Legacy HTML/CSS pipeline (explicit opt-in only).

Default production is Image 2.0 FULL-GEN (see ../SKILL.md). Use these templates,
assets/base.css and scripts/build.py render|layout|check ONLY when the user
explicitly asks for editable HTML/SVG output.

templates/   finished HTML references (dense-mosaic / rich-medium / hero-poster / zoned-poster)
components.md  HTML snippet library
grid-recipes.md  12-column grid recipes for the templates
