Register all seven Wave 1 block types with their server-side validation
schemas, self-registering via server/src/blocks/types/*:
heading, rich_text, image, two_column (container), cta, divider, quote.
- propHelpers.js: shared validators (isSafeUrl rejects javascript:/data:/
protocol-relative, enum/required/optional text, strict key allowlist).
- rich_text carries a `sanitize` normalizer (registry now supports it) that
runs html through the shared cleanBody allowlist on save.
- Registry entrypoint requires the type modules so all schemas load.
Verified: all 7 register; valid blocks pass; malformed props yield precise
per-path errors; one-level nesting cap enforced; rich_text sanitize strips
script/onerror.
Client renderers + editors (step 3 client half) still to come.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude
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