app.js was bundling Chart.js (~200 KB), Cytoscape (~500 KB) and four
heavy hooks (SensorChart, NetworkMap, WeathermapViewer, SitesMap)
into a single 1.25 MB blob that every page paid for.
Extract each into its own module under assets/js/hooks/ and reference
them through the existing lazyHook() wrapper so the implementation is
fetched only when a hook actually mounts. esbuild --splitting then
factors the shared cytoscape vendor blob into a chunk that's only
loaded on topology / weathermap pages.
After-bundle layout (minified):
app.js 297.8 KB (was ~1250 KB; -76%)
chunk-LJGWK7RH (cyto) 555.1 KB loaded on topology pages only
sensor_chart 325.3 KB loaded on sensor pages only
network_map 24.4 KB topology hook glue
weathermap 13.0 KB weathermap hook glue
sites_map 4.1 KB site map hook glue
coverage_hooks 25.0 KB coverage hook glue
LeafletMap also moved to sites_map.ts and now uses ensureLeaflet
instead of polling for window.L with setTimeout.
