Rewrite app/incidents/[id]/page.tsx to UI_REDESIGN.md §5.2. Header is now
type glyph + SeverityMark + active/resolved chip + a 27px title, with
elapsed time, path length (haversine sum over geocoded calls) and call
count as a single subline. Summary is promoted out of the old tab into a
first-class prose block (16.5px/1.58) — it's the artifact the product
sells, so it gets the best position instead of competing with Units/
Details behind a click. Units/Details tabs are gone; On scene / Cleared
render directly from units_active/units_cleared (chunk 3), Vehicles below.
New components/CallSpineEntry.tsx replaces CallRow for this page (CallRow
stays for the Archive table until chunk 12): time-ordered entries with a
numbered stop marker that matches the map's path stops via the same
sort-by-started_at-over-geocoded-calls index MapView's IncidentPathLayer
uses — the "shared index" from §2.4. Includes an inline play/scrub audio
player (lazy-fetches the signed URL on first play, same pattern CallRow
already used), transcript in sans prose instead of a font-mono <pre>, unit/
cleared-unit chips, and a paginating "N earlier calls" control. Thin/
status-only calls collapse to one line.
The incident map keeps the location_coords guard and now passes `calls`
through to MapView so its path polyline (chunk 5) renders here too.
Per UI_REDESIGN.md chunk 7.
