feat(maps): draw every travel day's route at once, with the trip total

Extract the day route builder out of useRouteCalculation into a pure module and
aggregate it over the whole trip: one map with every day's route, each day in its
own colour, the mode per stage and the trip's total distance. Straight lines first,
roads as they answer; a refused leg keeps its line and adds no distance.

Give the floating map controls one shared drop shadow while adding the toggle, so
the new pill and the base-layer switcher stand off the tiles the way the locate
button always has. Document the control in wiki/Map-Features.md.

Addresses #1736

client/src/components/Planner/DayPlanSidebarRouteConnector.tsx

@@ -4,7 +4,7 @@ import type { RouteSegment } from '../../types'
 // Walking gets the foot icon; a plugin route profile ('plugin:…') gets the bolt —
 // its legs carry the profile-true durationText anyway, the icon just signals that
 // the time came from a plugin router (e.g. EV routing with charge time folded in).
-function profileIcon(profile: string) {
+export function profileIcon(profile: string) {
   if (profile === 'walking') return Footprints
   if (profile.startsWith('plugin:')) return Zap
   return Car