Fix styled switch-back repaint

internal/app/child.go

@@ -379,9 +379,10 @@ func (c *Child) signal(sig syscall.Signal) error {
 // ratatui/ink TUIs re-render coherently against the snapshot we just
 // replayed. We toggle the PTY size by one row so the kernel reliably
 // emits SIGWINCH (TIOCSWINSZ skips the signal if the size didn't
-// change). The emulator is left alone — it already matches our intended
-// size and the brief mismatch only affects what the child writes during
-// the second redraw.
+// change), then send SIGWINCH explicitly for TUIs that miss or coalesce
+// the size-toggled signal. The emulator is left alone — it already
+// matches our intended size and the brief mismatch only affects what the
+// child writes during the second redraw.
 func (c *Child) NudgeRedraw(cols, rows uint16) {
 	pty := c.PTY()
 	if pty == nil || rows < 2 {
@@ -389,6 +390,7 @@ func (c *Child) NudgeRedraw(cols, rows uint16) {
 	}
 	_ = pty.Resize(cols, rows-1)
 	_ = pty.Resize(cols, rows)
+	_ = c.signal(syscall.SIGWINCH)
 }
 
 func (c *Child) markExited(err error) {