0.8.5: multi-select tracks, group + convert-to-clip

Multi-select
- New `selectedLayerIds: string[]` on the scene store — ordered by
  click, anchor = last entry, always equal to `selectedLayerId`.
- `toggleLayerSelection(id)` shift-click behaviour: adds or removes,
  anchor follows the last click, effectively-locked layers refuse.
- `selectLayer`, `addLayer`, and every selection-reset path keep
  the set in lock-step with the anchor.

Timeline
- Shift-click on a layer row's name toggles that layer's
  membership in the multi-selection. Every selected row highlights
  via `store.selectedLayerIds.includes(track.layerId)`.
- Right-click on a track now preserves an existing multi-selection
  if the clicked track is part of it; lands as a single-select
  otherwise.
- Track context menu adds two entries when ≥1 layer is selected:
  - "Group N selected layers" — calls the new store action and
    drops the group into the topmost selected track's stack slot
    (not at the very top as a naive `addTrackGroup` would).
  - "Convert N selected to clip" — packs the layers into a fresh
    clip with `duration = scene.duration`, deep-clones via
    `structuredClone(toRaw(l))`, drops a single `ClipInstance` on
    a new clipTrack at `startTime = 0`, and positions the
    clipTrack at the topmost selected track's slot.

Fixes
- `removeLayer` no longer unconditionally clears
  `selectedLayerIds` (bulk-replace artifact from the multi-select
  work); the anchor-matched path clears the whole set, the
  non-anchor path only splices out that one id.
- `deselectIfLocked` indentation normalised.

Regression tests
- Multi-select store API: selectLayer sync, toggleLayerSelection
  add/remove/anchor, lock-filter, empty-selection guards.
- `groupSelectedLayers`: happy-path packing, empty-select null
  return, lock-filter, stack-slot pinning.
- `convertSelectedLayersToClip`: packs layers + spawns clipTrack +
  instance (deep-clone integrity pinned via unique per-layer names
  so the cloned-layer lookup is unambiguous), drops the clipTrack
  at the topmost slot, returns null on empty selection, skips
  effectively-locked layers.

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

package.json

@@ -1,7 +1,7 @@
 {
   "name": "animatr",
   "private": true,
-  "version": "0.8.4",
+  "version": "0.8.5",
   "type": "module",
   "scripts": {
     "dev": "vite",

src/components/Timeline.vue

@@ -1877,12 +1877,27 @@ async function onClipBlockContextMenu(e: MouseEvent, ci: ClipInstance) {
 const trackMenu = ref<TrackMenuState | null>(null)
 const trackMenuRef = ref<HTMLDivElement | null>(null)
 
+function onLayerTrackNameClick(e: MouseEvent, track: TimelineLayerTrack) {
+  if (isTrackEffectivelyLocked(track)) return
+  if (e.shiftKey && track.isParent) {
+    store.toggleLayerSelection(track.layerId)
+    return
+  }
+  store.selectLayer(track.layerId)
+}
+
 function onTrackContextMenu(e: MouseEvent, layerId: string) {
   e.preventDefault()
   e.stopPropagation()
   const layer = store.activeLayers.find((l) => l.id === layerId)
   if (!layer) return
-  store.selectLayer(layerId)
+  // If the right-clicked layer isn't already in the multi-selection,
+  // treat the right-click as a single-select so the menu actions
+  // operate on what the user actually clicked. Multi-selected ids
+  // persist so "Group selected" has a real list to work with.
+  if (!store.selectedLayerIds.includes(layerId)) {
+    store.selectLayer(layerId)
+  }
   trackMenu.value = {
     kind: 'layer',
     trackId: layerId,
@@ -1959,6 +1974,16 @@ function toggleSeparated() {
   trackMenu.value = null
 }
 
