TUI sidebar "Modified Files" section does not show session diffs

[seryakov-max]

Description

The sidebar's "Modified Files" section remains empty even after opencode modifies files during a session. Previously this worked correctly — the sidebar would show each changed file with the number of added and removed lines (e.g., +5 -2).
Files are confirmed to be modified on disk (git status shows the changes), but the TUI sidebar does not track or display them.
What I expect: After opencode edits a file, the sidebar should list the file under "Modified Files" with line change counts.
What actually happens: The "Modified Files" section never appears, even when multiple files are changed.

Plugins

Built-in plugins only

OpenCode version

1.17.7

Steps to reproduce

1. Open opencode in a git repository (opencode)
2. Ask opencode to modify a file (e.g., add a comment to README.md)
3. Observe that the sidebar "Modified Files" section stays empty
4. Verified files are actually modified on disk (git status shows changes)

Screenshot and/or share link

Operating System

Windows 10, Ubuntu WSL 2

Terminal

Windows Terminal

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• TUI: Modified files are no longer shown #17797: Same symptom — TUI "Modified Files" section no longer shown after previously working
• [Bug] v1.16.0: TUI sidebar "Modified Files" section completely hidden after path truncation fix #30877: Same section missing in TUI sidebar (reported as regression in v1.16.0 on WSL2/Windows)

If your issue is the same, please add a reaction or comment on the existing issue rather than opening a new one.