[BUG] Changes panel does not update when files are modified externally in desktop

[felipebrgs1]

Bug Description

When a file is modified manually (via VSCode or another editor outside of OpenCode), the "Changes" panel in the desktop app does not update automatically. The user has to perform an action in the app (like moving the cursor or switching sessions) to see the changes.

Root Cause

The file watcher system uses SSE events to notify the frontend when a file changes (file.watcher.updated → refreshVcs() ). However, in the desktop app, these SSE events may not arrive reliably, causing the Changes panel to become stale.

Expected Behavior

The Changes panel should automatically refresh within a few seconds when a file is modified externally.

Environment

• OpenCode Desktop app (electron)
• File watcher enabled

[github-actions]

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

• [BUG] Desktop app file tree does not update with git changes (file watcher not refreshing) #19182: Desktop app file tree does not update with git changes (file watcher not refreshing) — same symptom of stale UI when files are modified externally
• opencode ide: file not get updated after editing outside opencode ide #7583: File not updated after editing outside opencode IDE — same core problem of external edits not being reflected in the app

Please review those issues and consider adding a comment there instead if they cover the same problem.