+function groupSelectedFromMenu() {
+  store.groupSelectedLayers()
+  trackMenu.value = null
+}
+
+function convertSelectedToClipFromMenu() {
+  store.convertSelectedLayersToClip()
+  trackMenu.value = null
+}
+
 function deleteTrack() {
   if (!trackMenu.value) return
   if (trackMenu.value.kind === 'layer') {
@@ -2424,12 +2449,13 @@ onBeforeUnmount(() => {
               <span
                 class="track-name"
                 :class="{
-                  selected: track.layerId === store.selectedLayerId && track.isParent,
+                  selected:
+                    track.isParent && store.selectedLayerIds.includes(track.layerId),
                   parent: track.isParent,
                   sub: !track.isParent,
                 }"
                 :draggable="track.isParent && !isTrackEffectivelyLocked(track)"
-                @click="!isTrackEffectivelyLocked(track) ? store.selectLayer(track.layerId) : null"
+                @click="onLayerTrackNameClick($event, track)"
                 @contextmenu="
                   track.isParent && !isTrackEffectivelyLocked(track)
                     ? onTrackContextMenu($event, track.layerId)
@@ -2999,6 +3025,22 @@ onBeforeUnmount(() => {
               class="kf-menu-trailing-check"
             />
           </button>
+          <button
+            v-if="store.selectedLayerIds.length >= 2"
+            class="kf-menu-item"
+            @click="groupSelectedFromMenu"
+          >
+            <PhFolderPlus :size="12" class="kf-menu-icon" />
+            {{ t('timeline.groupSelected', { n: store.selectedLayerIds.length }) }}
+          </button>
+          <button
+            v-if="store.selectedLayerIds.length >= 1"
+            class="kf-menu-item"
+            @click="convertSelectedToClipFromMenu"
+          >
+            <PhFilmStrip :size="12" class="kf-menu-icon" />
+            {{ t('timeline.convertToClip', { n: store.selectedLayerIds.length }) }}
+          </button>
         </template>
       </template>
       <div class="kf-menu-divider"></div>

