Offline, a Mapbox map, another OpenFreeMap style or a raster template the device cannot serve now switches to the stored OpenFreeMap basemap, light or dark with the colour scheme, keeping every marker, route and track, with a small Offline map pill. It switches back once the connection returns. "Prepare for offline" stores that basemap's region for every trip, whatever the provider, and both styles' sprites and glyphs, including the scripts a trip in East or South Asia labels its places in. The vector prefetch keeps to OpenFreeMap's download rules (four requests at a time, 50 MB per run), raster tiles are no longer prefetched from OpenStreetMap's own servers, which their policy forbids, nor inside the iOS app, which has no service worker to serve them.
@trek/shared
Single source of truth for TREK's API contracts, expressed as Zod schemas and consumed by both the server (request validation + inferred DTO types) and the client (typed requests/responses).
This package is part of the incremental NestJS + React 19 migration (see the "Brownfield Rewrite" board). It is intentionally dormant until modules start importing it — adding it changes nothing for users.
Rules
- One folder per domain:
src/<domain>/<domain>.schema.ts(+.spec.ts). - Domain-agnostic building blocks live in
src/common/. - A route is only considered migrated once its contract lives here.
- Schemas are the source of truth; server DTOs and client types are inferred from them
(
z.infer<typeof schema>), never hand-duplicated.
Consumption (dev)
Both apps resolve @trek/shared to this package's TypeScript source:
- Server (
tsx): viapathsinserver/tsconfig.json. - Client (
vite): viaresolve.aliasinclient/vite.config.ts(+pathsfor the type-checker).
Production packaging (Docker / workspace wiring) is introduced in card F2, when the server first depends on this package at runtime. Until then prod builds are untouched.
Not yet here
The canonical error envelope is finalised in card F5 (it must match TREK's current Express error responses byte-for-byte), so it is deliberately not invented in F1.