# SPEC: Replace Prompt Dialog with Inline Comment Textarea

## Overview

The review approval flow uses `prompt()` for comments, which is a jarring browser popup. Replace it with a textarea in the detail modal. After submission, close the modal and return to the board.

## Changes

### dashboard.js
- Add comment `<textarea>` in the detail panel review section
- `submitReview()` reads from textarea instead of `prompt()`
- On success, close the modal (`closeDetail()`) instead of re-rendering it

### index.html
- No structural changes needed (textarea is rendered by JS in the detail panel)

### styles.css
- Add styles for the comment textarea

## Acceptance Criteria
- [ ] Review section shows a textarea for optional comment
- [ ] Clicking Approve/Request Changes submits with textarea content
- [ ] Modal closes after successful submission
- [ ] No browser `prompt()` popup

## Notes
- Textarea is always visible in the review section
- Comment is optional (can be empty)