src/devtools/tests.ts

@@ -241,6 +241,237 @@ export function registerAllTests(): void {
       await tick()
       expect(s.selectedLayerId).toBe(l.id)
     })
+
+    test('selectLayer keeps selectedLayerIds in sync', () => {
+      const s = makeFreshStore()
+      const a = s.addAsset({ kind: 'rect', name: 'R', width: 10, height: 10, fill: '#fff' })
+      const l = s.addLayer(a.id)!
+      s.selectLayer(l.id)
+      expect(s.selectedLayerIds).toEqual([l.id])
+      s.selectLayer(null)
+      expect(s.selectedLayerIds).toEqual([])
+    })
+
+    test('toggleLayerSelection adds and removes; anchor follows the last click', () => {
+      const s = makeFreshStore()
+      const a = s.addAsset({ kind: 'rect', name: 'R', width: 10, height: 10, fill: '#fff' })
+      const l1 = s.addLayer(a.id)!
+      const l2 = s.addLayer(a.id)!
+      const l3 = s.addLayer(a.id)!
+      s.selectLayer(l1.id)
+      s.toggleLayerSelection(l2.id)
+      s.toggleLayerSelection(l3.id)
+      expect(s.selectedLayerIds).toEqual([l1.id, l2.id, l3.id])
+      expect(s.selectedLayerId).toBe(l3.id)
+      // Removing the anchor moves the anchor back to the new last entry.
+      s.toggleLayerSelection(l3.id)
+      expect(s.selectedLayerIds).toEqual([l1.id, l2.id])
+      expect(s.selectedLayerId).toBe(l2.id)
+      // Removing the last remaining entry drops the anchor to null.
+      s.toggleLayerSelection(l2.id)
+      s.toggleLayerSelection(l1.id)
+      expect(s.selectedLayerIds).toEqual([])
+      expect(s.selectedLayerId).toBe(null)
+    })
+
+    test('toggleLayerSelection skips layers locked directly or by group', () => {
+      const s = makeFreshStore()
+      const a = s.addAsset({ kind: 'rect', name: 'R', width: 10, height: 10, fill: '#fff' })
+      const lFree = s.addLayer(a.id)!
+      const lDirect = s.addLayer(a.id)!
+      const lInGroup = s.addLayer(a.id)!
+      s.setTrackLocked(lDirect.id, true)
+      const g = s.addTrackGroup('G')
+      s.moveTrackIntoGroup(lInGroup.id, g.id)
+      s.setTrackLocked(g.id, true)
+      s.selectLayer(lFree.id)
+      s.toggleLayerSelection(lDirect.id)
+      s.toggleLayerSelection(lInGroup.id)
+      // Neither locked layer was added; the free one stays as the
+      // only selection.
+      expect(s.selectedLayerIds).toEqual([lFree.id])
+    })
+
+    test('groupSelectedLayers moves every selected layer into a fresh group', () => {
+      const s = makeFreshStore()
+      const a = s.addAsset({ kind: 'rect', name: 'R', width: 10, height: 10, fill: '#fff' })
+      const l1 = s.addLayer(a.id)!
+      const l2 = s.addLayer(a.id)!
+      const l3 = s.addLayer(a.id)!
+      s.selectLayer(l1.id)
+      s.toggleLayerSelection(l2.id)
+      s.toggleLayerSelection(l3.id)
+      const groupId = s.groupSelectedLayers()!
+      expect(groupId).toBeTruthy()
+      const g = s.scene.groups!.find((x) => x.id === groupId)!
+      expect(g.childIds.includes(l1.id)).toBe(true)
+      expect(g.childIds.includes(l2.id)).toBe(true)
+      expect(g.childIds.includes(l3.id)).toBe(true)
+      // The layers also get removed from the top-level trackOrder
+      // since moveTrackIntoGroup handles that.
+      const order = s.scene.trackOrder ?? []
+      expect(order.includes(l1.id)).toBe(false)
+      expect(order.includes(l2.id)).toBe(false)
+      expect(order.includes(l3.id)).toBe(false)
+      expect(order.includes(groupId)).toBe(true)
+    })
+
+    test('groupSelectedLayers returns null with an empty selection', () => {
+      const s = makeFreshStore()
+      const groupsBefore = (s.scene.groups ?? []).length
+      const result = s.groupSelectedLayers()
+      expect(result).toBe(null)
+      // Nothing was created.
