Drops 17 KB of embedded code templates that had drifted from actual
implementations in apps/app/src/ (auth store template still used
localStorage; portal router guards still showed dual-mode logic that
was consolidated to /portal/* routes within apps/app in PR-B1/B2a).
Slim rewrite: principles + file structure + pointers to actual
reference code in apps/app/src/. Globs narrowed to apps/app/**/*
since apps/portal/ no longer exists. Vuexy component selection
deferred to dev-docs/VUEXY_COMPONENTS.md as canonical registry.
Net: ~17 KB -> ~3 KB, less drift surface, points at living code
instead of duplicating it.
bert.hausmans
d82cf42728