Overhaul the Tickets tab into the documented INC operations dashboard,
backed by the new GET /webhook/inc-dashboard endpoint (reporting.fn_inc_dashboard):
- Filterbar (cluster / status / window: today|week|month|custom)
- Metric strip: open now, closed in window, open/closed SLA breakdown,
avg MTTR, closures/day + freshness
- Live map: open INC coloured by SLA state, dimmed closed overlay,
FleetNow vehicle markers, layer toggles + SLA legend
- By-status / by-cluster tables + daily closures chart
- Data load decoupled from the basemap so the dashboard renders even if
WebGL/map init is slow or fails
Removes the old combined INC/CRQ map and the /webhook/tickets call (CRQ deferred).
Adds docs/tickets-inc-{overhaul-plan,implementation-guide}.{md,html}.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