+      expect((s.scene.groups ?? []).length).toBe(groupsBefore)
+    })
+
+    test('groupSelectedLayers replaces the topmost selected track\'s stack position', () => {
+      // addLayer inserts at the top (index 0), so after three addLayer
+      // calls trackOrder reads top→bottom: [l3, l2, l1]. Picking l2
+      // and l1 to group (two layers NOT at the top) should produce a
+      // group at index 1, not at the top of the stack.
+      const s = makeFreshStore()
+      const a = s.addAsset({ kind: 'rect', name: 'R', width: 10, height: 10, fill: '#fff' })
+      const l1 = s.addLayer(a.id)!
+      const l2 = s.addLayer(a.id)!
+      const l3 = s.addLayer(a.id)!
+      const before = [...s.scene.trackOrder!]
+      expect(before).toEqual([l3.id, l2.id, l1.id])
+      s.selectLayer(l2.id)
+      s.toggleLayerSelection(l1.id)
+      const groupId = s.groupSelectedLayers()!
+      const after = s.scene.trackOrder!
+      // Group sits where l2 used to be (index 1); l3 still at top;
+      // l1 and l2 are no longer top-level.
+      expect(after[0]).toBe(l3.id)
+      expect(after[1]).toBe(groupId)
+      expect(after.includes(l1.id)).toBe(false)
+      expect(after.includes(l2.id)).toBe(false)
+    })
+
+    test('convertSelectedLayersToClip packs selected layers into a fresh clip + instance', () => {
+      const s = makeFreshStore()
+      const a = s.addAsset({ kind: 'rect', name: 'R', width: 10, height: 10, fill: '#fff' })
+      // Give each layer a unique name up-front so we can look them up
+      // unambiguously inside the packed clip. Bare `addLayer(asset.id)`
+      // falls back to the asset name — three layers would all read "R"
+      // and `find(l => l.name === ...)` would return the first match.
+      const l1 = s.addLayer(a.id, 'one')!
+      const l2 = s.addLayer(a.id, 'two')!
+      const l3 = s.addLayer(a.id, 'three')!
+      // Seed a non-default keyframe so we can confirm the clip owns an
+      // independent copy of the original layer's data.
+      s.upsertKeyframe(l2.id, 1.5, { x: 123 })
+      const kfCount = l2.keyframes.length
+      s.selectLayer(l1.id)
+      s.toggleLayerSelection(l2.id)
+      expect(s.selectedLayerIds.length).toBe(2)
+
+      const clipId = s.convertSelectedLayersToClip('My Clip')!
+      expect(clipId).toBeTruthy()
+
+      // Clip exists with the packed layers and a duration that matches
+      // the scene so absolute kf times still land where they were.
+      const clip = s.scene.clips!.find((c) => c.id === clipId)!
+      expect(clip.name).toBe('My Clip')
+      expect(clip.duration).toBe(s.scene.duration)
+      expect(clip.layers.length).toBe(2)
+      // The kf data survives the round-trip.
+      const clonedL2 = clip.layers.find((l) => l.name === 'two')!
+      expect(clonedL2).toBeTruthy()
+      expect(clonedL2.keyframes.length).toBe(kfCount)
+      expect(clonedL2.keyframes.some((k) => Math.abs(k.time - 1.5) < 1e-6)).toBe(true)
+
+      // Originals removed from scene.layers + trackOrder.
+      expect(s.scene.layers.some((l) => l.id === l1.id)).toBe(false)
+      expect(s.scene.layers.some((l) => l.id === l2.id)).toBe(false)
+      expect(s.scene.layers.some((l) => l.id === l3.id)).toBe(true)
+      expect(s.scene.trackOrder!.includes(l1.id)).toBe(false)
+      expect(s.scene.trackOrder!.includes(l2.id)).toBe(false)
+
+      // Exactly one clipTrack + one instance created; the instance
+      // sits at startTime 0 so the packed layers' absolute kf times
+      // continue to fire at their original scene times.
+      const clipTrackIds = (s.scene.clipTracks ?? []).map((t) => t.id)
+      const matching = (s.scene.clipInstances ?? []).filter(
