fix(collections): white screen when editing a place (undefined in places) (#1081)

updatePlace wrote `res.place` into the places list, but the endpoint returns the
updated place directly (not wrapped in { place }, unlike savePlace) — so an
`undefined` slipped into the list and the category-filter's presentCategories()
crashed on `undefined.category_id`, blanking the whole page. The WS echo used to
mask it by refetching; excluding the editor's own socket exposed it.

- Read the updated place directly and guard against a falsy response.
- Fix the api return types to match (updatePlace/setStatus return the place).
- Harden filterPlaces / statusCounts / presentCategories / mappablePlaces against
  a stray undefined entry so a single bad row can never white-screen the page.

client/src/api/collections.ts

@@ -62,9 +62,9 @@ export const collectionsApi = {
     ax.post(`${base}/places`, body satisfies CollectionSavePlaceRequest).then((r: AxiosResponse) => r.data),
   saveFromTrip: (body: CollectionSaveFromTripRequest): Promise<CollectionSaveResult> =>
     ax.post(`${base}/places/from-trip`, body satisfies CollectionSaveFromTripRequest).then((r: AxiosResponse) => r.data),
-  updatePlace: (pid: number, body: CollectionPlaceUpdateRequest): Promise<{ place: CollectionPlace }> =>
+  updatePlace: (pid: number, body: CollectionPlaceUpdateRequest): Promise<CollectionPlace> =>
     ax.patch(`${base}/places/${pid}`, body satisfies CollectionPlaceUpdateRequest).then((r: AxiosResponse) => r.data),
-  setStatus: (pid: number, status: CollectionStatus): Promise<{ place: CollectionPlace }> =>
+  setStatus: (pid: number, status: CollectionStatus): Promise<CollectionPlace> =>
     ax.post(`${base}/places/${pid}/status`, { status }).then((r: AxiosResponse) => r.data),
   deletePlace: (pid: number): Promise<unknown> =>
     ax.delete(`${base}/places/${pid}`).then((r: AxiosResponse) => r.data),