Terminal renders garbled output when revisiting existing tabs

[waleedkadous]

Bug Description

When switching back to an existing terminal tab in the dashboard (e.g., clicking on a builder tab that's been running), the terminal displays garbled/chaff output — scattered characters, repeated "thinking" text, partial lines, and rendering artifacts.

This appears to happen when xterm.js reconnects to a tmux-backed terminal and replays the scrollback buffer.

Steps to Reproduce

1. Start Tower and activate a project
2. Open a builder terminal
3. Let it run for a while (generating output)
4. Switch to another tab (Dashboard or another terminal)
5. Switch back to the original terminal tab
6. Observe garbled rendering

Expected Behavior

Terminal should render cleanly when revisiting, showing the current state of the terminal without rendering artifacts.

Actual Behavior

Terminal shows scattered characters, repeated partial words (e.g., "thinking" appearing dozens of times), broken line formatting, and visual garbage throughout the scrollback area.

Environment

• macOS (Darwin 24.6.0)
• Codev v2.0.0-rc.58
• React dashboard with xterm.js + tmux-backed terminals via node-pty

[waleedkadous]

On it! Working on a fix now.

[waleedkadous]

Reopening — the scroll-to-bottom aspect of this bug is still present. After Tower restart, terminal replay starts printing from the top instead of showing the full buffer scrolled to bottom. Dragging the panel divider (triggering a resize/refit) fixes it, confirming the issue is that scrollToBottom() is not called after replay buffer flush.

[waleedkadous]

On it! Working on a fix now.