Feature 19 follow-up: Manage children screen (#222) (#223)

Co-authored-by: dev_agent <17+dev_agent@code.cubecraftcreations.com>
Co-committed-by: dev_agent <17+dev_agent@code.cubecraftcreations.com>

admin/src/api/children.ts

@@ -0,0 +1,50 @@
+/**
+ * Typed client for the admin child-profile write routes
+ * (/api/v1/admin/children). The list read is `fetchChildren` in ./definitions.
+ */
+import { apiFetch } from "./client";
+import { CHILDREN_PATH, readJson, type AdminChild } from "./definitions";
+
+export interface ChildCreateBody {
+  display_name: string;
+  colour?: string;
+  avatar_ref?: string;
+  sort_order?: number;
+}
+
+/**
+ * Omitted fields stay unchanged. The API rejects an explicit null, so a set
+ * colour or avatar cannot be cleared through this route.
+ */
+export type ChildEditBody = Partial<ChildCreateBody>;
+
+export const CHILDREN_REORDER_PATH = `${CHILDREN_PATH}/reorder`;
+
+function sendJson(path: string, method: "POST" | "PATCH", body: unknown): Promise<Response> {
+  return apiFetch(path, {
+    method,
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify(body),
+  });
+}
+
+export async function createChild(body: ChildCreateBody): Promise<AdminChild> {
+  return readJson<AdminChild>(await sendJson(CHILDREN_PATH, "POST", body));
+}
+
+export async function updateChild(id: number, body: ChildEditBody): Promise<AdminChild> {
+  return readJson<AdminChild>(await sendJson(`${CHILDREN_PATH}/${id}`, "PATCH", body));
+}
+
+export async function setChildActive(id: number, isActive: boolean): Promise<AdminChild> {
+  return readJson<AdminChild>(
+    await sendJson(`${CHILDREN_PATH}/${id}/active`, "PATCH", { is_active: isActive }),
+  );
+}
+
+/** `orderedIds` must be every child id in the household, in the new order. */
+export async function reorderChildren(orderedIds: number[]): Promise<void> {
+  await readJson<{ status: string }>(
+    await sendJson(CHILDREN_REORDER_PATH, "POST", { ordered_ids: orderedIds }),
+  );
+}