refactor: extract mpv runtime command and osd helpers

src/core/services/mpv-runtime-service.ts

@@ -0,0 +1,49 @@
+export interface MpvRuntimeClientLike {
+  connected: boolean;
+  send: (payload: { command: (string | number)[] }) => void;
+  replayCurrentSubtitle?: () => void;
+  playNextSubtitle?: () => void;
+  setSubVisibility?: (visible: boolean) => void;
+}
+
+export function showMpvOsdRuntimeService(
+  mpvClient: MpvRuntimeClientLike | null,
+  text: string,
+  fallbackLog: (text: string) => void = console.log,
+): void {
+  if (mpvClient && mpvClient.connected) {
+    mpvClient.send({ command: ["show-text", text, "3000"] });
+    return;
+  }
+  fallbackLog(`OSD (MPV not connected): ${text}`);
+}
+
+export function replayCurrentSubtitleRuntimeService(
+  mpvClient: MpvRuntimeClientLike | null,
+): void {
+  if (!mpvClient?.replayCurrentSubtitle) return;
+  mpvClient.replayCurrentSubtitle();
+}
+
+export function playNextSubtitleRuntimeService(
+  mpvClient: MpvRuntimeClientLike | null,
+): void {
+  if (!mpvClient?.playNextSubtitle) return;
+  mpvClient.playNextSubtitle();
+}
+
+export function sendMpvCommandRuntimeService(
+  mpvClient: MpvRuntimeClientLike | null,
+  command: (string | number)[],
+): void {
+  if (!mpvClient) return;
+  mpvClient.send({ command });
+}
+
+export function setMpvSubVisibilityRuntimeService(
+  mpvClient: MpvRuntimeClientLike | null,
+  visible: boolean,
+): void {
+  if (!mpvClient?.setSubVisibility) return;
+  mpvClient.setSubVisibility(visible);
+}