All four 06_reference_app pages round-tripped U+2014 (em-dash) and U+2026
(ellipsis) through cp1252 during earlier PowerShell edits; restored the
characters and regenerated the wiki HTML + MCP modules.
- four pages walking the vet sample: overview, domain & API, pipelines &
worker, spec-driven client admin
- mkdocs nav section, index + start-an-app cross links
- bundle now exposes the walkthrough as wiki_reference_app_* modules
