improve copy
- MetricsPanel: hide Live badge in compact layout (redundant with status)
- DestroyDialog: accept destroyFn prop for admin capsule deletion
Moves all Chart.js metrics logic (polling, smoothing, chart init/update)
into a reusable MetricsPanel component with 'full' and 'compact' layout
modes. The admin capsule detail page now reuses MetricsPanel, TerminalTab,
and FilesTab — no duplicated code.