+        (ci) => ci.clipId === clipId,
+      )
+      expect(matching.length).toBe(1)
+      expect(clipTrackIds.includes(matching[0].clipTrackId)).toBe(true)
+      expect(matching[0].startTime).toBe(0)
+
+      // The clone is independent: mutating the clip's layer doesn't
+      // affect the source (l2 is gone, but the data pointer shouldn't
+      // have been shared).
+      clonedL2.keyframes[0].time = 99
+      // (no crash means the refs are decoupled; l2 is already gone)
+    })
+
+    test('convertSelectedLayersToClip drops the clipTrack at the topmost selected slot', () => {
+      const s = makeFreshStore()
+      const a = s.addAsset({ kind: 'rect', name: 'R', width: 10, height: 10, fill: '#fff' })
+      const l1 = s.addLayer(a.id)!
+      const l2 = s.addLayer(a.id)!
+      const l3 = s.addLayer(a.id)!
+      // addLayer prepends → trackOrder reads top-to-bottom [l3, l2, l1].
+      s.selectLayer(l2.id)
+      s.toggleLayerSelection(l1.id)
+      s.convertSelectedLayersToClip()
+      const order = s.scene.trackOrder ?? []
+      // l3 is still at the top (index 0); the clipTrack replaces l2's
+      // old slot (index 1); l1's slot is collapsed away.
+      expect(order[0]).toBe(l3.id)
+      expect(order.length).toBe(2)
+      const clipTrackId = (s.scene.clipTracks ?? []).slice(-1)[0].id
+      expect(order[1]).toBe(clipTrackId)
+    })
+
+    test('convertSelectedLayersToClip returns null with an empty selection', () => {
+      const s = makeFreshStore()
+      expect(s.convertSelectedLayersToClip()).toBe(null)
+      expect((s.scene.clips ?? []).length).toBe(0)
+      expect((s.scene.clipTracks ?? []).length).toBe(0)
+      expect((s.scene.clipInstances ?? []).length).toBe(0)
+    })
+
+    test('convertSelectedLayersToClip skips effectively-locked layers', () => {
+      const s = makeFreshStore()
+      const a = s.addAsset({ kind: 'rect', name: 'R', width: 10, height: 10, fill: '#fff' })
+      const lFree = s.addLayer(a.id)!
+      const lLocked = s.addLayer(a.id)!
+      s.setTrackLocked(lLocked.id, true)
+      s.selectedLayerIds = [lFree.id, lLocked.id]
+      s.selectedLayerId = lLocked.id
+      const clipId = s.convertSelectedLayersToClip()!
+      const clip = s.scene.clips!.find((c) => c.id === clipId)!
+      expect(clip.layers.length).toBe(1)
+      expect(clip.layers[0].name).toBe(lFree.name)
+      // Locked layer stays put.
+      expect(s.scene.layers.some((l) => l.id === lLocked.id)).toBe(true)
+    })
+
+    test('groupSelectedLayers skips layers that are effectively locked', () => {
+      // Locked ones shouldn't land in the fresh group — they stay
+      // wherever they were.
+      const s = makeFreshStore()
+      const a = s.addAsset({ kind: 'rect', name: 'R', width: 10, height: 10, fill: '#fff' })
+      const lFree1 = s.addLayer(a.id)!
+      const lLocked = s.addLayer(a.id)!
+      const lFree2 = s.addLayer(a.id)!
+      s.setTrackLocked(lLocked.id, true)
+      // Locking a layer deselects it, so toggleLayerSelection also
+      // silently refuses; build the selection manually to exercise
+      // the filter inside `groupSelectedLayers`.
+      s.selectedLayerIds = [lFree1.id, lLocked.id, lFree2.id]
+      s.selectedLayerId = lFree2.id
+      const groupId = s.groupSelectedLayers()!
+      const g = s.scene.groups!.find((x) => x.id === groupId)!
+      expect(g.childIds.includes(lFree1.id)).toBe(true)
+      expect(g.childIds.includes(lFree2.id)).toBe(true)
+      expect(g.childIds.includes(lLocked.id)).toBe(false)
+      // The locked layer still sits in the top-level track order.
+      expect(s.scene.trackOrder!.includes(lLocked.id)).toBe(true)
+    })
   })
 
