Adopt the technical-light design system across the Admin web UI:
- Vendor theme.css + IBM Plex woff2 fonts into wwwroot; include
theme.css globally after Bootstrap.
- Rebuild MainLayout: top app-bar (brand mark, breadcrumb, connection
pill) + hairline-ruled side rail with accent-bordered active link.
- Convert all 33 pages to the component catalog — tables to
panel + data-table (num/mono columns), KPI cards to agg-grid,
detail blocks to metric-card/kv rows, badges to chips, alerts to
panel notice, headings to page-title/panel-head, .rise reveals.
- Buttons/forms stay on Bootstrap; theme.css restyles them via
--bs-* overrides. View-specific layout lives in app.css; all
colour/type comes from theme.css tokens.
Also fix a pre-existing /fleet 500: the node-state query ordered on
a property of a constructed FleetNodeRow record, which EF Core
cannot translate. Order the join's columns before projecting.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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