fix(overlay): correct Hyprland fullscreen overlay alignment on Linux (#107)

src/main/runtime/overlay-window-layout.test.ts

@@ -99,6 +99,37 @@ test('live overlay bounds mismatch forces refresh after window manager restore d
   );
 });
 
+test('live overlay bounds mismatch compares content bounds when compositor adds insets', () => {
+  const geometry = { x: 0, y: 0, width: 3440, height: 1440 };
+
+  assert.equal(
+    hasLiveOverlayWindowBoundsMismatch(
+      [
+        {
+          isDestroyed: () => false,
+          getBounds: () => ({ ...geometry }),
+          getContentBounds: () => ({ x: 0, y: 14, width: 3440, height: 1426 }),
+        },
+      ],
+      geometry,
+    ),
+    true,
+  );
+  assert.equal(
+    hasLiveOverlayWindowBoundsMismatch(
+      [
+        {
+          isDestroyed: () => false,
+          getBounds: () => ({ x: 0, y: -14, width: 3440, height: 1454 }),
+          getContentBounds: () => ({ ...geometry }),
+        },
+      ],
+      geometry,
+    ),
+    false,
+  );
+});
+
 test('ensure overlay window level handler delegates to core', () => {
   const calls: string[] = [];
   const ensureLevel = createEnsureOverlayWindowLevelHandler({

src/main/runtime/overlay-window-layout.ts

@@ -3,12 +3,25 @@ import type { WindowGeometry } from '../../types';
 type OverlayBoundsWindow = {
   isDestroyed: () => boolean;
   getBounds: () => WindowGeometry;
+  getContentBounds?: () => WindowGeometry;
 };
 
 function sameGeometry(a: WindowGeometry | null | undefined, b: WindowGeometry): boolean {
   return a?.x === b.x && a.y === b.y && a.width === b.width && a.height === b.height;
 }
 
+function getWindowAlignmentBounds(window: OverlayBoundsWindow): WindowGeometry | null {
+  try {
+    return window.getContentBounds?.() ?? window.getBounds();
+  } catch {
+    try {
+      return window.getBounds();
+    } catch {
+      return null;
+    }
+  }
+}
+
 export function hasLiveOverlayWindowBoundsMismatch(
   windows: Array<OverlayBoundsWindow | null | undefined>,
   geometry: WindowGeometry,
@@ -17,7 +30,7 @@ export function hasLiveOverlayWindowBoundsMismatch(
     if (!window || window.isDestroyed()) {
       return false;
     }
-    return !sameGeometry(window.getBounds(), geometry);
+    return !sameGeometry(getWindowAlignmentBounds(window), geometry);
   });
 }