Add interactive release search (M6)

Release listing and grab in the shared arr client, a full-screen release
list (sort, hide rejected, rejection reasons, confirmation before grabbing
rejected releases; Usenet only), and a season/episode picker for Sonarr.
Overlays are now a stack so dialogs can open above the release list.
Add a fake Newznab indexer to the dev setup.

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

internal/ui/format.go

@@ -223,3 +223,11 @@ func arrStatusText(it arr.QueueItem) string {
 	}
 	return label
 }
+
+// movieTitleYear renders "Title (Year)".
+func movieTitleYear(m radarr.Movie) string {
+	if m.Year > 0 {
+		return fmt.Sprintf("%s (%d)", m.Title, m.Year)
+	}
+	return m.Title
+}