feat: mark pull requests approved by the authenticated user

src/main.rs

@@ -107,6 +107,7 @@ Local reviews: :diff.comment anchors exact Visual text, Visual Line rows, or the
       Snapshot anchors stay immutable; stale comments lose gutter markers; no publishing
 Pull requests: :pull_requests [REMOTE]; GitHub/GitLab/Gitea Open/Closed/Drafts/All tabs, type to search
       Enter opens the immutable PR head against its merge base; API auth uses provider tokens or gh/glab
+      ✓ before the PR number marks your API account's active approval; blank may mean unavailable
 Resolve jj conflicts: :resolve opens the current working-copy conflicts in a dedicated workspace
       Editable marker-free Draft vs readonly Alternative; :resolve.history shows inputs/base
       config.resolve_history_layout = \"columns\" (left/base/right) or \"base_below\" (left/right above base)