standardize mobile api response parsing with shared helper

apps/mobile/src/api/helpers.ts

@@ -0,0 +1,14 @@
+import { ApiError, handleResponse } from "./responses";
+import { type ApiResponse } from "./types";
+
+export function parseApiData<T>(payload: unknown): T {
+  if (Array.isArray(payload)) {
+    return payload as T;
+  }
+
+  if (payload && typeof payload === "object" && "success" in payload) {
+    return handleResponse(payload as ApiResponse<T>);
+  }
+
+  throw new ApiError("Invalid response format");
+}