[chore] used codex to create a base layout for src

src/features/countdown/api.ts

@@ -0,0 +1,26 @@
+import { invokeCommand } from "../../shared/tauri/invoke";
+import type { CountdownCommand, CountdownSnapshotDto } from "./types";
+
+export async function fetchCountdownSnapshot(): Promise<CountdownSnapshotDto> {
+  return invokeCommand<CountdownSnapshotDto>("countdown_snapshot");
+}
+
+async function invokeCountdownCommand(command: CountdownCommand): Promise<void> {
+  await invokeCommand<void>(command);
+}
+
+export async function startCountdown(): Promise<void> {
+  await invokeCountdownCommand("countdown_start");
+}
+
+export async function pauseCountdown(): Promise<void> {
+  await invokeCountdownCommand("countdown_pause");
+}
+
+export async function resumeCountdown(): Promise<void> {
+  await invokeCountdownCommand("countdown_resume");
+}
+
+export async function resetCountdown(): Promise<void> {
+  await invokeCountdownCommand("countdown_reset");
+}