feat(layers): add layer management panel

commands/document.test.ts

@@ -1,6 +1,24 @@
 import { describe, expect, test } from "bun:test";
 import { createInitialAppState } from "@editor/initial-state";
-import { documentAddArtboardCommand, documentAddAssetCommand, documentAddImageLayerCommand, documentSetArtboardBoundsCommand } from "./document";
+import {
+  documentAddArtboardCommand,
+  documentAddAssetCommand,
+  documentAddGroupLayerCommand,
+  documentAddImageLayerCommand,
+  documentGroupLayersCommand,
+  documentMoveLayerCommand,
+  documentRemoveArtboardCommand,
+  documentRemoveLayerCommand,
+  documentRenameArtboardCommand,
+  documentRenameLayerCommand,
+  documentSetArtboardBoundsCommand,
+  documentSetArtboardLockedCommand,
+  documentSetArtboardVisibleCommand,
+  documentSetLayerClippingMaskCommand,
+  documentSetLayerLockedCommand,
+  documentSetLayerVisibleCommand,
+  documentUngroupLayerCommand,
+} from "./document";
 
 describe("document commands", () => {
   test("adds transparent artboard", () => {
@@ -15,6 +33,8 @@ describe("document commands", () => {
         name: "Artboard 1",
         bounds: { x: 0, y: 0, w: 320, h: 240 },
         backgroundColor: "transparent",
+        visible: true,
+        locked: false,
         layers: [],
       },
     ]);
@@ -57,6 +77,114 @@ describe("document commands", () => {
     expect(next.document.artboards[0]?.layers.map((layer) => layer.id)).toEqual(["l1"]);
   });
 
+  test("adds group layers", () => {
+    const state = documentAddArtboardCommand.execute(
+      { state: createInitialAppState("Test") },
+      { id: "a1", name: "Artboard 1", bounds: { x: 0, y: 0, w: 320, h: 240 } },
+    );
+
+    const next = documentAddGroupLayerCommand.execute({ state }, { artboardId: "a1", group: group("g1", "Group") });
+
+    expect(next.document.artboards[0]?.layers).toEqual([group("g1", "Group")]);
+    expect(next.editor.selection.layerIds).toEqual(["g1"]);
+  });
+
+  test("moves layers", () => {
+    const state = documentWithLayers([group("a", "A"), group("b", "B"), group("c", "C")]);
+
+    const next = documentMoveLayerCommand.execute({ state }, { layerId: "a", toArtboardId: "a1", toIndex: 2 });
+
+    expect(next.document.artboards[0]?.layers.map((layer) => layer.id)).toEqual(["b", "c", "a"]);
+  });
+
+  test("groups and ungroups top-level layers", () => {
+    const state = documentWithLayers([group("a", "A"), group("b", "B"), group("c", "C")]);
+    const grouped = documentGroupLayersCommand.execute({ state }, { artboardId: "a1", layerIds: ["a", "b"], group: group("g", "Group") });
+
+    expect(grouped.document.artboards[0]?.layers.map((layer) => layer.id)).toEqual(["g", "c"]);
+    expect((grouped.document.artboards[0]?.layers[0] as { children: { id: string }[] }).children.map((layer) => layer.id)).toEqual(["a", "b"]);
+    expect(grouped.editor.selection.layerIds).toEqual(["g"]);
+
+    const ungrouped = documentUngroupLayerCommand.execute({ state: grouped }, { groupId: "g" });
+
+    expect(ungrouped.document.artboards[0]?.layers.map((layer) => layer.id)).toEqual(["a", "b", "c"]);
+    expect(ungrouped.editor.selection.layerIds).toEqual(["a", "b"]);
+  });
+
+  test("removes layers", () => {
+    const state = documentWithLayers([group("a", "A"), group("b", "B")]);
+    const selectedState = { ...state, editor: { ...state.editor, selection: { artboardId: "a1", layerIds: ["a"] } } };
+    const next = documentRemoveLayerCommand.execute({ state: selectedState }, { layerId: "a" });
+
+    expect(next.document.artboards[0]?.layers.map((layer) => layer.id)).toEqual(["b"]);
+    expect(next.editor.selection.layerIds).toEqual([]);
+  });
+
+  test("removes artboards and clears artboard selection", () => {
+    const state = documentAddArtboardCommand.execute(
+      { state: createInitialAppState("Test") },
+      { id: "a1", name: "Artboard 1", bounds: { x: 0, y: 0, w: 320, h: 240 } },
+    );
+    const selectedState = { ...state, editor: { ...state.editor, selection: { artboardId: "a1", layerIds: [] } } };
+
+    const next = documentRemoveArtboardCommand.execute({ state: selectedState }, { id: "a1" });
+
+    expect(next.document.artboards).toEqual([]);
+    expect(next.editor.selection).toEqual({ layerIds: [] });
+  });
+
+  test("renames artboards and layers", () => {
+    const state = documentWithLayers([group("a", "A")]);
+    const renamedArtboard = documentRenameArtboardCommand.execute({ state }, { id: "a1", name: "New Artboard" });
+    const renamedLayer = documentRenameLayerCommand.execute({ state: renamedArtboard }, { layerId: "a", name: "New Layer" });
+
+    expect(renamedLayer.document.artboards[0]?.name).toBe("New Artboard");
+    expect(renamedLayer.document.artboards[0]?.layers[0]?.name).toBe("New Layer");
+  });
+
+  test("sets and clears layer clipping masks", () => {
+    const state = documentWithLayers([group("mask", "Mask"), group("target", "Target")]);
+    const masked = documentSetLayerClippingMaskCommand.execute({ state }, { layerId: "target", maskLayerId: "mask" });
+
+    expect(masked.document.artboards[0]?.layers[1]?.clippingMask).toEqual({ maskLayerId: "mask" });
+
+    const cleared = documentSetLayerClippingMaskCommand.execute({ state: masked }, { layerId: "target" });
+
+    expect(cleared.document.artboards[0]?.layers[1]?.clippingMask).toBeUndefined();
+  });
+
+  test("moves masked layers directly after their mask", () => {
+    const state = documentWithLayers([group("target", "Target"), group("other", "Other"), group("mask", "Mask")]);
+
+    const masked = documentSetLayerClippingMaskCommand.execute({ state }, { layerId: "target", maskLayerId: "mask" });
+
+    expect(masked.document.artboards[0]?.layers.map((layer) => layer.id)).toEqual(["other", "mask", "target"]);
+    expect(masked.document.artboards[0]?.layers[2]?.clippingMask).toEqual({ maskLayerId: "mask" });
+  });
+
+  test("sets artboard visibility and lock state", () => {
+    const state = documentAddArtboardCommand.execute(
+      { state: createInitialAppState("Test") },
+      { id: "a1", name: "Artboard 1", bounds: { x: 0, y: 0, w: 320, h: 240 } },
+    );
+
+    const hidden = documentSetArtboardVisibleCommand.execute({ state }, { id: "a1", visible: false });
+    const locked = documentSetArtboardLockedCommand.execute({ state: hidden }, { id: "a1", locked: true });
+
+    expect(locked.document.artboards[0]?.visible).toBe(false);
+    expect(locked.document.artboards[0]?.locked).toBe(true);
+  });
+
+  test("sets layer visibility and lock state", () => {
+    const state = documentWithLayers([group("a", "A")]);
+
+    const hidden = documentSetLayerVisibleCommand.execute({ state }, { layerId: "a", visible: false });
+    const locked = documentSetLayerLockedCommand.execute({ state: hidden }, { layerId: "a", locked: true });
+
+    expect(locked.document.artboards[0]?.layers[0]?.visible).toBe(false);
+    expect(locked.document.artboards[0]?.layers[0]?.locked).toBe(true);
+  });
+
   test("sets artboard bounds", () => {
     const state = documentAddArtboardCommand.execute(
       { state: createInitialAppState("Test") },
@@ -68,3 +196,30 @@ describe("document commands", () => {
     expect(next.document.artboards[0]?.bounds).toEqual({ x: 10, y: 20, w: 640, h: 480 });
   });
 });
+
+function documentWithLayers(layers: ReturnType<typeof group>[]) {
+  return {
+    ...createInitialAppState("Test"),
+    document: {
+      ...createInitialAppState("Test").document,
+      artboards: [{ id: "a1", name: "Artboard 1", bounds: { x: 0, y: 0, w: 320, h: 240 }, backgroundColor: "transparent", visible: true, locked: false, layers }],
+    },
+    editor: {
+      ...createInitialAppState("Test").editor,
+      selection: { artboardId: "a1", layerIds: [] },
+    },
+  };
+}
+
+function group(id: string, name: string) {
+  return {
+    id,
+    type: "group" as const,
+    name,
+    visible: true,
+    locked: false,
+    opacity: 1,
+    transform: { position: { x: 0, y: 0 }, scale: { x: 1, y: 1 }, rotation: 0 },
+    children: [],
+  };
+}

commands/document.ts

@@ -1,7 +1,10 @@
 import type { Asset } from "@core/asset";
-import type { ImageLayer } from "@core/image-layer";
+import type { ImageDocument } from "@core/document";
 import type { Rect } from "@core/geometry";
-import type { ArtboardId } from "@core/id";
+import type { ArtboardId, LayerId } from "@core/id";
+import type { ImageLayer } from "@core/image-layer";
+import type { Layer } from "@core/layer";
+import type { LayerGroup } from "@core/layer-group";
 import type { Command } from "./command";
 import { commandIds } from "./ids";
 
@@ -16,15 +19,82 @@ export type DocumentSetArtboardBoundsPayload = {
   bounds: Rect;
 };
 
