feat(editor): hierarchical function-tree Items browse (#345)

* feat(editor): hierarchical function-tree Items browse

Add an optional DB-driven taxonomy browse to the Items panel. When the
embedder supplies a `functionTree`, the panel renders roots as category
tabs and child tags as a secondary chip row, filtering items by the
selected node and any descendant slug; otherwise it falls back to the
legacy hardcoded category path untouched.

Adds `AssetInput.functionTags` so items can carry their function-axis
tag slugs, and exports `FunctionTreeNode` for embedders to type the tree.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* chore(editor): sync bun.lock (@pascal-app/mcp 0.3.0)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

packages/core/src/schema/nodes/item.ts

@@ -99,6 +99,10 @@ const assetSchema = z.object({
   dimensions: z.tuple([z.number(), z.number(), z.number()]).default([1, 1, 1]), // [w, h, d]
   attachTo: z.enum(['wall', 'wall-side', 'ceiling']).optional(),
   tags: z.array(z.string()).optional(),
+  // Function-axis tag slugs from the taxonomy. Drives the hierarchical
+  // Items-tab browse: a tree node matches when any of its descendant slugs
+  // appears here. Absent for the seeded built-in catalog.
+  functionTags: z.array(z.string()).optional(),
   // These are "Corrective" transforms to normalize the GLB
   offset: z.tuple([z.number(), z.number(), z.number()]).default([0, 0, 0]),
   rotation: z.tuple([z.number(), z.number(), z.number()]).default([0, 0, 0]),