Unfinished work on neoirc-cli hanging on keys and typed lines

Saved from a stopped session, not checked or reviewed.

Model: opus-5-5

internal/cli/app.go

@@ -616,15 +616,15 @@ func (a *App) cmdWindow(args string) {
 	nick := a.nick
 	a.mu.Unlock()
 
-	if bufIndex >= 0 && bufIndex < a.ui.BufferCount() {
-		buf := a.ui.buffers[bufIndex]
-		if buf.Name != "(status)" {
+	name, found := a.ui.BufferName(bufIndex)
+	if found {
+		if name != "(status)" {
 			a.mu.Lock()
-			a.target = buf.Name
+			a.target = name
 			a.mu.Unlock()
 
 			a.ui.SetStatus(
-				nick, buf.Name, "connected",
+				nick, name, "connected",
 			)
 		} else {
 			a.mu.Lock()