[BUG] VSCode plan-review: comment panel overflows viewport with no internal scroll, hiding Submit/prompt (zoom-out is the only workaround)

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

What happens: In the VSCode extension plan-review flow, as inline comments accumulate (hit this at ~14 comments), the "Comments (N)" panel grows taller than the viewport. The panel has no internal scrollbar, and the Submit/Send control (and the main prompt input) get pushed off the bottom with no way to reach them. The plan pane only shows "Ready for review" / "Select text to add comments on the plan" - no action bar.

Things that did NOT work:

• Cmd+Enter (no-op)
• Cmd+A while focused in the panel selects the outer editor text, not the comment box
• The window was already at maximum height
• There is no collapse chevron on the comment thread
• No relevant Claude Code: command in the Command Palette

Only workaround found: View -> Zoom Out (Cmd+-) repeatedly shrinks the UI enough that the Submit button / prompt reappears below the comment list.

Expected: The comment panel should scroll internally (or the Submit action should be pinned / always-visible) so the review can be submitted regardless of comment count.

Environment: Claude Code VSCode native extension; macOS (Darwin 25.5.0). Reproduced multiple times.

What Should Happen?

The comment panel should scroll internally, or the Submit action should be pinned/always-visible, so a plan review can be submitted regardless of how many comments were added.

Error Messages/Logs

Steps to Reproduce

1. Enter plan mode in the VSCode extension; Claude presents a plan for review.
2. Select text and add many inline comments (~14).
3. Try to submit. Cmd+Enter does nothing; Cmd+A selects the outer editor, not the box; there's no collapse chevron and no relevant Claude Code: palette command; the window is already at max height.
4. The Submit control / prompt is off-screen below the comment list with no scroll. Only View → Zoom Out (Cmd+-) repeatedly shrinks the UI enough to reveal it.

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.167 (darwin-arm64)

Platform

Other

Operating System

macOS

Terminal/Shell

Other

Additional Information

From within VSCode plugin (not terminal)