+export type DocumentRemoveArtboardPayload = {
+  id: ArtboardId;
+};
+
+export type DocumentSetArtboardVisiblePayload = {
+  id: ArtboardId;
+  visible: boolean;
+};
+
+export type DocumentSetArtboardLockedPayload = {
+  id: ArtboardId;
+  locked: boolean;
+};
+
+export type DocumentRenameArtboardPayload = {
+  id: ArtboardId;
+  name: string;
+};
+
 export type DocumentAddAssetPayload = {
   asset: Asset;
 };
 
 export type DocumentAddImageLayerPayload = {
   artboardId: ArtboardId;
+  parentGroupId?: LayerId;
   layer: ImageLayer;
 };
 
+export type DocumentAddGroupLayerPayload = {
+  artboardId: ArtboardId;
+  parentGroupId?: LayerId;
+  group: LayerGroup;
+};
+
+export type DocumentMoveLayerPayload = {
+  layerId: LayerId;
+  toArtboardId: ArtboardId;
+  toParentGroupId?: LayerId;
+  toIndex: number;
+};
+
+export type DocumentGroupLayersPayload = {
+  artboardId: ArtboardId;
+  layerIds: LayerId[];
+  group: LayerGroup;
+};
+
+export type DocumentUngroupLayerPayload = {
+  groupId: LayerId;
+};
+
+export type DocumentRemoveLayerPayload = {
+  layerId: LayerId;
+};
+
+export type DocumentSetLayerVisiblePayload = {
+  layerId: LayerId;
+  visible: boolean;
+};
+
+export type DocumentSetLayerLockedPayload = {
+  layerId: LayerId;
+  locked: boolean;
+};
+
+export type DocumentRenameLayerPayload = {
+  layerId: LayerId;
+  name: string;
+};
+
+export type DocumentSetLayerClippingMaskPayload = {
+  layerId: LayerId;
+  maskLayerId?: LayerId;
+};
+
 export const documentAddArtboardCommand: Command<DocumentAddArtboardPayload> = {
   id: commandIds.documentAddArtboard,
   name: "Add artboard",
@@ -40,6 +110,8 @@ export const documentAddArtboardCommand: Command<DocumentAddArtboardPayload> = {
             name: payload.name,
             bounds: payload.bounds,
             backgroundColor: "transparent",
+            visible: true,
+            locked: false,
             layers: [],
           },
         ],
@@ -64,6 +136,66 @@ export const documentSetArtboardBoundsCommand: Command<DocumentSetArtboardBounds
   },
 };
 
