FEAT-1: add typed gerbils/lookups API + useApi/useMutation hooks

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

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

@@ -0,0 +1,24 @@
+/** Typed API functions for the Tiere (Rennmäuse) resource. */
+import { api, resources } from './client'
+import { toQueryString, type GridifyQuery } from './gridify'
+import type { CreateGerbil, Gerbil, Paged, UpdateGerbil } from './types'
+
+export function listGerbils(query: GridifyQuery): Promise<Paged<Gerbil>> {
+  return api.get<Paged<Gerbil>>(`${resources.gerbils}${toQueryString(query)}`)
+}
+
+export function getGerbil(id: string): Promise<Gerbil> {
+  return api.get<Gerbil>(`${resources.gerbils}/${id}`)
+}
+
+export function createGerbil(body: CreateGerbil): Promise<Gerbil> {
+  return api.post<Gerbil>(resources.gerbils, body)
+}
+
+export function updateGerbil(id: string, body: UpdateGerbil): Promise<Gerbil> {
+  return api.put<Gerbil>(`${resources.gerbils}/${id}`, body)
+}
+
+export function deleteGerbil(id: string): Promise<void> {
+  return api.delete(`${resources.gerbils}/${id}`)
+}