Dedicated view surfacing all templates with blockers (migration will fail)
and warnings (migration with caveats). Each blocker item shows all error
messages; each warning item has a Migrate Anyway button and View Detail link.
Nav badge count driven by state.issueCount (updated when templates load).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Paul Huliganga