refactor(main): extract remaining inline runtime logic from main

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

@@ -0,0 +1,37 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { composeOverlayVisibilityRuntime } from './overlay-visibility-runtime-composer';
+
+test('composeOverlayVisibilityRuntime returns overlay visibility handlers', () => {
+  const composed = composeOverlayVisibilityRuntime({
+    overlayVisibilityRuntime: {
+      updateVisibleOverlayVisibility: () => {},
+    },
+    restorePreviousSecondarySubVisibilityMainDeps: {
+      getMpvClient: () => null,
+    },
+    broadcastRuntimeOptionsChangedMainDeps: {
+      broadcastRuntimeOptionsChangedRuntime: () => {},
+      getRuntimeOptionsState: () => [],
+      broadcastToOverlayWindows: () => {},
+    },
+    sendToActiveOverlayWindowMainDeps: {
+      sendToActiveOverlayWindowRuntime: () => true,
+    },
+    setOverlayDebugVisualizationEnabledMainDeps: {
+      setOverlayDebugVisualizationEnabledRuntime: () => {},
+      getCurrentEnabled: () => false,
+      setCurrentEnabled: () => {},
+    },
+    openRuntimeOptionsPaletteMainDeps: {
+      openRuntimeOptionsPaletteRuntime: () => {},
+    },
+  });
+
+  assert.equal(typeof composed.updateVisibleOverlayVisibility, 'function');
+  assert.equal(typeof composed.restorePreviousSecondarySubVisibility, 'function');
+  assert.equal(typeof composed.broadcastRuntimeOptionsChanged, 'function');
+  assert.equal(typeof composed.sendToActiveOverlayWindow, 'function');
+  assert.equal(typeof composed.setOverlayDebugVisualizationEnabled, 'function');
+  assert.equal(typeof composed.openRuntimeOptionsPalette, 'function');
+});