feat(labels): fetch and apply NIP-32 kind-1985 label events

- Add KIND_LABEL (kind 1985) constant to git_events.rs
- Add get_labels() merging inline t-tags with external kind-1985 events,
  gating each on author-or-maintainer permission
- Extend get_fetch_filters() to request kind-1985 events for all known
  issue and proposal IDs
- Track label event counts in FetchReport (field + Display + consolidation)
- Update issue_list.rs and list.rs to fetch label events from cache and
  pass them through get_labels() instead of reading t-tags inline

1 files changed, 3 insertions, 0 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 182fb6c..5a9fc51 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- NIP-32 label support: kind-1985 label events are now fetched alongside status events and merged with inline `t` tags to compute the effective label set for issues and PRs; only labels authored by the issue/PR author or a repository maintainer are applied; label counts appear in the fetch progress report
+- `ngit issue label <id> --label <L> [--label <L>...]` — apply one or more NIP-32 hashtag labels to an existing issue (author or maintainer only); publishes a kind-1985 event
+- `ngit pr label <id> --label <L> [--label <L>...]` — apply one or more NIP-32 hashtag labels to an existing PR (author or maintainer only); publishes a kind-1985 event
 - `ngit account whoami` — show the currently logged-in account(s)
 - `ngit pr` subcommand group: `list`, `view`, `checkout`, `apply`, `send`, `close`, `reopen`, `ready`, `comment`, `merge`; replaces the former top-level `ngit list`, `ngit checkout`, and `ngit apply` commands (hard-migrated); `ngit send` remains at the top level unchanged
 - `ngit pr view <id>` — view a PR with its full details and all comments (author, timestamp, body) in chronological order