0.10.3: preloader + multi-scene export parity, jumpToScene rewinds

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

src/components/ExportDialog.vue

@@ -47,7 +47,34 @@ const hasHiddenLayers = computed(() => {
   return false
 })
 
-function sceneClone() {
+function projectClone() {
+  // Project-shaped payload for standalone static exports — the
+  // embedded runtime handles multi-scene playback natively.
+  const project = JSON.parse(JSON.stringify(store.project))
+  if (!skipHidden.value) return project
+  for (const page of project.scenes) {
+    page.layers = page.layers.filter((l: Layer) => !l.editorHidden)
+  }
+  if (Array.isArray(project.clips)) {
+    for (const clip of project.clips) {
+      clip.layers = clip.layers.filter((l: Layer) => !l.editorHidden)
+    }
+  }
+  if (Array.isArray(project.assets)) {
+    for (const asset of project.assets as ButtonAsset[]) {
+      if (asset && asset.kind === 'button' && Array.isArray(asset.layers)) {
+        asset.layers = asset.layers.filter((l: Layer) => !l.editorHidden)
+      }
+    }
+  }
+  return project
+}
+
+function activeSceneClone() {
+  // Scene-shaped payload for linear render paths (webm/mp4 server).
+  // Video is a single timeline — we only render the currently active
+  // page. A user who wants a different scene rendered needs to switch
+  // it in the drawer first.
   const scene = JSON.parse(JSON.stringify(store.scene))
   if (!skipHidden.value) return scene
   scene.layers = scene.layers.filter((l: Layer) => !l.editorHidden)
@@ -67,7 +94,7 @@ function sceneClone() {
 }
 
 function exportScene() {
-  downloadSceneExport(sceneClone())
+  downloadSceneExport(projectClone())
   emit('update:modelValue', false)
 }
 
@@ -77,7 +104,7 @@ function exportRuntime() {
 }
 
 function exportHtml() {
-  downloadExampleHtml(sceneClone())
+  downloadExampleHtml(projectClone())
   emit('update:modelValue', false)
 }
 
@@ -92,7 +119,7 @@ async function exportWebm() {
   }
   store.pause()
   try {
-    await downloadSceneAsVideo(sceneClone(), {
+    await downloadSceneAsVideo(activeSceneClone(), {
       signal: controller.signal,
       onProgress: (p) => {
         if (progress.value) progress.value.progress = p
@@ -120,7 +147,7 @@ async function exportMp4Server() {
   }
   store.pause()
   try {
-    await downloadFromServer(sceneClone(), {
+    await downloadFromServer(activeSceneClone(), {
       signal: controller.signal,
       onProgress: (p) => {
         if (progress.value) progress.value.progress = p