v0.15.0

• keep every comment one line in the pane, cursor included
• cap a comment author's name so its preview keeps room
• space comment authors' colours by the golden angle instead of a hash, so they never collide
• collapse comments only trail a spacer on their open card or a group's end, and indent under their header
• name comments_page's row count for what it counts, and check orphan status once
• document the comments pane's collapse, colours, and grouping
• group the comments pane by file, author, or status, and fold what is resolved
• colour each comment author, fixed hues for the human and the agent
• collapse comments-pane cards to one line, full card only under the cursor
• say what the as_human flag does without contrasting it
• reject an add_comment whose range or body do not hold up
• refuse to claim a walkthrough's own comments
• teach an agent to review a change with the dfr skill
• claim a comment as your own, one or the whole review
• let an agent write a comment, not only a reply

Full changelog: v0.14.1...v0.15.0