Resolve the remaining client type errors and the trip.title navbar bug

Drive the client typecheck to zero without any/ts-ignore: convert the tripId route param to a number once at the page boundary so it matches the numeric props and store actions it feeds, fix trip.name -> trip.title (the wire field is title, so the old read rendered blank in the files/offline views), and tighten the scattered handler-arity, DOM-cast and untyped-payload sites. No runtime behaviour change.

client/src/components/Admin/DefaultUserSettingsTab.tsx

@@ -130,7 +130,6 @@ export default function DefaultUserSettingsTab(): React.ReactElement {
     lng: 2.3522,
     address: null,
     category_id: null,
-    icon: null,
     price: null,
     currency: null,
     image_url: null,