fix: settings window z-order on Hyprland and Linux app detach (#85)

src/main/runtime/settings-window-z-order.test.ts

@@ -0,0 +1,40 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { shouldSuppressVisibleOverlayRaiseForSeparateWindow } from './settings-window-z-order';
+
+test('separate settings windows suppress visible overlay restacking', () => {
+  const mainWindow = { id: 'overlay', isDestroyed: () => false };
+  const settingsWindow = { id: 'settings', isDestroyed: () => false };
+
+  assert.equal(
+    shouldSuppressVisibleOverlayRaiseForSeparateWindow({
+      window: mainWindow,
+      mainWindow,
+      separateWindows: [settingsWindow],
+    }),
+    true,
+  );
+});
+
+test('separate settings windows do not suppress unrelated or closed overlay work', () => {
+  const mainWindow = { id: 'overlay', isDestroyed: () => false };
+  const modalWindow = { id: 'modal', isDestroyed: () => false };
+  const closedSettingsWindow = { id: 'settings', isDestroyed: () => true };
+
+  assert.equal(
+    shouldSuppressVisibleOverlayRaiseForSeparateWindow({
+      window: modalWindow,
+      mainWindow,
+      separateWindows: [{ isDestroyed: () => false }],
+    }),
+    false,
+  );
+  assert.equal(
+    shouldSuppressVisibleOverlayRaiseForSeparateWindow({
+      window: mainWindow,
+      mainWindow,
+      separateWindows: [closedSettingsWindow, null],
+    }),
+    false,
+  );
+});