shadowdao b46b6915a5 fix(builder): validate AI response before deserializing into craft state
Adds an AI-boundary validation/sanitization pass in apply-ai-response.ts so
malformed or malicious Sitesmith output can never crash addNodeTree or
corrupt live craft state:

- resolvedName allowlist: any node whose type.resolvedName is not a
  registered component in componentResolver is dropped (with its subtree)
  and a console.warn is logged; buildNodeTree throws before touching
  Craft.js if the tree ROOT itself is invalid, which existing call sites
  already catch and warn on (fail soft, never throws into addNodeTree).
- update_props protected-key list (node_id) — an AI-supplied node_id can no
  longer overwrite the target node's real id; style is merged shallowly
  instead of replaced wholesale so unrelated existing style keys survive.
- id policy: regenerate, never skip. Any AI-supplied node id that is
  'ROOT', empty/non-string, or collides with an existing/already-used id is
  replaced with a fresh ai-auto-N id; the node itself is kept.

Extends apply-ai-response.test.ts with coverage for all of the above plus
regression tests proving fully-valid AI responses still apply exactly as
before.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-12 12:37:25 -07:00
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