feat(transport): add bus, taxi, bicycle, ferry and other transport types (#1105)

Closes #718. Adds five new transport reservation types alongside the
existing flight/train/car/cruise: bus, taxi, bicycle, ferry and a generic
'transport_other' catch-all. The new types are treated as first-class
transports everywhere — the transport modal, day plan, route calculation,
map overlays, file grouping and the PDF export — and are translated across
all 20 locales.

A dedicated 'transport_other' value is used for the catch-all so existing
'other' bookings are not reclassified as transport.

client/src/hooks/useRouteCalculation.ts

@@ -4,7 +4,7 @@ import { calculateRouteWithLegs } from '../components/Map/RouteCalculator'
 import type { TripStoreState } from '../store/tripStore'
 import type { RouteSegment, RouteResult } from '../types'
 
-const TRANSPORT_TYPES = ['flight', 'train', 'bus', 'car', 'cruise']
+const TRANSPORT_TYPES = ['flight', 'train', 'bus', 'car', 'taxi', 'bicycle', 'cruise', 'ferry', 'transport_other']
 
 /**
  * Manages route calculation state for a selected day. Extracts geo-coded waypoints from