fix(desktop): un-clip hover action bar's upward bleed under content-visibility (#1354)

Signed-off-by: Wes <wesbillman@users.noreply.github.com>
Co-authored-by: Brain <21994759fc7a6fa6b965551d35cfd7897d262f2495467f2d78694ddcfa6a5c7e@sprout-oss.stage.blox.sqprod.co>

desktop/src/shared/styles/globals.css

@@ -2054,6 +2054,11 @@
     contain-intrinsic-size: auto 60px;
   }
 
+  /* paint containment clips the action bar's upward bleed; un-pause the active row */
+  .timeline-row-cv:is(:hover, :focus-within) {
+    content-visibility: visible;
+  }
+
   .content-visibility-auto-interactive {
     content-visibility: auto;
     contain-intrinsic-size: auto 200px;

desktop/tests/e2e/messaging.spec.ts

@@ -88,6 +88,15 @@ test("long autolink wraps without widening the timeline", async ({ page }) => {
       return barBox.x + barBox.width - (timelineBox.x + timelineBox.width);
     })
     .toBeLessThanOrEqual(0);
+  // #1338 guard: hovering must un-pause the row so the upward-bleeding bar renders
+  await expect
+    .poll(async () =>
+      actionBar.evaluate((bar) => {
+        const cvRow = bar.closest(".timeline-row-cv");
+        return cvRow ? getComputedStyle(cvRow).contentVisibility : "missing";
+      }),
+    )
+    .toBe("visible");
 });
 
 test("send multiple messages in sequence", async ({ page }) => {