+export const documentRemoveArtboardCommand: Command<DocumentRemoveArtboardPayload> = {
+  id: commandIds.documentRemoveArtboard,
+  name: "Remove artboard",
+  execute({ state }, payload) {
+    const removedSelectedArtboard = state.editor.selection.artboardId === payload.id;
+    return {
+      ...state,
+      document: {
+        ...state.document,
+        artboards: state.document.artboards.filter((artboard) => artboard.id !== payload.id),
+      },
+      editor: removedSelectedArtboard ? { ...state.editor, selection: { layerIds: [] } } : state.editor,
+    };
+  },
+};
+
+export const documentSetArtboardVisibleCommand: Command<DocumentSetArtboardVisiblePayload> = {
+  id: commandIds.documentSetArtboardVisible,
+  name: "Set artboard visible",
+  execute({ state }, payload) {
+    return {
+      ...state,
+      document: {
+        ...state.document,
+        artboards: state.document.artboards.map((artboard) => (artboard.id === payload.id ? { ...artboard, visible: payload.visible } : artboard)),
+      },
+    };
+  },
+};
+
+export const documentSetArtboardLockedCommand: Command<DocumentSetArtboardLockedPayload> = {
+  id: commandIds.documentSetArtboardLocked,
+  name: "Set artboard locked",
+  execute({ state }, payload) {
+    return {
+      ...state,
+      document: {
+        ...state.document,
+        artboards: state.document.artboards.map((artboard) => (artboard.id === payload.id ? { ...artboard, locked: payload.locked } : artboard)),
+      },
+    };
+  },
+};
+
+export const documentRenameArtboardCommand: Command<DocumentRenameArtboardPayload> = {
+  id: commandIds.documentRenameArtboard,
+  name: "Rename artboard",
+  execute({ state }, payload) {
+    const name = payload.name.trim();
+    if (!name) return state;
+    return {
+      ...state,
+      document: {
+        ...state.document,
+        artboards: state.document.artboards.map((artboard) => (artboard.id === payload.id ? { ...artboard, name } : artboard)),
+      },
+    };
+  },
+};
+
 export const documentAddAssetCommand: Command<DocumentAddAssetPayload> = {
   id: commandIds.documentAddAsset,
   name: "Add asset",
@@ -86,12 +218,164 @@ export const documentAddImageLayerCommand: Command<DocumentAddImageLayerPayload>
   execute({ state }, payload) {
     return {
       ...state,
-      document: {
+      document: insertLayer(state.document, payload.artboardId, payload.parentGroupId, payload.layer),
-        ...state.document,
+    };
-        artboards: state.document.artboards.map((artboard) =>
-          artboard.id === payload.artboardId ? { ...artboard, layers: [...artboard.layers, payload.layer] } : artboard,
-        ),
   },
+};
+
+export const documentAddGroupLayerCommand: Command<DocumentAddGroupLayerPayload> = {
+  id: commandIds.documentAddGroupLayer,
+  name: "Add group layer",
+  execute({ state }, payload) {
+    return {
+      ...state,
+      document: insertLayer(state.document, payload.artboardId, payload.parentGroupId, payload.group),
+      editor: { ...state.editor, selection: { artboardId: payload.artboardId, layerIds: [payload.group.id] } },
+    };
+  },
+};
+
+export const documentMoveLayerCommand: Command<DocumentMoveLayerPayload> = {
+  id: commandIds.documentMoveLayer,
+  name: "Move layer",
+  execute({ state }, payload) {
+    if (payload.toParentGroupId && !findGroup(state.document, payload.toParentGroupId)) return state;
+
+    const removed = removeLayerFromDocument(state.document, payload.layerId);
+    if (!removed.layer) return state;
+    if (payload.toParentGroupId && !findGroup(removed.document, payload.toParentGroupId)) return state;
+
+    return {
+      ...state,
+      document: insertLayer(removed.document, payload.toArtboardId, payload.toParentGroupId, removed.layer, payload.toIndex),
+    };
+  },
+};
+
+export const documentGroupLayersCommand: Command<DocumentGroupLayersPayload> = {
+  id: commandIds.documentGroupLayers,
+  name: "Group layers",
+  execute({ state }, payload) {
+    const uniqueIds = [...new Set(payload.layerIds)];
+    if (uniqueIds.length === 0) return state;
+
+    const artboard = state.document.artboards.find((candidate) => candidate.id === payload.artboardId);
+    if (!artboard) return state;
+
+    const selected = artboard.layers.filter((layer) => uniqueIds.includes(layer.id));
+    if (selected.length === 0) return state;
+
+    const firstIndex = artboard.layers.findIndex((layer) => layer.id === selected[0]?.id);
+    const group: LayerGroup = { ...payload.group, children: selected };
+    const document = {
+      ...state.document,
+      artboards: state.document.artboards.map((candidate) =>
+        candidate.id === payload.artboardId
+          ? { ...candidate, layers: [...candidate.layers.filter((layer) => !uniqueIds.includes(layer.id)).slice(0, firstIndex), group, ...candidate.layers.filter((layer) => !uniqueIds.includes(layer.id)).slice(firstIndex)] }
+          : candidate,
+      ),
+    };
+
+    return {
+      ...state,
+      document,
+      editor: { ...state.editor, selection: { artboardId: payload.artboardId, layerIds: [group.id] } },
+    };
+  },
+};
+
+export const documentUngroupLayerCommand: Command<DocumentUngroupLayerPayload> = {
+  id: commandIds.documentUngroupLayer,
+  name: "Ungroup layer",
+  execute({ state }, payload) {
+    const result = ungroupLayerInDocument(state.document, payload.groupId);
+    if (!result.changed) return state;
+
+    return {
+      ...state,
+      document: result.document,
+      editor: { ...state.editor, selection: { artboardId: result.artboardId, layerIds: result.children.map((layer) => layer.id) } },
+    };
+  },
+};
+
+export const documentSetLayerVisibleCommand: Command<DocumentSetLayerVisiblePayload> = {
+  id: commandIds.documentSetLayerVisible,
+  name: "Set layer visible",
+  execute({ state }, payload) {
+    return { ...state, document: mapLayerInDocument(state.document, payload.layerId, (layer) => ({ ...layer, visible: payload.visible })) };
+  },
+};
+
+export const documentSetLayerLockedCommand: Command<DocumentSetLayerLockedPayload> = {
+  id: commandIds.documentSetLayerLocked,
+  name: "Set layer locked",
+  execute({ state }, payload) {
+    return { ...state, document: mapLayerInDocument(state.document, payload.layerId, (layer) => ({ ...layer, locked: payload.locked })) };
+  },
+};
+
+export const documentRenameLayerCommand: Command<DocumentRenameLayerPayload> = {
+  id: commandIds.documentRenameLayer,
+  name: "Rename layer",
+  execute({ state }, payload) {
+    const name = payload.name.trim();
+    if (!name) return state;
+    return { ...state, document: mapLayerInDocument(state.document, payload.layerId, (layer) => ({ ...layer, name })) };
+  },
+};
+
+export const documentSetLayerClippingMaskCommand: Command<DocumentSetLayerClippingMaskPayload> = {
+  id: commandIds.documentSetLayerClippingMask,
+  name: "Set layer clipping mask",
+  execute({ state }, payload) {
+    if (payload.maskLayerId === payload.layerId) return state;
+
+    if (!payload.maskLayerId) {
+      return {
+        ...state,
+        document: mapLayerInDocument(state.document, payload.layerId, (layer) => {
+          const { clippingMask: _clippingMask, ...rest } = layer;
+          return rest;
+        }),
+      };
+    }
+
+    const targetLocation = findLayerLocation(state.document, payload.layerId);
+    const maskLocation = findLayerLocation(state.document, payload.maskLayerId);
+    if (!targetLocation || !maskLocation) return state;
+    if (targetLocation.artboardId !== maskLocation.artboardId || targetLocation.parentGroupId !== maskLocation.parentGroupId) return state;
+
+    const removed = removeLayerFromDocument(state.document, payload.layerId);
+    if (!removed.layer) return state;
+
+    const maskLocationAfterRemoval = findLayerLocation(removed.document, payload.maskLayerId);
+    if (!maskLocationAfterRemoval) return state;
+
+    return {
+      ...state,
+      document: insertLayer(
+        removed.document,
+        maskLocationAfterRemoval.artboardId,
+        maskLocationAfterRemoval.parentGroupId,
+        { ...removed.layer, clippingMask: { maskLayerId: payload.maskLayerId } },
+        maskLocationAfterRemoval.index + 1,
+      ),
+    };
+  },
+};
+
+export const documentRemoveLayerCommand: Command<DocumentRemoveLayerPayload> = {
+  id: commandIds.documentRemoveLayer,
+  name: "Remove layer",
+  execute({ state }, payload) {
+    const removed = removeLayerFromDocument(state.document, payload.layerId);
+    if (!removed.layer) return state;
+
+    return {
+      ...state,
+      document: removed.document,
+      editor: { ...state.editor, selection: { ...state.editor.selection, layerIds: state.editor.selection.layerIds.filter((id) => id !== payload.layerId) } },
     };
   },
 };
@@ -99,6 +383,171 @@ export const documentAddImageLayerCommand: Command<DocumentAddImageLayerPayload>
 export const documentCommands = [
   documentAddArtboardCommand,
   documentSetArtboardBoundsCommand,
+  documentRemoveArtboardCommand,
+  documentSetArtboardVisibleCommand,
+  documentSetArtboardLockedCommand,
+  documentRenameArtboardCommand,
   documentAddAssetCommand,
   documentAddImageLayerCommand,
+  documentAddGroupLayerCommand,
+  documentMoveLayerCommand,
+  documentGroupLayersCommand,
+  documentUngroupLayerCommand,
+  documentRemoveLayerCommand,
+  documentSetLayerVisibleCommand,
+  documentSetLayerLockedCommand,
+  documentRenameLayerCommand,
+  documentSetLayerClippingMaskCommand,
 ] satisfies Command<unknown>[];
+
+type LayerLocation = {
+  artboardId: ArtboardId;
+  parentGroupId?: LayerId;
+  index: number;
+  layer: Layer;
+};
+
+function findLayerLocation(document: ImageDocument, layerId: LayerId): LayerLocation | undefined {
+  for (const artboard of document.artboards) {
+    const location = findLayerLocationInTree(artboard.layers, layerId, artboard.id);
+    if (location) return location;
+  }
+  return undefined;
+}
+
+function findLayerLocationInTree(layers: Layer[], layerId: LayerId, artboardId: ArtboardId, parentGroupId?: LayerId): LayerLocation | undefined {
+  for (let index = 0; index < layers.length; index++) {
+    const layer = layers[index];
+    if (!layer) continue;
+    if (layer.id === layerId) return { artboardId, parentGroupId, index, layer };
+    if (layer.type === "group") {
+      const child = findLayerLocationInTree(layer.children, layerId, artboardId, layer.id);
+      if (child) return child;
+    }
+  }
+  return undefined;
+}
+
+function mapLayerInDocument(document: ImageDocument, layerId: LayerId, mapLayer: (layer: Layer) => Layer): ImageDocument {
+  return {
+    ...document,
+    artboards: document.artboards.map((artboard) => ({ ...artboard, layers: mapLayerInTree(artboard.layers, layerId, mapLayer) })),
+  };
+}
+
+function mapLayerInTree(layers: Layer[], layerId: LayerId, mapLayer: (layer: Layer) => Layer): Layer[] {
+  return layers.map((layer) => {
+    if (layer.id === layerId) return mapLayer(layer);
+    if (layer.type === "group") return { ...layer, children: mapLayerInTree(layer.children, layerId, mapLayer) };
+    return layer;
+  });
+}
+
+function insertLayer(document: ImageDocument, artboardId: ArtboardId, parentGroupId: LayerId | undefined, layer: Layer, index?: number): ImageDocument {
+  return {
+    ...document,
+    artboards: document.artboards.map((artboard) => {
+      if (artboard.id !== artboardId) return artboard;
+      if (!parentGroupId) return { ...artboard, layers: insertAt(artboard.layers, layer, index) };
+      return { ...artboard, layers: insertLayerInGroup(artboard.layers, parentGroupId, layer, index) };
+    }),
+  };
+}
+
+function insertLayerInGroup(layers: Layer[], groupId: LayerId, layer: Layer, index?: number): Layer[] {
+  return layers.map((candidate) => {
+    if (candidate.type === "group" && candidate.id === groupId) return { ...candidate, children: insertAt(candidate.children, layer, index) };
+    if (candidate.type === "group") return { ...candidate, children: insertLayerInGroup(candidate.children, groupId, layer, index) };
+    return candidate;
+  });
+}
+
+function removeLayerFromDocument(document: ImageDocument, layerId: LayerId): { document: ImageDocument; layer?: Layer } {
+  let removed: Layer | undefined;
+  return {
+    document: {
+      ...document,
+      artboards: document.artboards.map((artboard) => {
+        const result = removeLayerFromTree(artboard.layers, layerId);
+        if (result.layer) removed = result.layer;
+        return { ...artboard, layers: result.layers };
+      }),
+    },
+    layer: removed,
+  };
+}
+
+function removeLayerFromTree(layers: Layer[], layerId: LayerId): { layers: Layer[]; layer?: Layer } {
+  let removed: Layer | undefined;
+  const next: Layer[] = [];
+  for (const layer of layers) {
+    if (layer.id === layerId) {
+      removed = layer;
+      continue;
+    }
+    if (layer.type === "group") {
+      const result = removeLayerFromTree(layer.children, layerId);
+      if (result.layer) removed = result.layer;
+      next.push({ ...layer, children: result.layers });
+    } else {
+      next.push(layer);
+    }
+  }
+  return { layers: next, layer: removed };
+}
+
+function ungroupLayerInDocument(document: ImageDocument, groupId: LayerId): { document: ImageDocument; changed: boolean; artboardId?: ArtboardId; children: Layer[] } {
+  let changed = false;
+  let artboardId: ArtboardId | undefined;
+  let children: Layer[] = [];
+  const next = {
+    ...document,
+    artboards: document.artboards.map((artboard) => {
+      const result = ungroupLayerInTree(artboard.layers, groupId);
+      if (result.changed) {
+        changed = true;
+        artboardId = artboard.id;
+        children = result.children;
+      }
+      return { ...artboard, layers: result.layers };
+    }),
+  };
+  return { document: next, changed, artboardId, children };
+}
+
+function ungroupLayerInTree(layers: Layer[], groupId: LayerId): { layers: Layer[]; changed: boolean; children: Layer[] } {
+  const next: Layer[] = [];
+  for (const layer of layers) {
+    if (layer.type === "group" && layer.id === groupId) return { layers: [...next, ...layer.children, ...layers.slice(next.length + 1)], changed: true, children: layer.children };
+    if (layer.type === "group") {
+      const result = ungroupLayerInTree(layer.children, groupId);
+      if (result.changed) return { layers: [...next, { ...layer, children: result.layers }, ...layers.slice(next.length + 1)], changed: true, children: result.children };
+    }
+    next.push(layer);
+  }
+  return { layers, changed: false, children: [] };
+}
+
+function insertAt(layers: Layer[], layer: Layer, index = layers.length) {
+  const clamped = Math.max(0, Math.min(index, layers.length));
+  return [...layers.slice(0, clamped), layer, ...layers.slice(clamped)];
+}
+
+function findGroup(document: ImageDocument, groupId: LayerId): LayerGroup | undefined {
+  for (const artboard of document.artboards) {
+    const group = findGroupInTree(artboard.layers, groupId);
+    if (group) return group;
+  }
+  return undefined;
+}
+
+function findGroupInTree(layers: Layer[], groupId: LayerId): LayerGroup | undefined {
+  for (const layer of layers) {
+    if (layer.type === "group" && layer.id === groupId) return layer;
+    if (layer.type === "group") {
+      const child = findGroupInTree(layer.children, groupId);
+      if (child) return child;
+    }
+  }
+  return undefined;
+}

commands/ids.ts

@@ -1,8 +1,21 @@
 export const commandIds = {
   documentAddArtboard: "document.addArtboard",
   documentSetArtboardBounds: "document.setArtboardBounds",
+  documentRemoveArtboard: "document.removeArtboard",
+  documentSetArtboardVisible: "document.setArtboardVisible",
+  documentSetArtboardLocked: "document.setArtboardLocked",
+  documentRenameArtboard: "document.renameArtboard",
   documentAddAsset: "document.addAsset",
   documentAddImageLayer: "document.addImageLayer",
+  documentAddGroupLayer: "document.addGroupLayer",
+  documentMoveLayer: "document.moveLayer",
+  documentGroupLayers: "document.groupLayers",
+  documentUngroupLayer: "document.ungroupLayer",
+  documentRemoveLayer: "document.removeLayer",
+  documentSetLayerVisible: "document.setLayerVisible",
+  documentSetLayerLocked: "document.setLayerLocked",
+  documentRenameLayer: "document.renameLayer",
+  documentSetLayerClippingMask: "document.setLayerClippingMask",
   selectionSet: "selection.set",
   selectionClear: "selection.clear",
   selectionAddLayer: "selection.addLayer",
@@ -11,6 +24,7 @@ export const commandIds = {
   toolExitTemporaryPan: "tool.exitTemporaryPan",
   transformBegin: "transform.begin",
   transformUpdate: "transform.update",
+  transformSetBounds: "transform.setBounds",
   transformEnd: "transform.end",
   viewportPan: "viewport.pan",
   viewportSetZoom: "viewport.setZoom",

