site-builder: dynamic CTAs, section anchors, edit-with-Sitesmith

Three related features:

1. Dynamic CTA buttons on HeroSimple, CTASection, CallToAction.
   New shared ctas[] array (text + href + variant + target) replaces the
   primary/secondary pair. Settings panel gets add/remove/reorder controls.
   Legacy fields stay readable for backwards compat — first user edit
   migrates the section onto the new array.

2. Anchor IDs on all layout/section components (Container, Section,
   BackgroundSection, ColumnLayout, plus 6 section blocks done by parallel
   subagent, plus Hero/CTA/CallToAction). Anchor input lives in the
   settings panel with an "auto from heading" button that walks the
   subtree for the first Heading.text. Renders as id="..." on the
   outermost element so #anchor URLs resolve.

3. Edit-with-Sitesmith targeted invocation. Right-click → "Ask Sitesmith"
   and a button at the top of the right-side settings panel both open the
   modal pre-targeted at the selected node. The node's serialized subtree
   is sent to the server; system prompt is augmented to require a patch
   with replace_node. Editor lifts modal state into a new SitesmithContext.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

craft/src/components/sections/FeaturesGrid.tsx

@@ -1,6 +1,7 @@
 import React, { CSSProperties } from 'react';
 import { useNode, UserComponent } from '@craftjs/core';
 import { cssPropsToString } from '../../utils/style-helpers';
+import { AnchorIdField } from '../../ui/AnchorIdField';
 
 interface FeatureItem {
   title: string;
@@ -11,6 +12,7 @@ interface FeatureItem {
 interface FeaturesGridProps {
   features?: FeatureItem[];
   style?: CSSProperties;
+  anchorId?: string;
 }
 
 const defaultFeatures: FeatureItem[] = [
@@ -22,6 +24,7 @@ const defaultFeatures: FeatureItem[] = [
 export const FeaturesGrid: UserComponent<FeaturesGridProps> = ({
   features = defaultFeatures,
   style = {},
+  anchorId,
 }) => {
   const {
     connectors: { connect, drag },
@@ -33,6 +36,7 @@ export const FeaturesGrid: UserComponent<FeaturesGridProps> = ({
   return (
     <section
       ref={(ref: HTMLElement | null): void => { if (ref) connect(drag(ref)); }}
+      id={anchorId || undefined}
       style={{
         padding: '80px 20px',
         backgroundColor: '#ffffff',
@@ -102,6 +106,7 @@ const FeaturesGridSettings: React.FC = () => {
 
   return (
     <div style={{ padding: '12px', display: 'flex', flexDirection: 'column', gap: '14px' }}>
+      <AnchorIdField />
       <div>
         <label style={{ fontSize: 11, color: '#a1a1aa', display: 'block', marginBottom: 6 }}>Background</label>
         <div style={{ display: 'flex', gap: 4, flexWrap: 'wrap' }}>
@@ -163,6 +168,7 @@ FeaturesGrid.craft = {
   props: {
     features: defaultFeatures,
     style: { backgroundColor: '#ffffff' },
+    anchorId: '',
   },
   rules: {
     canDrag: () => true,
@@ -177,11 +183,12 @@ FeaturesGrid.craft = {
 /* ---------- HTML export ---------- */
 
 (FeaturesGrid as any).toHtml = (props: FeaturesGridProps, _childrenHtml: string) => {
-  const esc = (s: any) => String(s ?? "").replace(/</g, '&lt;').replace(/>/g, '&gt;');
+  const esc = (s: any) => String(s ?? "").replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, '&quot;');
   const sectionStyle = cssPropsToString({
     padding: '80px 20px',
     ...props.style,
   });
+  const idAttr = props.anchorId ? ` id="${esc(props.anchorId)}"` : '';
   const cards = (props.features || defaultFeatures).map((feat) => {
     return `<div style="text-align:center;padding:32px 24px;border-radius:12px;background-color:#f8fafc;border:1px solid #e2e8f0">
       <div style="font-size:36px;margin-bottom:16px">${esc(feat.icon)}</div>
@@ -191,7 +198,7 @@ FeaturesGrid.craft = {
   }).join('\n    ');
 
   return {
-    html: `<section${sectionStyle ? ` style="${sectionStyle}"` : ''}>
+    html: `<section${idAttr}${sectionStyle ? ` style="${sectionStyle}"` : ''}>
   <div style="max-width:1100px;margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:32px">
     ${cards}
   </div>