Agent Manager: Review comment edit button doesn't work

[marius-kilocode]

Bug Description

When adding comments as part of a review in the Agent Manager, the edit button doesn't do anything. Users have to delete the comment and re-add it.

Root Cause

The editing signal is updated when the edit button is clicked, but the annotation rendering pipeline never re-triggers.

The click handler at webview-ui/agent-manager/review-annotations.ts:237 correctly calls setEditing(comment.id), but annotationsForFile in DiffPanel.tsx:244 only depends on commentsByFile() and draft() — it does not read editing(). Since the annotations array passed to <Diff> never changes, pierre (the diff rendering library) never re-renders the annotation, so the textarea never appears.

The same bug exists in FullScreenDiffView.tsx.

Steps to Reproduce

1. Open the Agent Manager and navigate to a session's diff review
2. Add a comment on a diff line
3. Click the edit button on the comment
4. Nothing happens — the comment stays in display mode

Expected Behavior

Clicking the edit button should switch the comment to edit mode (showing a textarea with the comment text).

Workaround

Delete the comment and add it again.

Fix Direction

Include the editing state in the annotations' reactive dependency chain so pierre detects the change and re-renders the annotation in edit mode.

Environment

Reported on remote SSH (Windows to Linux).

[okxint]

I'd like to work on this. The fix seems straightforward — adding the editing() signal as a dependency in the annotation computation so re-renders trigger correctly.

[marius-kilocode]

Hi @okxint, sorry saw your comment to late. Already pushed a fix.

[marius-kilocode]

@okxint nice fix, thanks for the contribution! I opted for #7637 because of the additional deduplication but included your cosmetic comparison change and linked it!