commands/index.ts

@@ -2,15 +2,41 @@ export type { Command, CommandContext } from "./command";
 export {
   documentAddArtboardCommand,
   documentAddAssetCommand,
+  documentAddGroupLayerCommand,
   documentAddImageLayerCommand,
   documentCommands,
+  documentGroupLayersCommand,
+  documentMoveLayerCommand,
+  documentRemoveArtboardCommand,
+  documentRemoveLayerCommand,
+  documentRenameArtboardCommand,
+  documentRenameLayerCommand,
   documentSetArtboardBoundsCommand,
+  documentSetArtboardLockedCommand,
+  documentSetArtboardVisibleCommand,
+  documentSetLayerClippingMaskCommand,
+  documentSetLayerLockedCommand,
+  documentSetLayerVisibleCommand,
+  documentUngroupLayerCommand,
 } from "./document";
 export type {
   DocumentAddArtboardPayload,
   DocumentAddAssetPayload,
+  DocumentAddGroupLayerPayload,
   DocumentAddImageLayerPayload,
+  DocumentGroupLayersPayload,
+  DocumentMoveLayerPayload,
+  DocumentRemoveArtboardPayload,
+  DocumentRemoveLayerPayload,
+  DocumentRenameArtboardPayload,
+  DocumentRenameLayerPayload,
   DocumentSetArtboardBoundsPayload,
+  DocumentSetArtboardLockedPayload,
+  DocumentSetArtboardVisiblePayload,
+  DocumentSetLayerClippingMaskPayload,
+  DocumentSetLayerLockedPayload,
+  DocumentSetLayerVisiblePayload,
+  DocumentUngroupLayerPayload,
 } from "./document";
 export type { CommandDispatcher, Dispatch } from "./dispatcher";
 export type { CommandId, CommandPayloads } from "./payloads";
@@ -20,8 +46,8 @@ export { createCommandRegistry } from "./registry";
 export { selectionAddLayerCommand, selectionClearCommand, selectionCommands, selectionSetCommand } from "./selection";
 export type { SelectionAddLayerPayload, SelectionSetPayload } from "./selection";
 export { toolCommands, toolEnterTemporaryPanCommand, toolExitTemporaryPanCommand, toolSetActiveCommand } from "./tool";
-export { transformBeginCommand, transformCommands, transformEndCommand, transformUpdateCommand } from "./transform";
+export { transformBeginCommand, transformCommands, transformEndCommand, transformSetBoundsCommand, transformUpdateCommand } from "./transform";
-export type { TransformBeginPayload, TransformUpdatePayload } from "./transform";
+export type { TransformBeginPayload, TransformSetBoundsPayload, TransformUpdatePayload } from "./transform";
 export type { ToolSetActivePayload } from "./tool";
 export {
   viewportCommands,

commands/payloads.ts

@@ -2,12 +2,25 @@ import { commandIds } from "./ids";
 import type {
   DocumentAddArtboardPayload,
   DocumentAddAssetPayload,
+  DocumentAddGroupLayerPayload,
   DocumentAddImageLayerPayload,
+  DocumentGroupLayersPayload,
+  DocumentMoveLayerPayload,
+  DocumentRemoveArtboardPayload,
+  DocumentRemoveLayerPayload,
+  DocumentRenameArtboardPayload,
+  DocumentRenameLayerPayload,
   DocumentSetArtboardBoundsPayload,
+  DocumentSetArtboardLockedPayload,
+  DocumentSetArtboardVisiblePayload,
+  DocumentSetLayerClippingMaskPayload,
+  DocumentSetLayerLockedPayload,
+  DocumentSetLayerVisiblePayload,
+  DocumentUngroupLayerPayload,
 } from "./document";
 import type { SelectionAddLayerPayload, SelectionSetPayload } from "./selection";
 import type { ToolSetActivePayload } from "./tool";
-import type { TransformBeginPayload, TransformUpdatePayload } from "./transform";
+import type { TransformBeginPayload, TransformSetBoundsPayload, TransformUpdatePayload } from "./transform";
 import type {
   ViewportFitArtboardPayload,
   ViewportPanPayload,
@@ -19,8 +32,21 @@ import type {
 export type CommandPayloads = {
   [commandIds.documentAddArtboard]: DocumentAddArtboardPayload;
   [commandIds.documentSetArtboardBounds]: DocumentSetArtboardBoundsPayload;
+  [commandIds.documentRemoveArtboard]: DocumentRemoveArtboardPayload;
+  [commandIds.documentSetArtboardVisible]: DocumentSetArtboardVisiblePayload;
+  [commandIds.documentSetArtboardLocked]: DocumentSetArtboardLockedPayload;
+  [commandIds.documentRenameArtboard]: DocumentRenameArtboardPayload;
   [commandIds.documentAddAsset]: DocumentAddAssetPayload;
   [commandIds.documentAddImageLayer]: DocumentAddImageLayerPayload;
+  [commandIds.documentAddGroupLayer]: DocumentAddGroupLayerPayload;
+  [commandIds.documentMoveLayer]: DocumentMoveLayerPayload;
+  [commandIds.documentGroupLayers]: DocumentGroupLayersPayload;
+  [commandIds.documentUngroupLayer]: DocumentUngroupLayerPayload;
+  [commandIds.documentRemoveLayer]: DocumentRemoveLayerPayload;
+  [commandIds.documentSetLayerVisible]: DocumentSetLayerVisiblePayload;
+  [commandIds.documentSetLayerLocked]: DocumentSetLayerLockedPayload;
+  [commandIds.documentRenameLayer]: DocumentRenameLayerPayload;
+  [commandIds.documentSetLayerClippingMask]: DocumentSetLayerClippingMaskPayload;
   [commandIds.selectionSet]: SelectionSetPayload;
   [commandIds.selectionClear]: void;
   [commandIds.selectionAddLayer]: SelectionAddLayerPayload;
@@ -29,6 +55,7 @@ export type CommandPayloads = {
   [commandIds.toolExitTemporaryPan]: void;
   [commandIds.transformBegin]: TransformBeginPayload;
   [commandIds.transformUpdate]: TransformUpdatePayload;
+  [commandIds.transformSetBounds]: TransformSetBoundsPayload;
   [commandIds.transformEnd]: void;
   [commandIds.viewportPan]: ViewportPanPayload;
   [commandIds.viewportSetZoom]: ViewportSetZoomPayload;

commands/transform.test.ts

@@ -1,7 +1,7 @@
 import { describe, expect, test } from "bun:test";
 import { createInitialAppState } from "@editor/initial-state";
 import { documentAddArtboardCommand } from "./document";
-import { transformBeginCommand, transformEndCommand, transformUpdateCommand } from "./transform";
+import { transformBeginCommand, transformEndCommand, transformSetBoundsCommand, transformUpdateCommand } from "./transform";
 
 function artboardState() {
   return documentAddArtboardCommand.execute(
@@ -61,6 +61,24 @@ describe("transform commands", () => {
     expect(updated.document.artboards[0]?.bounds).toEqual({ x: -50, y: -40, w: 150, h: 120 });
   });
 
+  test("sets transform target bounds directly", () => {
+    const updated = transformSetBoundsCommand.execute(
+      { state: artboardState() },
+      { target: { type: "artboard", id: "a1" }, bounds: { x: 10, y: 20, w: 300, h: 200 } },
+    );
+
+    expect(updated.document.artboards[0]?.bounds).toEqual({ x: 10, y: 20, w: 300, h: 200 });
+  });
+
+  test("direct bounds edits enforce minimum size", () => {
+    const updated = transformSetBoundsCommand.execute(
+      { state: artboardState() },
+      { target: { type: "artboard", id: "a1" }, bounds: { x: 10, y: 20, w: -5, h: 0 } },
+    );
+
+    expect(updated.document.artboards[0]?.bounds).toEqual({ x: 4, y: 19, w: 1, h: 1 });
+  });
+
   test("ends transform session", () => {
     const started = transformBeginCommand.execute(
       { state: artboardState() },

commands/transform.ts

@@ -16,6 +16,11 @@ export type TransformUpdatePayload = {
   shiftKey?: boolean;
 };
 
+export type TransformSetBoundsPayload = {
+  target: TransformTarget;
+  bounds: Rect;
+};
+
 export const transformBeginCommand: Command<TransformBeginPayload> = {
   id: commandIds.transformBegin,
   name: "Begin transform",
@@ -59,6 +64,17 @@ export const transformUpdateCommand: Command<TransformUpdatePayload> = {
   },
 };
 
+export const transformSetBoundsCommand: Command<TransformSetBoundsPayload> = {
+  id: commandIds.transformSetBounds,
+  name: "Set transform bounds",
+  execute({ state }, payload) {
+    return {
+      ...state,
+      document: applyTransformTargetBounds(state.document, payload.target, normalizeRect(payload.bounds)),
+    };
+  },
+};
+
 export const transformEndCommand: Command = {
   id: commandIds.transformEnd,
   name: "End transform",
@@ -75,7 +91,7 @@ export const transformEndCommand: Command = {
   },
 };
 
