OrganonTweaks/Template/board/task_comment_icon.php

<?php /*
 * Rendered by the template:board:task:icons hook, inside the card icons row. When a card
 * has no comments yet, Kanboard shows no comment icon at all -- so adding the first comment
 * means opening the card and finding the sidebar link. This adds a comment bubble with a
 * "+" that opens the same comment modal (CommentListController::show) the native count icon
 * uses, so the first comment can be added straight from the board. Cards that already have
 * comments render nothing here (the native count icon already shows).
 *
 * Only shown to users who may create a comment (CommentController::save is PROJECT_MEMBER),
 * so it does not appear for read-only viewers.
 */ ?>
<?php if (empty($task['nb_comments']) && $this->user->hasProjectAccess('CommentController', 'save', $task['project_id'])): ?>
    <?php /* The hook renders at the END of the icons row; relocate.js moves this span up to
             the native comment slot (before the description icon) so the order matches. */ ?>
    <span class="organontweaks-comment-add">
        <?= $this->modal->medium('comments-o', '+', 'CommentListController', 'show', array('task_id' => $task['id']), t('Add a comment')) ?>
    </span>
<?php endif ?>