dv v0.4.1

Added

• gf on a file:line in a comment (src/a.rs:12, a.rs:12-15, #L12) goes there: in the
  diff if it's shown, else in hx (Ctrl-o comes back). The skill has Claude cite code as
  path:line from the repo root, so it always resolves.

Fixed

• A comment on a range of lines (5-10) lights all of them beside its box in the comment
  margin, not just its last line; the cursor on any of them lights the box.