-export const transformCommands = [transformBeginCommand, transformUpdateCommand, transformEndCommand] satisfies Command<unknown>[];
+export const transformCommands = [transformBeginCommand, transformUpdateCommand, transformSetBoundsCommand, transformEndCommand] satisfies Command<unknown>[];
 
 function transformBounds(bounds: Rect, handle: TransformHandle, delta: Vec2D, constrained = false): Rect {
   if (handle === "body") {

commands/viewport.test.ts

@@ -40,7 +40,7 @@ describe("viewport commands", () => {
       ...viewportSetSizeCommand.execute(context(), { w: 1000, h: 800 }),
       document: {
         ...context().state.document,
-        artboards: [{ id: "artboard-1", name: "Artboard", bounds: { x: -400, y: -300, w: 800, h: 600 }, backgroundColor: "transparent", layers: [] }],
+        artboards: [{ id: "artboard-1", name: "Artboard", bounds: { x: -400, y: -300, w: 800, h: 600 }, backgroundColor: "transparent", visible: true, locked: false, layers: [] }],
       },
     };
 
@@ -55,7 +55,7 @@ describe("viewport commands", () => {
       ...context().state,
       document: {
         ...context().state.document,
-        artboards: [{ id: "artboard-1", name: "Artboard", bounds: { x: 10, y: 20, w: 100, h: 200 }, backgroundColor: "transparent", layers: [] }],
+        artboards: [{ id: "artboard-1", name: "Artboard", bounds: { x: 10, y: 20, w: 100, h: 200 }, backgroundColor: "transparent", visible: true, locked: false, layers: [] }],
       },
     };
 

core/artboard.ts

@@ -7,5 +7,7 @@ export type Artboard = {
   name: string;
   bounds: Rect;
   backgroundColor: string;
+  visible: boolean;
+  locked: boolean;
   layers: Layer[];
 };

editor/transform-targets.test.ts

@@ -13,6 +13,8 @@ const document: ImageDocument = {
       name: "Artboard",
       bounds: { x: 0, y: 0, w: 100, h: 80 },
       backgroundColor: "transparent",
+      visible: true,
+      locked: false,
       layers: [
         {
           id: "l1",

input/index.ts

@@ -5,6 +5,8 @@ export {
 } from "./dom";
 export type { CommandKeybind, GlobalKeybindConsumer, Keybind, KeybindEvent, KeybindMap } from "./keyboard";
 export { handleKeybind, keybindFromEvent } from "./keyboard";
+export { findGroup, findLayerInfoInDocument, handleDeleteSelectionKey, resolveLayerDrop } from "./layers-panel";
+export type { LayerDropTarget, LayerInfo } from "./layers-panel";
 export { handleArtboardSelection } from "./selection";
 export { createTransformControlsInputController, hitTestArtboardTransformHandle } from "./transform-controls";
 export type { TransformControlsInputController } from "./transform-controls";

input/layers-panel.test.ts

@@ -0,0 +1,89 @@
+import { describe, expect, test } from "bun:test";
+import { commandIds } from "@commands/ids";
+import type { ImageDocument } from "@core/document";
+import type { Layer } from "@core/layer";
+import { handleDeleteSelectionKey, resolveLayerDrop } from "./layers-panel";
+
+const document: ImageDocument = {
+  id: "doc",
+  name: "Doc",
+  version: 1,
+  assets: [],
+  artboards: [
+    {
+      id: "a1",
+      name: "Artboard",
+      bounds: { x: 0, y: 0, w: 100, h: 100 },
+      backgroundColor: "transparent",
+      visible: true,
+      locked: false,
+      layers: [group("a"), group("b"), { ...group("g"), children: [group("c")] }],
+    },
+  ],
+};
+
+describe("layers panel input", () => {
+  test("resolves dropping a layer before another layer", () => {
+    expect(resolveLayerDrop({ document, sourceLayerId: "b", target: { artboardId: "a1", layer: group("a") }, verticalRatio: 0.1 })).toEqual({
+      layerId: "b",
+      toArtboardId: "a1",
+      toParentGroupId: undefined,
+      toIndex: 0,
+    });
+  });
+
+  test("resolves dropping a layer into a group", () => {
+    expect(resolveLayerDrop({ document, sourceLayerId: "a", target: { artboardId: "a1", layer: { ...group("g"), children: [group("c")] } }, verticalRatio: 0.5 })).toEqual({
+      layerId: "a",
+      toArtboardId: "a1",
+      toParentGroupId: "g",
+      toIndex: 1,
+    });
+  });
+
+  test("dispatches delete commands for selected layers", () => {
+    const dispatched: unknown[] = [];
+    const consumed = handleDeleteSelectionKey({
+      event: { key: "Backspace", code: "Backspace", altKey: false, ctrlKey: false, metaKey: false, shiftKey: false },
+      selection: { artboardId: "a1", layerIds: ["a", "b"] },
+      dispatch: (commandId, payload) => {
+        dispatched.push({ commandId, payload });
+        return undefined as never;
+      },
+    });
+
+    expect(consumed).toBe(true);
+    expect(dispatched).toEqual([
+      { commandId: commandIds.documentRemoveLayer, payload: { layerId: "a" } },
+      { commandId: commandIds.documentRemoveLayer, payload: { layerId: "b" } },
+    ]);
+  });
+
+  test("dispatches delete command for selected artboard when no layers are selected", () => {
+    const dispatched: unknown[] = [];
+    const consumed = handleDeleteSelectionKey({
+      event: { key: "Delete", code: "Delete", altKey: false, ctrlKey: false, metaKey: false, shiftKey: false },
+      selection: { artboardId: "a1", layerIds: [] },
+      dispatch: (commandId, payload) => {
+        dispatched.push({ commandId, payload });
+        return undefined as never;
+      },
+    });
+
+    expect(consumed).toBe(true);
+    expect(dispatched).toEqual([{ commandId: commandIds.documentRemoveArtboard, payload: { id: "a1" } }]);
+  });
+});
+
+function group(id: string): Extract<Layer, { type: "group" }> {
+  return {
+    id,
+    type: "group",
+    name: id,
+    visible: true,
+    locked: false,
+    opacity: 1,
+    transform: { position: { x: 0, y: 0 }, scale: { x: 1, y: 1 }, rotation: 0 },
+    children: [],
+  };
+}

input/layers-panel.ts

@@ -0,0 +1,95 @@
+import { commandIds } from "@commands/ids";
+import type { Dispatch } from "@commands/dispatcher";
+import type { ImageDocument } from "@core/document";
+import type { ArtboardId, LayerId } from "@core/id";
+import type { Layer } from "@core/layer";
+import type { SelectionState } from "@editor/state";
+import type { KeybindEvent } from "./keyboard";
+
+export type LayerInfo = {
+  artboardId: ArtboardId;
+  parentGroupId?: LayerId;
+  layer: Layer;
+};
+
+export type LayerDropTarget = {
+  artboardId: ArtboardId;
+  layer: Layer;
+};
+
+export function handleDeleteSelectionKey(options: { event: KeybindEvent; selection: SelectionState; dispatch: Dispatch }): boolean {
+  if (options.event.altKey || options.event.ctrlKey || options.event.metaKey) return false;
+  if (options.event.key !== "Backspace" && options.event.key !== "Delete") return false;
+
+  for (const layerId of options.selection.layerIds) options.dispatch(commandIds.documentRemoveLayer, { layerId });
+  if (options.selection.layerIds.length === 0 && options.selection.artboardId) {
+    options.dispatch(commandIds.documentRemoveArtboard, { id: options.selection.artboardId });
+  }
+  return true;
+}
+
+export function resolveLayerDrop(options: {
+  document: ImageDocument;
+  sourceLayerId: LayerId;
+  target: LayerDropTarget;
+  verticalRatio: number;
+}): { layerId: LayerId; toArtboardId: ArtboardId; toParentGroupId?: LayerId; toIndex: number } | undefined {
+  const targetInfo = findLayerInfoInDocument(options.document, options.target.layer.id);
+  const sourceInfo = findLayerInfoInDocument(options.document, options.sourceLayerId);
+  if (!targetInfo || !sourceInfo || options.sourceLayerId === options.target.layer.id) return undefined;
+
+  const verticalRatio = Math.max(0, Math.min(1, options.verticalRatio));
+  const dropIntoGroup = options.target.layer.type === "group" && verticalRatio >= 0.33 && verticalRatio <= 0.66;
+  if (dropIntoGroup) {
+    return {
+      layerId: options.sourceLayerId,
+      toArtboardId: options.target.artboardId,
+      toParentGroupId: options.target.layer.id,
+      toIndex: options.target.layer.children.length,
+    };
+  }
+
+  const siblings = targetInfo.parentGroupId
+    ? findGroup(options.document, targetInfo.parentGroupId)?.children
+    : options.document.artboards.find((artboard) => artboard.id === targetInfo.artboardId)?.layers;
+  if (!siblings) return undefined;
+
+  const targetIndex = siblings.findIndex((layer) => layer.id === options.target.layer.id);
+  const sourceIndex = sourceInfo.parentGroupId === targetInfo.parentGroupId && sourceInfo.artboardId === targetInfo.artboardId
+    ? siblings.findIndex((layer) => layer.id === options.sourceLayerId)
+    : -1;
+  const rawIndex = verticalRatio < 0.5 ? targetIndex : targetIndex + 1;
+  const adjustedIndex = sourceIndex >= 0 && sourceIndex < rawIndex ? rawIndex - 1 : rawIndex;
+
+  return {
+    layerId: options.sourceLayerId,
+    toArtboardId: targetInfo.artboardId,
+    toParentGroupId: targetInfo.parentGroupId,
+    toIndex: adjustedIndex,
+  };
+}
+
+export function findLayerInfoInDocument(document: ImageDocument, layerId?: LayerId): LayerInfo | undefined {
+  if (!layerId) return undefined;
+  for (const artboard of document.artboards) {
+    const found = findLayerInfo(artboard.layers, layerId, artboard.id);
+    if (found) return found;
+  }
+  return undefined;
+}
+
+export function findGroup(document: ImageDocument, groupId: LayerId): Extract<Layer, { type: "group" }> | undefined {
+  const info = findLayerInfoInDocument(document, groupId);
+  return info?.layer.type === "group" ? info.layer : undefined;
+}
+
+function findLayerInfo(layers: Layer[], layerId: LayerId, artboardId: ArtboardId, parentGroupId?: LayerId): LayerInfo | undefined {
+  for (const layer of layers) {
+    if (layer.id === layerId) return { artboardId, parentGroupId, layer };
+    if (layer.type === "group") {
+      const found = findLayerInfo(layer.children, layerId, artboardId, layer.id);
+      if (found) return found;
+    }
+  }
+  return undefined;
+}

