v0.3.1

Fixes three defects in 0.3.0. No capability changes, so Kandev does not ask for
re-approval.

• Pausing or resuming an issue watch no longer erases it. The pause toggle
  sends only the new enabled state, but the update path overwrote the agent and
  executor profiles, prompt, repository, base branch, query, labels and the
  start-agent setting with empty values. An update now changes only the fields it
  carries, and a field can still be cleared by sending it empty on purpose.
  A watch that was paused or resumed on 0.3.0 has already lost those settings
  and they cannot be recovered; open it and set them again.
• The review panel could not render. The adapter handed Kandev's detail view
  a different shape from the one it renders, and the view throws on the first
  field it expects and does not find (the author, the reviewer list). The adapter
  now supplies every field. What the review snapshot does not carry is shown as
  a neutral placeholder rather than invented: the author reads "unknown", the
  branches are blank, the line counts are 0, and the reviewer and comment lists
  are empty. Loading the real values needs a detail request the panel does not
  make yet. State, draft, checks, review state and pending reviewers are real.
• Issue watches could miss issues on older instances. The watch walks a
  repository's issues a page at a time and stopped at the first page that looked
  short. A server that ignores the issue-only filter (older Gitea) mixes pull
  requests into the page, so a full page of mostly pull requests looked short and
  every issue after it was dropped. The walk now judges a page by the rows the
  server sent.

Full Changelog: v0.3.0...v0.3.1