fix: stage sandbox media for inbound attachments

src/imessage/monitor.test.ts

@@ -14,9 +14,13 @@ let notificationHandler:
   | undefined;
 let closeResolve: (() => void) | undefined;
 
-vi.mock("../config/config.js", () => ({
-  loadConfig: () => config,
-}));
+vi.mock("../config/config.js", async (importOriginal) => {
+  const actual = await importOriginal<typeof import("../config/config.js")>();
+  return {
+    ...actual,
+    loadConfig: () => config,
+  };
+});
 
 vi.mock("../auto-reply/reply.js", () => ({
   getReplyFromConfig: (...args: unknown[]) => replyMock(...args),

src/imessage/send.test.ts

@@ -5,9 +5,13 @@ import { sendMessageIMessage } from "./send.js";
 const requestMock = vi.fn();
 const stopMock = vi.fn();
 
-vi.mock("../config/config.js", () => ({
-  loadConfig: () => ({}),
-}));
+vi.mock("../config/config.js", async (importOriginal) => {
+  const actual = await importOriginal<typeof import("../config/config.js")>();
+  return {
+    ...actual,
+    loadConfig: () => ({}),
+  };
+});
 
 vi.mock("./client.js", () => ({
   createIMessageRpcClient: vi.fn().mockResolvedValue({