0.8.7: duplicate track via right-click (layer / clip / script)

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

src/components/Timeline.vue

@@ -1998,6 +1998,17 @@ function deleteTrack() {
   trackMenu.value = null
 }
 
+function duplicateTrackFromMenu() {
+  if (!trackMenu.value) return
+  const newId = store.duplicateTrack(trackMenu.value.trackId)
+  trackMenu.value = null
+  if (newId && store.scene.layers.some((l) => l.id === newId)) {
+    // Only layers have a meaningful per-track selection model; clip /
+    // script tracks aren't selected in the same sense.
+    store.selectLayer(newId)
+  }
+}
+
 async function renameFromMenu() {
   if (!trackMenu.value) return
   if (trackMenu.value.kind === 'group') {
@@ -3043,6 +3054,17 @@ onBeforeUnmount(() => {
           </button>
         </template>
       </template>
+      <template v-if="trackMenu.kind !== 'group'">
+        <div class="kf-menu-divider"></div>
+        <button
+          class="kf-menu-item"
+          :disabled="trackMenu.locked"
+          @click="duplicateTrackFromMenu"
+        >
+          <PhCopy :size="12" class="kf-menu-icon" />
+          {{ t('timeline.duplicate') }}
+        </button>
+      </template>
       <div class="kf-menu-divider"></div>
       <button class="kf-menu-item danger" @click="deleteTrack">
         <PhTrash :size="12" class="kf-menu-icon" />