Polish pass 2 — avatar hover, reply buttons, ellipses, a11y

- Unify NoteCard avatar hover between image and fallback variants
- Add aria-labels to compose toolbar buttons (emoji, attach, poll)
- Fix ThreadView inline reply button sizing to match compose post button
- Replace remaining '...' with unicode ellipsis across podcasts, v4v,
  thread, and ancestor chain components

src/components/v4v/V4VHistory.tsx

@@ -41,7 +41,7 @@ function HistoryRow({ entry }: { entry: V4VHistoryEntry }) {
               <div className="text-[9px] text-text-dim mb-1">Recipients:</div>
               {entry.recipients.map((r, i) => (
                 <div key={i} className="flex items-center justify-between text-[10px]">
-                  <span className="text-text-muted truncate">{r.name || r.address.slice(0, 16) + "..."}</span>
+                  <span className="text-text-muted truncate">{r.name || r.address.slice(0, 16) + "…"}</span>
                   <span className="text-text-dim shrink-0 ml-2">{r.sats} sats</span>
                 </div>
               ))}