fix(notifications): reserve grid space for overlay thumbnail so it can't overlap text

The thumbnail was 100px wide but its grid column only reserved 56px, so on
macOS the image spilled ~44px into the content column and overlapped the
title/body. Reserve a minmax(0, 100px) track for the image and make the
image fluid (width: 100%; max-width: 100px; aspect-ratio) so it shrinks to
fit on narrow notifications instead of overlapping the text.

src/core/services/overlay-visibility.test.ts

@@ -154,6 +154,63 @@ test('macOS keeps visible overlay hidden while tracker is not ready and emits on
   assert.ok(!calls.includes('show'));
 });
 
+test('macOS dismisses overlay loading OSD when tracker recovers', () => {
+  const { window, calls } = createMainWindowRecorder();
+  let trackerWarning = false;
+  const osdMessages: string[] = [];
+  const dismissedOsds: string[] = [];
+  let tracking = false;
+  let geometry: WindowTrackerStub['getGeometry'] extends () => infer T ? T : never = null;
+  const tracker: WindowTrackerStub = {
+    isTracking: () => tracking,
+    getGeometry: () => geometry,
+    isTargetWindowFocused: () => tracking,
+  };
+
+  const run = () =>
+    updateVisibleOverlayVisibility({
+      visibleOverlayVisible: true,
+      mainWindow: window as never,
+      windowTracker: tracker as never,
+      trackerNotReadyWarningShown: trackerWarning,
+      setTrackerNotReadyWarningShown: (shown: boolean) => {
+        trackerWarning = shown;
+      },
+      updateVisibleOverlayBounds: () => {
+        calls.push('update-bounds');
+      },
+      ensureOverlayWindowLevel: () => {
+        calls.push('ensure-level');
+      },
+      syncPrimaryOverlayWindowLayer: () => {
+        calls.push('sync-layer');
+      },
+      enforceOverlayLayerOrder: () => {
+        calls.push('enforce-order');
+      },
+      syncOverlayShortcuts: () => {
+        calls.push('sync-shortcuts');
+      },
+      isMacOSPlatform: true,
+      showOverlayLoadingOsd: (message: string) => {
+        osdMessages.push(message);
+      },
+      dismissOverlayLoadingOsd: () => {
+        dismissedOsds.push('dismiss');
+      },
+    } as never);
+
+  run();
+  tracking = true;
+  geometry = { x: 0, y: 0, width: 1280, height: 720 };
+  run();
+
+  assert.deepEqual(osdMessages, ['Overlay loading...']);
+  assert.deepEqual(dismissedOsds, ['dismiss']);
+  assert.equal(trackerWarning, false);
+  assert.ok(calls.includes('show-inactive'));
+});
+
 test('tracked non-macOS overlay stays hidden while tracker is not ready', () => {
   const { window, calls } = createMainWindowRecorder();
   let trackerWarning = false;

src/renderer/overlay-notifications.test.ts

@@ -207,6 +207,15 @@ test('overlay notification cards use larger display dimensions', () => {
     overlayNotificationCss,
     /\.overlay-notification-card\.has-image\s*\{[^}]*min-height:\s*88px;/s,
   );
-  assert.match(overlayNotificationCss, /\.overlay-notification-image\s*\{[^}]*width:\s*100px;/s);
-  assert.match(overlayNotificationCss, /\.overlay-notification-image\s*\{[^}]*height:\s*56px;/s);
+  // The has-image card reserves a real grid track for the thumbnail so it
+  // cannot overlap the text, and the image shrinks to fit within that track.
+  assert.match(
+    overlayNotificationCss,
+    /\.overlay-notification-card\.has-image\s*\{[^}]*grid-template-columns:\s*minmax\(0,\s*100px\)\s+minmax\(0,\s*1fr\)\s+22px;/s,
+  );
+  assert.match(overlayNotificationCss, /\.overlay-notification-image\s*\{[^}]*max-width:\s*100px;/s);
+  assert.match(
+    overlayNotificationCss,
+    /\.overlay-notification-image\s*\{[^}]*aspect-ratio:\s*100 \/ 56;/s,
+  );
 });

src/renderer/style.css

@@ -259,14 +259,19 @@ body:focus-visible,
 }
 
 .overlay-notification-card.has-image {
-  grid-template-columns: 56px minmax(0, 1fr) 22px;
+  /* Reserve a real track for the thumbnail so it never overlaps the text.
+     minmax(0, 100px) lets the column shrink the image on narrow notifications
+     instead of letting it spill into the content column. */
+  grid-template-columns: minmax(0, 100px) minmax(0, 1fr) 22px;
   min-height: 88px;
   padding-left: 14px;
 }
 
 .overlay-notification-image {
-  width: 100px;
-  height: 56px;
+  width: 100%;
+  max-width: 100px;
+  aspect-ratio: 100 / 56;
+  height: auto;
   align-self: center;
   display: block;
   border-radius: 7px;