Avoid querying terminal size on every TUI redraw (#36482)

## What changed

- Carry dimensions on resize events and reuse the cached screen size for ordinary draws.
- Refresh terminal geometry after resize settling, process resume, and external program execution.
- Pass the resolved size through transcript reflow, viewport updates, and standalone TUI screens so each frame uses consistent dimensions.

## Testing

- Cover cached draws, resize-driven rendering, settled-size rechecks, resume refreshes, and alternate-screen size updates.

GitOrigin-RevId: 9d83dbab50d7a038bd59b4c66c13abcac69ddc79

codex-rs/tui/src/app/input.rs

@@ -79,7 +79,8 @@ impl App {
         } else {
             self.chat_widget.set_raw_output_mode(enabled);
         }
-        if let Err(err) = self.reflow_transcript_now(tui) {
+        let terminal_width = tui.terminal.last_known_screen_size.into();
+        if let Err(err) = self.reflow_transcript_now(tui, terminal_width) {
             tracing::warn!(error = %err, "failed to reflow transcript after raw output mode toggle");
             self.chat_widget
                 .add_error_message(format!("Failed to redraw transcript: {err}"));