   suite('scene store — keyframes', () => {

src/i18n/messages.ts

@@ -225,6 +225,8 @@ export const en = {
       confirm: 'Apply',
     },
     ungroup: 'Ungroup',
+    groupSelected: 'Group {n} selected layers',
+    convertToClip: 'Convert {n} selected to clip',
     renameGroup: 'Rename group',
     renameScriptTrack: 'Rename script track',
     resizeTrackColumn: 'Drag to resize track name column',

src/stores/scene.ts

@@ -1,4 +1,5 @@
 import { defineStore } from 'pinia'
+import { toRaw } from 'vue'
 import type {
   Action,
   AnimatableProps,
@@ -64,7 +65,14 @@ export type ButtonEditMode = 'states' | 'hit'
 
 interface State {
   scene: Scene
+  /** Primary (anchor) selection — drives the Properties panel and
+   *  any code that expects a single focused layer. Always matches
+   *  the last entry of `selectedLayerIds`. */
   selectedLayerId: string | null
+  /** Multi-selection. Order is click order — the last entry is the
+   *  anchor. Used by group-selected / delete-selected and any
+   *  operation that needs the whole set. */
+  selectedLayerIds: string[]
   playhead: number
   playing: boolean
   activeClipId: string | null
@@ -259,6 +267,7 @@ export const useSceneStore = defineStore('scene', {
   state: (): State => ({
     scene: createBlankScene(),
     selectedLayerId: null,
+    selectedLayerIds: [],
     playhead: 0,
     playing: false,
     activeClipId: null,
@@ -407,6 +416,7 @@ export const useSceneStore = defineStore('scene', {
         if (!order.includes(layer.id)) order.unshift(layer.id)
       }
       this.selectedLayerId = layer.id
+      this.selectedLayerIds = [layer.id]
       return layer
     },
     removeLayer(id: string) {
@@ -416,7 +426,12 @@ export const useSceneStore = defineStore('scene', {
       if (!this.activeClipId && this.scene.trackOrder) {
         this.scene.trackOrder = this.scene.trackOrder.filter((x) => x !== id)
       }
-      if (this.selectedLayerId === id) this.selectedLayerId = null
+      if (this.selectedLayerId === id) {
+        this.selectedLayerId = null
+        this.selectedLayerIds = []
+      } else if (this.selectedLayerIds.includes(id)) {
+        this.selectedLayerIds = this.selectedLayerIds.filter((x) => x !== id)
+      }
     },
     moveLayer(fromIndex: number, toIndex: number) {
       const arr = this.activeLayers
@@ -438,6 +453,29 @@ export const useSceneStore = defineStore('scene', {
     },
     selectLayer(id: string | null) {
       this.selectedLayerId = id
+      this.selectedLayerIds = id ? [id] : []
+    },
+    /** Shift-click behaviour: add the layer to the selection if it's
+     *  not already there; otherwise remove it. The anchor moves to
+     *  the most-recently-clicked id so the Properties panel follows
+     *  the user's last touch. Layers that can't be selected (locked
+     *  directly or through a locked group) are skipped. */
+    toggleLayerSelection(id: string) {
+      const layer = this.activeLayers.find((l) => l.id === id)
+      if (!layer) return
+      if (layer.locked) return
+      for (const g of this.scene.groups ?? []) {
+        if (g.locked && g.childIds.includes(id)) return
+      }
+      const existing = this.selectedLayerIds.indexOf(id)
+      if (existing >= 0) {
+        this.selectedLayerIds.splice(existing, 1)
+        this.selectedLayerId =
+          this.selectedLayerIds[this.selectedLayerIds.length - 1] ?? null
+      } else {
+        this.selectedLayerIds.push(id)
+        this.selectedLayerId = id
+      }
     },
     setPlayhead(t: number) {
       this.playhead = Math.max(0, Math.min(this.activeDuration, t))
@@ -1269,15 +1307,18 @@ export const useSceneStore = defineStore('scene', {
       const sel = this.activeLayers.find((l) => l.id === id)
       if (!sel) {
         this.selectedLayerId = null
+        this.selectedLayerIds = []
         return
       }
       if (sel.locked) {
         this.selectedLayerId = null
+        this.selectedLayerIds = []
         return
       }
       for (const g of this.scene.groups ?? []) {
         if (g.locked && g.childIds.includes(id)) {
           this.selectedLayerId = null
+          this.selectedLayerIds = []
           return
         }
       }
@@ -1425,6 +1466,7 @@ export const useSceneStore = defineStore('scene', {
       this.activeButtonState = 'normal'
       this.activeClipId = null
       this.selectedLayerId = null
+      this.selectedLayerIds = []
       this.playhead = BUTTON_STATE_TIMES.normal
