feat(hub): say "N groups unreachable" on Search for a few seconds, not for goodHEAD0.18main

The line sat above the results for as long as the page was open. It is now
said once a cross-group pass is over, for five seconds, in the same passing
note as "Link copied" — moved out of copy-link.js into note.js (`say(text,
ms)`), one note at a time for the whole page. The `.search-unreachable` rule
goes with the line it styled.

The copy-link probe now also checks in Chrome that the note goes by itself.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/packages/meshbay-hub/src/meshbay_hub/static/note.js b/packages/meshbay-hub/src/meshbay_hub/static/note.js
new file mode 100644
index 0000000..f55c307
--- /dev/null
+++ b/packages/meshbay-hub/src/meshbay_hub/static/note.js
@@ -0,0 +1,24 @@
+/**
+ * A line said once and gone, in the playlists' note (style.css
+ * `.playlist-note`): "Link copied", "2 groups unreachable". Not a dialog —
+ * nothing here is anyone's to dismiss.
+ *
+ * Appended to the body rather than rendered by a view, because the views that
+ * speak include modals and a context menu that has already closed. One note
+ * at a time: a second replaces the first and restarts the clock.
+ */
+
+let _note = null;
+let _timer = null;
+
+export function say(text, ms = 2500) {
+  if (!_note) {
+    _note = document.createElement('div');
+    _note.className = 'playlist-note page-note';
+    _note.setAttribute('role', 'status');
+  }
+  _note.textContent = text;
+  document.body.appendChild(_note);
+  clearTimeout(_timer);
+  _timer = setTimeout(() => { if (_note) _note.remove(); }, ms);
+}