refactor: compose startup and setup window wiring

src/main/runtime/composers/overlay-window-composer.test.ts

@@ -0,0 +1,34 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { composeOverlayWindowHandlers } from './overlay-window-composer';
+
+test('composeOverlayWindowHandlers returns overlay window handlers', () => {
+  let mainWindow: { kind: string } | null = null;
+  let modalWindow: { kind: string } | null = null;
+
+  const handlers = composeOverlayWindowHandlers<{ kind: string }>({
+    createOverlayWindowDeps: {
+      createOverlayWindowCore: (kind) => ({ kind }),
+      isDev: false,
+      ensureOverlayWindowLevel: () => {},
+      onRuntimeOptionsChanged: () => {},
+      setOverlayDebugVisualizationEnabled: () => {},
+      isOverlayVisible: (kind) => kind === 'visible',
+      tryHandleOverlayShortcutLocalFallback: () => false,
+      forwardTabToMpv: () => {},
+      onWindowClosed: () => {},
+      getYomitanSession: () => null,
+    },
+    setMainWindow: (window) => {
+      mainWindow = window;
+    },
+    setModalWindow: (window) => {
+      modalWindow = window;
+    },
+  });
+
+  assert.deepEqual(handlers.createMainWindow(), { kind: 'visible' });
+  assert.deepEqual(mainWindow, { kind: 'visible' });
+  assert.deepEqual(handlers.createModalWindow(), { kind: 'modal' });
+  assert.deepEqual(modalWindow, { kind: 'modal' });
+});