       this.playing = false
     },
@@ -1432,6 +1474,7 @@ export const useSceneStore = defineStore('scene', {
       if (!this.activeButtonAssetId) return
       this.activeButtonEditMode = mode
       this.selectedLayerId = null
+      this.selectedLayerIds = []
       if (mode === 'states') {
         // Landing back in states-mode: keep the last content state (or
         // default to normal) and sync the playhead to its kf-time.
@@ -1453,12 +1496,14 @@ export const useSceneStore = defineStore('scene', {
       // state's fixed time so existing kf mutation paths target it.
       this.playhead = BUTTON_STATE_TIMES[state]
       this.selectedLayerId = null
+      this.selectedLayerIds = []
     },
     exitButtonAssetEdit() {
       this.activeButtonAssetId = null
       this.activeButtonEditMode = null
       this.activeButtonState = null
       this.selectedLayerId = null
+      this.selectedLayerIds = []
       this.playhead = 0
       this.playing = false
     },
@@ -1571,6 +1616,7 @@ export const useSceneStore = defineStore('scene', {
     loadScene(scene: Scene) {
       this.scene = normalizeScene(scene)
       this.selectedLayerId = null
+      this.selectedLayerIds = []
       this.playhead = 0
       this.playing = false
       this.activeClipId = null
@@ -1589,6 +1635,89 @@ export const useSceneStore = defineStore('scene', {
       if (!this.scene.clipTracks?.length) this.addClipTrack()
       return clip
     },
+    /** Pull the currently-selected (unlocked, top-level) layers out of
+     *  `scene.layers`, pack them into a brand-new Clip, and drop a
+     *  single ClipInstance on a fresh ClipTrack at the topmost
+     *  selected track's stack position. The clip instance starts at
+     *  `startTime = 0` and shares the scene duration — so layer kfs
+     *  keep their absolute times and on-stage visuals are unchanged.
+     *  Returns the new clip id, or null if the selection is empty. */
+    convertSelectedLayersToClip(name?: string): string | null {
+      const ids = this.selectedLayerIds.filter((id) => {
+        const layer = this.scene.layers.find((l) => l.id === id)
+        if (!layer) return false
+        if (layer.locked) return false
+        for (const g of this.scene.groups ?? []) {
+          if (g.locked && g.childIds.includes(id)) return false
+        }
+        return true
+      })
+      if (ids.length === 0) return null
+
+      // Topmost index in trackOrder among the layers we're about to
+      // fold away. If a selected layer is already inside a group it
+      // doesn't appear in trackOrder directly, so it can't anchor
+      // the new clipTrack's position — we fall back to "top" if
+      // nothing anchors.
+      const order = (this.scene.trackOrder ||= [])
+      let insertAt = Infinity
+      for (const id of ids) {
+        const i = order.indexOf(id)
+        if (i >= 0 && i < insertAt) insertAt = i
+      }
+
+      // Deep-clone the layers so the clip owns independent kf/base
+      // data. `toRaw` strips the Vue/Pinia reactive proxy first so
+      // `structuredClone` sees the underlying plain object graph
+      // (structuredClone refuses to walk a Vue proxy's invisible
+      // internals in some edge cases).
+      const clonedLayers = ids
+        .map((id) => this.scene.layers.find((l) => l.id === id))
+        .filter((l): l is Layer => !!l)
+        .map((l) => structuredClone(toRaw(l)) as Layer)
+
+      const clip: Clip = {
+        id: uid(),
+        name: name?.trim() || 'Clip',
+        duration: this.scene.duration,
+        layers: clonedLayers,
+      }
+      ;(this.scene.clips ||= []).push(clip)
+
+      // Strip the originals out of scene.layers, trackOrder, and any
+      // group they were part of. Clearing in one pass keeps Pinia's
+      // reactivity from thrashing on intermediate states.
+      const idSet = new Set(ids)
+      this.scene.layers = this.scene.layers.filter((l) => !idSet.has(l.id))
+      this.scene.trackOrder = order.filter((x) => !idSet.has(x))
+      for (const g of this.scene.groups ?? []) {
+        g.childIds = g.childIds.filter((x) => !idSet.has(x))
+      }
+
+      // Fresh clip track, sat at the anchor slot instead of
+      // appended to the end (addClipTrack's default).
+      const track: ClipTrack = { id: uid() }
+      ;(this.scene.clipTracks ||= []).push(track)
+      const refreshedOrder = (this.scene.trackOrder ||= [])
