fix(tui): clear resize repaint artifacts

codex-rs/tui/src/insert_history.rs

@@ -135,7 +135,9 @@ where
         let line_wrapped = match wrap_policy {
             HistoryLineWrapPolicy::Terminal => vec![line.clone()],
             HistoryLineWrapPolicy::PreWrap
-                if line_contains_url_like(line) && !line_has_mixed_url_and_non_url_tokens(line) =>
+                if is_preformatted_box_table_line(line)
+                    || (line_contains_url_like(line)
+                        && !line_has_mixed_url_and_non_url_tokens(line)) =>
             {
                 vec![line.clone()]
             }
@@ -246,6 +248,19 @@ where
     Ok(())
 }
 
+fn is_preformatted_box_table_line(line: &Line<'_>) -> bool {
+    let text: String = line
+        .spans
+        .iter()
+        .map(|span| span.content.as_ref())
+        .collect();
+    let trimmed = text.trim_start();
+    (trimmed.starts_with('│') && trimmed.matches('│').count() >= 2)
+        || trimmed.starts_with('┌')
+        || trimmed.starts_with('├')
+        || trimmed.starts_with('└')
+}
+
 /// Render a single wrapped history line: clear continuation rows for wide lines,
 /// set foreground/background colors, and write styled spans. Caller is responsible
 /// for cursor positioning and any leading `\r\n`.
@@ -442,6 +457,22 @@ mod tests {
     use ratatui::layout::Rect;
     use ratatui::style::Color;
 
+    #[test]
+    fn detects_preformatted_box_table_lines() {
+        assert!(is_preformatted_box_table_line(&Line::from(
+            "│       Link │ a (https://example.com/a) │"
+        )));
+        assert!(is_preformatted_box_table_line(&Line::from(
+            "┌──────┬────────┐"
+        )));
+        assert!(!is_preformatted_box_table_line(&Line::from(
+            "plain text with https://example.com"
+        )));
+        assert!(!is_preformatted_box_table_line(&Line::from(
+            "  │ quoted text with https://example.com"
+        )));
+    }
+
     #[test]
     fn writes_bold_then_regular_spans() {
         use ratatui::style::Stylize;

codex-rs/tui/src/tui.rs

@@ -770,7 +770,16 @@ impl Tui {
         }
 
         if area != terminal.viewport_area {
-            let clear_position = Position::new(/*x*/ 0, previous_area.y.min(area.y));
+            let terminal_resized = size != terminal.last_known_screen_size;
+            // Terminal emulators can natively reflow visible scrollback before Codex gets the
+            // resize event. When that happens, ratatui's diff buffer has no record of the glyphs
+            // now sitting under blank cells, so repaint from a fully-cleared visible screen.
+            let clear_y = if terminal_resized {
+                0
+            } else {
+                previous_area.y.min(area.y)
+            };
+            let clear_position = Position::new(/*x*/ 0, clear_y);
             terminal.set_viewport_area(area);
             terminal.clear_after_position(clear_position)?;
             needs_full_repaint = true;