input/selection.test.ts

@@ -12,7 +12,7 @@ describe("selection input", () => {
       ...createInitialAppState("Test"),
       document: {
         ...createInitialAppState("Test").document,
-        artboards: [{ id: "a1", name: "Artboard", bounds: { x: -50, y: -50, w: 100, h: 100 }, backgroundColor: "transparent", layers: [] }],
+        artboards: [{ id: "a1", name: "Artboard", bounds: { x: -50, y: -50, w: 100, h: 100 }, backgroundColor: "transparent", visible: true, locked: false, layers: [] }],
       },
       editor: {
         ...createInitialAppState("Test").editor,
@@ -47,6 +47,8 @@ describe("selection input", () => {
             name: "Artboard",
             bounds: { x: -100, y: -100, w: 200, h: 200 },
             backgroundColor: "transparent",
+            visible: true,
+            locked: false,
             layers: [
               {
                 id: "l1",

input/selection.ts

@@ -22,6 +22,7 @@ export function handleArtboardSelection(options: {
   }
 
   const artboard = [...options.document.artboards].reverse().find((candidate) => {
+    if (!candidate.visible || candidate.locked) return false;
     const bounds = candidate.bounds;
     return point.x >= bounds.x && point.x <= bounds.x + bounds.w && point.y >= bounds.y && point.y <= bounds.y + bounds.h;
   });
@@ -37,6 +38,7 @@ export function handleArtboardSelection(options: {
 
 function findTopmostLayerAtPoint(document: ImageDocument, point: { x: number; y: number }) {
   for (const artboard of [...document.artboards].reverse()) {
+    if (!artboard.visible || artboard.locked) continue;
     const layerId = findTopmostLayerInTreeAtPoint(document, [...artboard.layers].reverse(), point);
     if (layerId) return { artboardId: artboard.id, layerId };
   }
@@ -46,6 +48,7 @@ function findTopmostLayerAtPoint(document: ImageDocument, point: { x: number; y:
 
 function findTopmostLayerInTreeAtPoint(document: ImageDocument, layers: Layer[], point: { x: number; y: number }): string | undefined {
   for (const layer of layers) {
+    if (!layer.visible || layer.locked) continue;
     if (layer.type === "group") {
       const childId = findTopmostLayerInTreeAtPoint(document, [...layer.children].reverse(), point);
       if (childId) return childId;

input/transform-controls.test.ts

@@ -16,12 +16,40 @@ describe("transform controls input", () => {
     expect(hitTestArtboardTransformHandle({ x: 10, y: 10 }, bounds, viewport)).toBeUndefined();
   });
 
+  test("does not transform while temporary pan is active", () => {
+    const state = {
+      ...createInitialAppState("Test"),
+      document: {
+        ...createInitialAppState("Test").document,
+        artboards: [{ id: "a1", name: "Artboard", bounds: { x: -50, y: -50, w: 100, h: 100 }, backgroundColor: "transparent", visible: true, locked: false, layers: [] }],
+      },
+      editor: {
+        ...createInitialAppState("Test").editor,
+        viewport: { center: { x: 0, y: 0 }, zoom: 1, rotation: 0, size: { w: 200, h: 200 } },
+        selection: { artboardId: "a1", layerIds: [] },
+        tools: { activeTool: "select" as const, interactionMode: { type: "temporary-pan" as const, previousTool: "select" as const } },
+      },
+    };
+    const dispatched: unknown[] = [];
+    const controller = createTransformControlsInputController({
+      getDocument: () => state.document,
+      getEditor: () => state.editor,
+      dispatch: (commandId, payload) => {
+        dispatched.push({ commandId, payload });
+        return ignoredState;
+      },
+    });
+
+    expect(controller.pointerDown(pointerEvent({ position: { x: 100, y: 100 }, buttons: 1 }))).toBe(false);
+    expect(dispatched).toEqual([]);
+  });
+
   test("dispatches transform lifecycle for selected artboard", () => {
     let state = {
       ...createInitialAppState("Test"),
       document: {
         ...createInitialAppState("Test").document,
-        artboards: [{ id: "a1", name: "Artboard", bounds: { x: -50, y: -50, w: 100, h: 100 }, backgroundColor: "transparent", layers: [] }],
+        artboards: [{ id: "a1", name: "Artboard", bounds: { x: -50, y: -50, w: 100, h: 100 }, backgroundColor: "transparent", visible: true, locked: false, layers: [] }],
       },
       editor: {
         ...createInitialAppState("Test").editor,

input/transform-controls.ts

@@ -3,8 +3,10 @@ import type { Dispatch } from "@commands/dispatcher";
 import type { ImageDocument } from "@core/document";
 import type { Rect, Vec2D } from "@core/geometry";
 import type { EditorState } from "@editor/state";
+import { isPanInteractionMode } from "@editor/tools";
 import { resolveTransformTargetBounds, selectedTransformTarget } from "@editor/transform-targets";
 import type { TransformHandle } from "@editor/transform";
+import { findLayerInfoInDocument } from "./layers-panel";
 import type { PointerInputEvent } from "./pointer";
 
 export type TransformControlsInputController = {
@@ -23,11 +25,11 @@ export function createTransformControlsInputController(options: {
       if (event.pointerType !== "mouse" || (event.buttons & 1) !== 1) return false;
 
       const editor = options.getEditor();
-      if (editor.tools.activeTool !== "select") return false;
+      if (editor.tools.activeTool !== "select" || isPanInteractionMode(editor.tools.interactionMode)) return false;
 
       const document = options.getDocument();
       const target = selectedTransformTarget(document, editor.selection);
-      if (!target) return false;
+      if (!target || isTransformTargetLocked(document, target)) return false;
 
       const bounds = resolveTransformTargetBounds(document, target);
       if (!bounds) return false;
@@ -45,7 +47,7 @@ export function createTransformControlsInputController(options: {
     },
     pointerMove(event) {
       const editor = options.getEditor();
-      if (!editor.transformSession) return false;
+      if (!editor.transformSession || isPanInteractionMode(editor.tools.interactionMode)) return false;
 
       options.dispatch(commandIds.transformUpdate, { point: viewportPointToDocumentPoint(event.position, editor.viewport), shiftKey: event.shiftKey });
       return true;
@@ -68,6 +70,15 @@ export function hitTestArtboardTransformHandle(position: Vec2D, bounds: Rect, vi
   return undefined;
 }
 
+function isTransformTargetLocked(document: ImageDocument, target: { type: "artboard" | "layer"; id: string }) {
+  if (target.type === "artboard") {
+    const artboard = document.artboards.find((candidate) => candidate.id === target.id);
+    return !artboard || !artboard.visible || artboard.locked;
+  }
+  const layer = findLayerInfoInDocument(document, target.id)?.layer;
+  return !layer || !layer.visible || layer.locked;
+}
+
 function transformHandleRects(rect: Rect): { handle: TransformHandle; rect: Rect }[] {
   const size = 12;
   const half = size / 2;

renderer/layers.ts

@@ -12,6 +12,7 @@ const imageLayerInsetColor: RgbaColor = [0.48, 0.54, 0.64, 1];
 
 export function renderLayers(context: WebGlRendererContext, document: ImageDocument, viewport: ViewportState, imageTextureRenderer: ImageTextureRenderer) {
   for (const artboard of document.artboards) {
+    if (!artboard.visible) continue;
     const clipRect = documentRectToScreenRect(context.canvas, artboard.bounds, viewport);
     for (const layer of artboard.layers) renderLayer(context, document, viewport, layer, imageTextureRenderer, clipRect);
   }

renderer/renderer.ts

@@ -56,7 +56,7 @@ export function createRenderer(canvas: HTMLCanvasElement, backend: RendererBacke
       context.enable(context.SCISSOR_TEST);
 
       for (const artboard of frame.document.artboards) {
-        renderArtboard(rendererContext, artboard, frame.editor.viewport);
+        if (artboard.visible) renderArtboard(rendererContext, artboard, frame.editor.viewport);
       }
       imageTextureRenderer.syncAssets(frame.document.assets);
       renderLayers(rendererContext, frame.document, frame.editor.viewport, imageTextureRenderer);

