Implements the remaining issue management subcommands with full lifecycle support: - view: displays issue details including state (open/closed), author, creation date, body; supports numeric (#1) and rkey identifiers - edit: updates title and/or body via --title/-t, --body/-b, --body-file/-F - close/reopen: toggle issue state; idempotent by design - delete: permanently removes an issue; requires confirmation unless --force is passed; cancel path uses process.exit(0) outside try/catch to correctly propagate clean exit Also: - resolveIssueUri helper: on-demand numeric resolution by sorting issues by createdAt (oldest = #1), no persistent cache needed - list command updated to show numbered issues with state badges - formatIssueState added to src/utils/formatting.ts - All existing list tests updated for new output format; new test suites added for all five commands covering auth, context, numeric/rkey resolution, option validation, and confirmation flow Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>