Tailwind playbooks

Historical step playbooks for the Bulma → Tailwind CSS platform migration (umbrella #52). Program status and locked decisions live in the roadmap.

Step	Playbook
53	Toolchain
54	Shared helpers
55	Shell + auth
56	User surfaces
57	Admin asset CRUD
58	Admin spatial
59	Admin eink + sensors
60	Admin tools
61	Admin remaining
62	Drop Bulma + preflight