view/App.tsx

@@ -1,12 +1,12 @@
-import { useState } from "react";
+import { useEffect, useState } from "react";
 import type { ImageStudioApp } from "@app/app";
 import { BottomControlsIsland } from "./BottomControlsIsland";
 import { CanvasViewport } from "./CanvasViewport";
 import { LayersSheet } from "./LayersSheet";
 import { ToolOverlay } from "./ToolOverlay";
 import { labelForTool } from "./toolLabels";
-import { resolveTransformTargetBounds } from "@editor/transform-targets";
+import { resolveTransformTargetBounds, selectedTransformTarget } from "@editor/transform-targets";
-import { getSelectionSummary } from "./selectionSummary";
+import { handleDeleteSelectionKey, keybindEventFromKeyboardEvent } from "@input/index";
 import { useAppState } from "./useAppState";
 import { useImageImport } from "./useImageImport";
 import { useViewportActivityIsland } from "./useViewportActivityIsland";
@@ -22,10 +22,35 @@ export function App({ app }: AppProps) {
   const viewportActivityIsland = useViewportActivityIsland(state.editor.viewport);
   const imageImport = useImageImport(app.store);
   const [layersOpen, setLayersOpen] = useState(false);
-  const selectionSummary = getSelectionSummary(state.document, state.editor.selection);
+  const transformTarget = state.editor.transformSession?.target ?? selectedTransformTarget(state.document, state.editor.selection);
-  const transformBounds = state.editor.transformSession
+
-    ? resolveTransformTargetBounds(state.document, state.editor.transformSession.target)
+  useEffect(() => {
-    : undefined;
+    const handleKeyDown = (event: KeyboardEvent) => {
+      const target = event.target;
+      const editableTarget =
+        target instanceof HTMLElement &&
+        (target.isContentEditable || target instanceof HTMLInputElement || target instanceof HTMLTextAreaElement || target instanceof HTMLSelectElement);
+
+      if (event.altKey || event.ctrlKey || event.metaKey || editableTarget) return;
+
+      if (event.key.toLowerCase() === "l") {
+        setLayersOpen(true);
+        event.preventDefault();
+        return;
+      }
+
+      const consumed = handleDeleteSelectionKey({
+        event: keybindEventFromKeyboardEvent(event),
+        selection: app.store.getState().editor.selection,
+        dispatch: app.store.dispatch,
+      });
+      if (consumed) event.preventDefault();
+    };
+
+    window.addEventListener("keydown", handleKeyDown);
+    return () => window.removeEventListener("keydown", handleKeyDown);
+  }, [app.store]);
+  const transformBounds = transformTarget ? resolveTransformTargetBounds(state.document, transformTarget) : undefined;
 
   return (
     <main className="relative h-full overflow-hidden bg-background text-foreground">
@@ -44,16 +69,15 @@ export function App({ app }: AppProps) {
           dispatch={app.store.dispatch}
         />
       </div>
-      <LayersSheet document={state.document} selection={state.editor.selection} open={layersOpen} onClose={() => setLayersOpen(false)} />
+      <LayersSheet document={state.document} selection={state.editor.selection} open={layersOpen} dispatch={app.store.dispatch} onClose={() => setLayersOpen(false)} />
       <div className="absolute inset-x-0 bottom-4 z-10 flex justify-center">
         <BottomControlsIsland
           viewport={state.editor.viewport}
-          visible={Boolean(transformBounds) || selectionSummary.type !== "none" || viewportActivityIsland.visible}
+          visible={Boolean(transformBounds) || viewportActivityIsland.visible}
           action={viewportActivityIsland.action}
-          selection={selectionSummary}
+          transformBounds={viewportActivityIsland.visible ? undefined : transformBounds}
-          transformBounds={transformBounds}
+          transformTarget={viewportActivityIsland.visible ? undefined : transformTarget}
           dispatch={app.store.dispatch}
-          onOpenLayers={() => setLayersOpen(true)}
         />
       </div>
       <CanvasViewport store={app.store} />

view/BottomControlsIsland.tsx

@@ -1,25 +1,22 @@
 import type { AppStore } from "@editor/store";
 import type { ViewportState } from "@editor/state";
 import { PanControls } from "./bottom-controls/PanControls";
-import { SelectionControls } from "./bottom-controls/SelectionControls";
 import { TransformControls } from "./bottom-controls/TransformControls";
 import { ZoomControls } from "./bottom-controls/ZoomControls";
 import type { Rect } from "@core/geometry";
-import type { SelectionSummary } from "./selectionSummary";
+import type { TransformTarget } from "@editor/transform";
-
 export type BottomControlsAction = "pan" | "zoom";
 
 export type BottomControlsIslandProps = {
   viewport: ViewportState;
   visible: boolean;
   action: BottomControlsAction;
-  selection: SelectionSummary;
   transformBounds?: Rect;
+  transformTarget?: TransformTarget;
   dispatch: AppStore["dispatch"];
-  onOpenLayers: () => void;
 };
 
-export function BottomControlsIsland({ viewport, visible, action, selection, transformBounds, dispatch, onOpenLayers }: BottomControlsIslandProps) {
+export function BottomControlsIsland({ viewport, visible, action, transformBounds, transformTarget, dispatch }: BottomControlsIslandProps) {
   const zoomPercent = Math.round(viewport.zoom * 100);
   const x = Math.round(viewport.center.x);
   const y = Math.round(viewport.center.y);
@@ -31,10 +28,8 @@ export function BottomControlsIsland({ viewport, visible, action, selection, tra
         visible ? "pointer-events-auto translate-y-0 opacity-100" : "pointer-events-none translate-y-3 opacity-0"
       }`}
     >
-      {transformBounds ? (
+      {transformBounds && transformTarget ? (
-        <TransformControls bounds={transformBounds} />
+        <TransformControls bounds={transformBounds} target={transformTarget} dispatch={dispatch} />
-      ) : selection.type !== "none" ? (
-        <SelectionControls selection={selection} onOpenLayers={onOpenLayers} />
       ) : action === "pan" ? (
         <PanControls x={x} y={y} />
       ) : (

view/LayersSheet.tsx

@@ -1,40 +1,145 @@
-import { Eye, EyeSlash, Lock, LockOpen, X } from "@phosphor-icons/react";
+import { useRef, useState, type DragEvent, type MutableRefObject } from "react";
+import { DownloadSimple, Eye, EyeSlash, FolderPlus, Lock, LockOpen, Plus, Stack, Trash, X } from "@phosphor-icons/react";
+import { commandIds } from "@commands/ids";
 import type { ImageDocument } from "@core/document";
 import type { Layer } from "@core/layer";
+import type { ArtboardId } from "@core/id";
 import type { SelectionState } from "@editor/state";
+import type { AppStore } from "@editor/store";
+import { findGroup, findLayerInfoInDocument, resolveLayerDrop, type LayerInfo } from "@input/index";
+import { downloadArtboardPng } from "./exportArtboardPng";
 
 export type LayersSheetProps = {
   document: ImageDocument;
   selection: SelectionState;
   open: boolean;
+  dispatch: AppStore["dispatch"];
   onClose: () => void;
 };
 
