feat(builder): items 10+12+13 — scope canvas guides, Show Guides toggle, Layers panel hover/icons, topbar unification

Item 10: dashed canvas "guide" outlines were applied via blanket tag
selectors (div/section/header/...), so a finished section showed 3-4
nested dashed boxes. RenderNode.tsx (the <Editor onRender> override) now
tags each Craft.js droppable container's real DOM node with a
`data-craft-node` attribute (node.data.isCanvas, excluding ROOT), and
editor.css's guide rules target that attribute instead — a component's own
internal wrapper markup is no longer mistaken for a drop target. Added a
"Show guides" topbar toggle (default ON, persisted to localStorage),
state lifted in EditorShell.tsx (mirrors how `device` is already lifted),
flips `.guides-off` on Canvas.tsx's `.canvas-device-frame`.

Item 12: Layers panel rows get per-type FA icons (keyed off the same
craft.displayName used for the row label, seeded from BlocksPanel's
choices), indent-guide lines connecting nested rows, and row hover
highlights the matching canvas element (`data-layer-hovered`, written
directly to the node's DOM via `query.node(id).get().dom` — NOT via
`actions.setNodeEvent`, which is stripped from useEditor()'s public
`actions` at runtime, not just in its TS type, and threw when called).

Along the way, Craft.js's own connect() was found to already wire mouse
hover to the same `hovered` node event internally (previously invisible
because the matching CSS was dead) — RenderNode now also mirrors that
onto `data-craft-hovered` for a real-mouse-hover canvas highlight, and
both hover attributes plus the guide attribute are suppressed under
`.guides-off` so the toggle stays airtight.

Item 13: unified the topbar to one button radius (`.topbar-btn` 20px pill
-> var(--radius-md)), demoted Code/Preview to icon-only with
`data-tooltip`. Fixed a latent bug the new tooltips exposed: `[data-tooltip]`
tooltips render above their trigger, but the topbar has no room above it
(`body { overflow: hidden }`) — added a `.topbar` override to render
those below instead.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

craft/src/editor/RenderNode.tsx

@@ -14,14 +14,36 @@ interface RenderNodeProps {
  * straight through as a Fragment, so this never touches layout, never
  * appears in `toHtml` export (that walks the Craft node tree, not this
  * portal), and doesn't wrap every node in extra DOM.
+ *
+ * It also imperatively tags each node's real DOM element with two
+ * editor-only data attributes (never part of `toHtml` export, which walks
+ * the Craft node tree, not the live DOM):
+ *  - `data-craft-node`: set on actual Craft.js droppable containers
+ *    (`node.data.isCanvas`, excluding ROOT). `editor.css`'s dashed "guide"
+ *    outlines target this attribute instead of blanket tag selectors
+ *    (div/section/header/...), so a component's own internal wrapper markup
+ *    no longer picks up a guide outline it isn't a real drop target for.
+ *  - `data-craft-hovered`: mirrors `node.events.hovered` (Craft's hover
+ *    event set). Craft's own `connectors.connect()` (called by every
+ *    component) wires a native mouseover/mouseleave listener to this event
+ *    internally, so a plain mouse hover over any connected node sets it --
+ *    this attribute is a real-mouse-hover canvas highlight. (The Layers
+ *    panel's row-hover -> canvas-highlight sync, item 12, uses a sibling
+ *    `data-layer-hovered` attribute written directly by LayersPanel.tsx
+ *    instead of this event, since the action that would drive it here
+ *    -- `actions.setNodeEvent` -- is stripped from the public `useEditor()`
+ *    API at runtime.) editor.css matches both attributes for the same
+ *    outline and suppresses both under `.guides-off`.
  */
 export const RenderNode: React.FC<RenderNodeProps> = ({ render }) => {
   const { actions } = useEditor();
-  const { id, isSelected, dom, name, parent } = useNode((node) => ({
+  const { id, isSelected, dom, name, parent, isCanvas, isHovered } = useNode((node) => ({
     isSelected: node.events.selected,
+    isHovered: node.events.hovered,
     dom: node.dom,
     name: (node.data.props?.aiName as string) || node.data.displayName,
     parent: node.data.parent,
+    isCanvas: node.data.isCanvas,
   }));
 
   const badgeRef = useRef<HTMLDivElement>(null);
@@ -46,6 +68,24 @@ export const RenderNode: React.FC<RenderNodeProps> = ({ render }) => {
     };
   }, [active, updatePosition]);
 
+  useEffect(() => {
+    if (!dom) return;
+    if (isCanvas && id !== 'ROOT') {
+      dom.setAttribute('data-craft-node', '');
+    } else {
+      dom.removeAttribute('data-craft-node');
+    }
+  }, [dom, isCanvas, id]);
+
+  useEffect(() => {
+    if (!dom) return;
+    if (isHovered) {
+      dom.setAttribute('data-craft-hovered', '');
+    } else {
+      dom.removeAttribute('data-craft-hovered');
+    }
+  }, [dom, isHovered]);
+
   if (!active) return <>{render}</>;
 
   return (