Pulls in the new gold-framed hex-pattern background assets for Resource
Distribution, Infrastructure Map, and Top Resources by Utilization,
replacing the plain card styling with the baked-in border/labels.
Also stages network-kpi-bg.png in public/ for the future Network page.
Moves the hero rendering to the layout level so the banner shows the
full golden arch and sky behind the page title, search bar, and
sub-tabs row. TopBar and the search input backgrounds are now
transparent so the banner reads through cleanly.
Wires up react-router-dom so the sidebar nav actually navigates between
pages, with route-aware active highlighting and dynamic page titles.
Extracts Glance content into its own page component and adds a new
Infrastructure page matching the mockup: status cards, resource
distribution/cost breakdown donuts, infra map, top resources by
utilization, resource trend chart, recent activity, and footer stats.
