feat(core): add Electron runtime, services, and app composition

src/main/runtime/subtitle-position.ts

@@ -0,0 +1,22 @@
+import type { SubtitlePosition } from '../../types';
+
+export function createLoadSubtitlePositionHandler(deps: {
+  loadSubtitlePositionCore: () => SubtitlePosition | null;
+  setSubtitlePosition: (position: SubtitlePosition | null) => void;
+}) {
+  return (): SubtitlePosition | null => {
+    const position = deps.loadSubtitlePositionCore();
+    deps.setSubtitlePosition(position);
+    return position;
+  };
+}
+
+export function createSaveSubtitlePositionHandler(deps: {
+  saveSubtitlePositionCore: (position: SubtitlePosition) => void;
+  setSubtitlePosition: (position: SubtitlePosition) => void;
+}) {
+  return (position: SubtitlePosition): void => {
+    deps.setSubtitlePosition(position);
+    deps.saveSubtitlePositionCore(position);
+  };
+}