Fix copy: build fig-kiwi binary synchronously in copy event handler

navigator.clipboard.write() inside .then() loses user gesture context
and gets blocked by the browser. The schema is prefetched on app init
and cached, so encoding is done synchronously in clipboardData.setData
within the native copy event.

src/engine/clipboard.ts

@@ -55,10 +55,17 @@ let cachedSchema: CompiledSchema | null = null
 let cachedSchemaDeflated: Uint8Array | null = null
 
 export function prefetchFigmaSchema(): void {
-  getFigmaSchema()
+  getFigmaSchemaAsync()
 }
 
-async function getFigmaSchema(): Promise<{ compiled: CompiledSchema; deflated: Uint8Array }> {
+function getFigmaSchemaSync(): { compiled: CompiledSchema; deflated: Uint8Array } | null {
+  if (cachedSchema && cachedSchemaDeflated) {
+    return { compiled: cachedSchema, deflated: cachedSchemaDeflated }
+  }
+  return null
+}
+
+async function getFigmaSchemaAsync(): Promise<{ compiled: CompiledSchema; deflated: Uint8Array }> {
   if (cachedSchema && cachedSchemaDeflated) {
     return { compiled: cachedSchema, deflated: cachedSchemaDeflated }
   }
@@ -474,11 +481,13 @@ function sceneNodeToKiwi(
   return result
 }
 
-export async function buildFigmaClipboardHTML(
+export function buildFigmaClipboardHTML(
   nodes: SceneNode[],
   graph: SceneGraph
-): Promise<string> {
-  const { compiled, deflated: schemaDeflated } = await getFigmaSchema()
+): string | null {
+  const schema = getFigmaSchemaSync()
+  if (!schema) return null
+  const { compiled, deflated: schemaDeflated } = schema
 
   const docGuid = { sessionID: 0, localID: 0 }
   const canvasGuid = { sessionID: 0, localID: 1 }

src/stores/editor.ts

@@ -239,19 +239,11 @@ export function createEditorStore() {
 
     const names = nodes.map((n) => n.name).join('\n')
     const internalHtml = buildOpenPencilClipboardHTML(nodes, graph)
+    const figmaHtml = buildFigmaClipboardHTML(nodes, graph)
 
+    const html = figmaHtml ? figmaHtml + internalHtml : internalHtml
+    clipboardData.setData('text/html', html)
     clipboardData.setData('text/plain', names)
-    clipboardData.setData('text/html', internalHtml)
-
-    buildFigmaClipboardHTML(nodes, graph).then((figmaHtml) => {
-      const combined = figmaHtml + internalHtml
-      navigator.clipboard.write([
-        new ClipboardItem({
-          'text/html': new Blob([combined], { type: 'text/html' }),
-          'text/plain': new Blob([names], { type: 'text/plain' })
-        })
-      ])
-    })
   }
 
   function pasteFromHTML(html: string) {