+      if (insertAt === Infinity || insertAt > refreshedOrder.length) {
+        refreshedOrder.push(track.id)
+      } else {
+        refreshedOrder.splice(insertAt, 0, track.id)
+      }
+
+      const instance: ClipInstance = {
+        id: uid(),
+        clipId: clip.id,
+        clipTrackId: track.id,
+        startTime: 0,
+      }
+      ;(this.scene.clipInstances ||= []).push(instance)
+
+      this.selectedLayerId = null
+      this.selectedLayerIds = []
+
+      return clip.id
+    },
     removeClip(id: string) {
       if (this.scene.clips) {
         this.scene.clips = this.scene.clips.filter((c) => c.id !== id)
@@ -1599,6 +1728,7 @@ export const useSceneStore = defineStore('scene', {
       if (this.activeClipId === id) {
         this.activeClipId = null
         this.selectedLayerId = null
+      this.selectedLayerIds = []
         this.playhead = 0
       }
     },
@@ -1689,6 +1819,53 @@ export const useSceneStore = defineStore('scene', {
       ;(this.scene.trackOrder ||= []).unshift(group.id)
       return group
     },
+    /** Create a new group and move every currently-selected layer
+     *  into it. Returns the new group's id, or null if no layers are
+     *  selected. Skips layers that are locked (directly or via a
+     *  parent group). The new group replaces the topmost selected
+     *  track's position in the stack — so grouping a run of layers
+     *  sitting in the middle of the timeline doesn't jump the whole
+     *  group up to the top. */
+    groupSelectedLayers(name?: string): string | null {
+      const ids = this.selectedLayerIds.filter((id) => {
+        const layer = this.scene.layers.find((l) => l.id === id)
+        if (!layer) return false
+        if (layer.locked) return false
+        for (const g of this.scene.groups ?? []) {
+          if (g.locked && g.childIds.includes(id)) return false
+        }
+        return true
+      })
+      if (ids.length === 0) return null
+
+      // Compute the topmost (smallest) trackOrder index among the
+      // selected layers BEFORE we touch anything. This is where the
+      // new group will land. Anything outside trackOrder (layer is
+      // already inside another group) doesn't constrain the anchor.
+      const order = (this.scene.trackOrder ||= [])
+      let insertAt = Infinity
+      for (const id of ids) {
+        const i = order.indexOf(id)
+        if (i >= 0 && i < insertAt) insertAt = i
+      }
+
+      const group = this.addTrackGroup(name)
+      // addTrackGroup unshifted the group onto trackOrder[0] — pluck
+      // it back out and splice into the anchor slot. The layers sit
+      // at their original indices at this point; moveTrackIntoGroup
+      // below removes them from trackOrder one by one, collapsing
+      // the stack around the group we've just positioned.
+      if (insertAt !== Infinity) {
+        const gIdx = order.indexOf(group.id)
+        if (gIdx >= 0) order.splice(gIdx, 1)
+        order.splice(insertAt, 0, group.id)
+      }
+
+      for (const id of ids) {
+        this.moveTrackIntoGroup(id, group.id)
+      }
+      return group.id
+    },
     removeTrackGroup(id: string) {
       const group = this.scene.groups?.find((g) => g.id === id)
       if (!group) return
@@ -1754,12 +1931,14 @@ export const useSceneStore = defineStore('scene', {
       this.activeButtonEditMode = null
       this.activeButtonState = null
       this.selectedLayerId = null
+      this.selectedLayerIds = []
       this.playhead = 0
       this.playing = false
     },
     exitClip() {
       this.activeClipId = null
       this.selectedLayerId = null
+      this.selectedLayerIds = []
       this.playhead = 0
       this.playing = false
     },

src/version.ts

@@ -1,2 +1,2 @@
-export const APP_VERSION = '0.8.4'
+export const APP_VERSION = '0.8.5'
 export const APP_NAME = 'RUWIO'

todo

@@ -157,12 +157,18 @@ kann man bei den button-states 200ms transitions einbauen?
 
 elemente in einer gelockten gruppe kann man bearbeiten. bearbeitungsmöglichkeit muss sofort entzogen werden wenn eine gruppe gesperrt ist
 
+wir brauchen mehrfachselection von tracks (shift-click) und gruppiegen. also rechtsklick -> group
+
+wir brauchen mehrfachselection von tracks und konvertierung in clip. also rechtsklick -> convert to clip
+dann werden die tracks direkt als neuer clip an ort und stelle eingefügt
+
+
 
 
 ----
 
 
-wir brauchen mehrfachselection von tracks (shift-click) und gruppiegen. also rechtsklick -> group
+