FEAT-3: litter type+CRUD, Zucht strings, /wuerfe nested routes (retire LittersPage)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

gerbil-manager-web/src/api/litters.ts

@@ -1,7 +1,24 @@
 /** Typed API functions for the Würfe (litters) resource. */
 import { api, resources } from './client'
-import type { Litter } from './types'
+import { toQueryString, type GridifyQuery } from './gridify'
+import type { CreateLitter, Litter, Paged, UpdateLitter } from './types'
 
 export function getLitter(id: string): Promise<Litter> {
   return api.get<Litter>(`${resources.litters}/${id}`)
 }
+
+export function listLitters(query: GridifyQuery): Promise<Paged<Litter>> {
+  return api.get<Paged<Litter>>(`${resources.litters}${toQueryString(query)}`)
+}
+
+export function createLitter(body: CreateLitter): Promise<Litter> {
+  return api.post<Litter>(resources.litters, body)
+}
+
+export function updateLitter(id: string, body: UpdateLitter): Promise<Litter> {
+  return api.put<Litter>(`${resources.litters}/${id}`, body)
+}
+
+export function deleteLitter(id: string): Promise<void> {
+  return api.delete(`${resources.litters}/${id}`)
+}