-export function LayersSheet({ document, selection, open, onClose }: LayersSheetProps) {
+export function LayersSheet({ document, selection, open, dispatch, onClose }: LayersSheetProps) {
+  const selectedArtboardId = selection.artboardId ?? document.artboards[0]?.id;
+  const selectedLayer = findLayerInfoInDocument(document, selection.layerIds[0]);
+  const canGroup = Boolean(selection.artboardId && selection.layerIds.length > 0);
+  const canUngroup = selectedLayer?.layer.type === "group";
+  const draggedLayerId = useRef<string>();
+  const [editingTitle, setEditingTitle] = useState<EditingTitle>();
+
   return (
     <aside
       aria-hidden={!open}
-      className={`pointer-events-auto absolute right-3 top-12 z-20 w-72 rounded-xl border border-white/10 bg-black/75 text-xs text-white shadow-xl backdrop-blur transition-all duration-200 ${
+      className={`pointer-events-auto absolute right-4 top-12 z-20 w-96 overflow-hidden rounded-2xl border border-white/10 bg-zinc-950/85 text-sm text-white shadow-2xl shadow-black/40 backdrop-blur-xl transition-all duration-200 ${
         open ? "translate-x-0 opacity-100" : "pointer-events-none translate-x-4 opacity-0"
       }`}
     >
-      <header className="flex h-10 items-center justify-between border-b border-white/10 px-3">
+      <header className="flex h-14 items-center justify-between border-b border-white/10 bg-white/[0.03] px-4">
-        <span className="font-medium">Layers</span>
+        <div>
+          <div className="font-medium tracking-wide">Layers</div>
+          <div className="text-xs text-white/40">Press L to open</div>
+        </div>
         <button type="button" className={iconButtonClass()} aria-label="Close layers" onClick={onClose}>
-          <X size={16} weight="regular" />
+          <X size={18} weight="regular" />
         </button>
       </header>
-      <div className="max-h-96 overflow-auto p-2">
+      <div className="flex flex-wrap gap-2 border-b border-white/10 bg-black/20 p-3">
-        {document.artboards.map((artboard) => (
+        <button type="button" className={toolbarButtonClass()} onClick={() => addArtboard(document, dispatch)}>
-          <section key={artboard.id} className="mb-2 last:mb-0">
+          <Plus size={16} /> Artboard
-            <div className={`rounded-md px-2 py-1 text-white/60 ${selection.artboardId === artboard.id ? "bg-white/10 text-white" : ""}`}>
+        </button>
-              {artboard.name}
+        <button type="button" className={toolbarButtonClass()} disabled={!selectedArtboardId} onClick={() => selectedArtboardId && addLayer(document, selectedArtboardId, selectedLayer, dispatch)}>
+          <Plus size={16} /> Layer
+        </button>
+        <button type="button" className={toolbarButtonClass()} disabled={!selectedArtboardId} onClick={() => selectedArtboardId && addGroup(selectedArtboardId, dispatch)}>
+          <FolderPlus size={16} /> Group
+        </button>
+        <button type="button" className={toolbarButtonClass()} disabled={!canGroup} onClick={() => selection.artboardId && groupSelection(selection.artboardId, selection.layerIds, dispatch)}>
+          <Stack size={16} /> Group selected
+        </button>
+        <button type="button" className={toolbarButtonClass()} disabled={!canUngroup} onClick={() => selectedLayer && dispatch(commandIds.documentUngroupLayer, { groupId: selectedLayer.layer.id })}>
+          Ungroup
+        </button>
+        <button type="button" className={toolbarButtonClass()} disabled={!selectedLayer} onClick={() => selectedLayer && moveLayer(document, selectedLayer, -1, dispatch)}>
+          Up
+        </button>
+        <button type="button" className={toolbarButtonClass()} disabled={!selectedLayer} onClick={() => selectedLayer && moveLayer(document, selectedLayer, 1, dispatch)}>
+          Down
+        </button>
+        <button type="button" className={toolbarButtonClass()} disabled={!selectedLayer && !selection.artboardId} onClick={() => deleteSelection(selection, selectedLayer, dispatch)}>
+          <Trash size={16} /> Delete
+        </button>
       </div>
-            <div className="mt-1 space-y-1 pl-2">
+      <div className="max-h-[32rem] overflow-auto p-3">
-              {artboard.layers.length === 0 ? (
+        {document.artboards.map((artboard) => (
-                <div className="px-2 py-1 text-white/40">No layers</div>
+          <section key={artboard.id} className="mb-4 last:mb-0">
+            <div
+              className={`flex w-full items-center gap-3 rounded-xl px-3 py-2.5 text-left transition ${selection.artboardId === artboard.id && selection.layerIds.length === 0 ? "bg-sky-400/15 text-sky-100 ring-1 ring-sky-300/20" : "text-white/65 hover:bg-white/[0.06] hover:text-white"}`}
+              onDragOver={(event) => {
+                if (draggedLayerId.current) event.preventDefault();
+              }}
+              onDrop={(event) => {
+                event.preventDefault();
+                if (draggedLayerId.current) dispatch(commandIds.documentMoveLayer, { layerId: draggedLayerId.current, toArtboardId: artboard.id, toIndex: artboard.layers.length });
+                draggedLayerId.current = undefined;
+              }}
+            >
+              <button type="button" className="text-white/55 transition hover:text-white" aria-label={artboard.visible ? "Hide artboard" : "Show artboard"} onClick={() => dispatch(commandIds.documentSetArtboardVisible, { id: artboard.id, visible: !artboard.visible })}>
+                {artboard.visible ? <Eye size={17} weight="regular" /> : <EyeSlash size={17} weight="regular" />}
+              </button>
+              <button type="button" className="text-white/55 transition hover:text-white" aria-label={artboard.locked ? "Unlock artboard" : "Lock artboard"} onClick={() => dispatch(commandIds.documentSetArtboardLocked, { id: artboard.id, locked: !artboard.locked })}>
+                {artboard.locked ? <Lock size={17} weight="regular" /> : <LockOpen size={17} weight="regular" />}
+              </button>
+              {editingTitle?.type === "artboard" && editingTitle.id === artboard.id ? (
+                <RenameInput
+                  value={editingTitle.draft}
+                  onChange={(draft) => setEditingTitle({ ...editingTitle, draft })}
+                  onCancel={() => setEditingTitle(undefined)}
+                  onCommit={() => {
+                    dispatch(commandIds.documentRenameArtboard, { id: artboard.id, name: editingTitle.draft });
+                    setEditingTitle(undefined);
+                  }}
+                />
               ) : (
-                artboard.layers.map((layer) => <LayerRow key={layer.id} layer={layer} depth={0} selectedLayerIds={selection.layerIds} />)
+                <button
+                  type="button"
+                  className="min-w-0 flex-1 truncate text-left font-medium"
+                  onClick={() => dispatch(commandIds.selectionSet, { artboardId: artboard.id, layerIds: [] })}
+                  onDoubleClick={() => setEditingTitle({ type: "artboard", id: artboard.id, draft: artboard.name })}
+                >
+                  {artboard.name}
+                </button>
+              )}
+              <button
+                type="button"
+                className="text-white/55 transition hover:text-white"
+                aria-label={`Export ${artboard.name} as PNG`}
+                title="Export PNG"
+                onClick={(event) => {
+                  event.stopPropagation();
+                  void downloadArtboardPng(artboard, document.assets);
+                }}
+              >
+                <DownloadSimple size={17} weight="regular" />
+              </button>
+              <span className="rounded-full bg-white/10 px-2 py-0.5 text-xs text-white/45">{artboard.layers.length}</span>
+            </div>
+            <div className="mt-2 space-y-1.5 pl-3">
+              {artboard.layers.length === 0 ? (
+                <div className="rounded-xl border border-dashed border-white/10 px-3 py-4 text-center text-white/35">No layers yet</div>
+              ) : (
+                artboard.layers.map((layer) => (
+                  <LayerRow
+                    key={layer.id}
+                    document={document}
+                    artboardId={artboard.id}
+                    layer={layer}
+                    depth={0}
+                    selectedLayerIds={selection.layerIds}
+                    draggedLayerId={draggedLayerId}
+                    editingTitle={editingTitle}
+                    setEditingTitle={setEditingTitle}
+                    selectedMaskLayer={selectedLayer}
+                    dispatch={dispatch}
+                  />
+                ))
               )}
             </div>
           </section>
@@ -44,20 +149,256 @@ export function LayersSheet({ document, selection, open, onClose }: LayersSheetP
   );
 }
 
-function LayerRow({ layer, depth, selectedLayerIds }: { layer: Layer; depth: number; selectedLayerIds: string[] }) {
+function LayerRow({
+  document,
+  artboardId,
+  layer,
+  depth,
+  selectedLayerIds,
+  draggedLayerId,
+  editingTitle,
+  setEditingTitle,
+  selectedMaskLayer,
+  dispatch,
+}: {
+  document: ImageDocument;
+  artboardId: ArtboardId;
+  layer: Layer;
+  depth: number;
+  selectedLayerIds: string[];
+  draggedLayerId: MutableRefObject<string | undefined>;
+  editingTitle: EditingTitle | undefined;
+  setEditingTitle: (editingTitle: EditingTitle | undefined) => void;
+  selectedMaskLayer?: LayerInfo;
+  dispatch: AppStore["dispatch"];
+}) {
   const selected = selectedLayerIds.includes(layer.id);
+  const layerInfo = findLayerInfoInDocument(document, layer.id);
+  const maskLayer = layer.clippingMask ? findLayerInfoInDocument(document, layer.clippingMask.maskLayerId)?.layer : undefined;
+  const maskIndent = maskLayer ? 24 : 0;
+  const canSetMask =
+    Boolean(selectedMaskLayer && layerInfo && selectedMaskLayer.layer.id !== layer.id && selectedMaskLayer.artboardId === layerInfo.artboardId && selectedMaskLayer.parentGroupId === layerInfo.parentGroupId);
   return (
     <div>
-      <div className={`flex items-center gap-2 rounded-md px-2 py-1 ${selected ? "bg-white text-black" : "text-white/80 hover:bg-white/10 hover:text-white"}`} style={{ paddingLeft: 8 + depth * 12 }}>
+      <div
-        {layer.visible ? <Eye size={14} weight="regular" /> : <EyeSlash size={14} weight="regular" />}
+        draggable
-        {layer.locked ? <Lock size={14} weight="regular" /> : <LockOpen size={14} weight="regular" />}
+        className={`group flex w-full items-center gap-3 rounded-xl px-3 py-2 text-left transition ${selected ? "bg-white text-black shadow-sm" : "text-white/75 hover:bg-white/[0.07] hover:text-white"}`}
-        <span className="min-w-0 flex-1 truncate">{layer.name}</span>
+        style={{ paddingLeft: 12 + depth * 16 + maskIndent }}
+        onDragStart={(event) => {
+          event.dataTransfer.effectAllowed = "move";
+          event.dataTransfer.setData("text/plain", layer.id);
+          draggedLayerId.current = layer.id;
+        }}
+        onDragEnd={() => {
+          draggedLayerId.current = undefined;
+        }}
+        onDragOver={(event) => {
+          if (draggedLayerId.current && draggedLayerId.current !== layer.id) event.preventDefault();
+        }}
+        onDrop={(event) => {
+          event.preventDefault();
+          const sourceLayerId = draggedLayerId.current ?? event.dataTransfer.getData("text/plain");
+          if (sourceLayerId && sourceLayerId !== layer.id) dropLayer(document, sourceLayerId, { artboardId, layer }, event, dispatch);
+          draggedLayerId.current = undefined;
+        }}
+      >
+        {maskLayer ? <span className={selected ? "text-black/40" : "text-sky-200/55"}>↳</span> : null}
+        <button type="button" className={selected ? "text-black/55" : "text-white/45 transition hover:text-white"} aria-label={layer.visible ? "Hide layer" : "Show layer"} onClick={() => dispatch(commandIds.documentSetLayerVisible, { layerId: layer.id, visible: !layer.visible })}>
+          {layer.visible ? <Eye size={17} weight="regular" /> : <EyeSlash size={17} weight="regular" />}
+        </button>
+        {editingTitle?.type === "layer" && editingTitle.id === layer.id ? (
+          <RenameInput
+            value={editingTitle.draft}
+            onChange={(draft) => setEditingTitle({ ...editingTitle, draft })}
+            onCancel={() => setEditingTitle(undefined)}
+            onCommit={() => {
+              dispatch(commandIds.documentRenameLayer, { layerId: layer.id, name: editingTitle.draft });
+              setEditingTitle(undefined);
+            }}
+          />
+        ) : (
+          <button
+            type="button"
+            className="min-w-0 flex-1 truncate text-left font-medium"
+            onClick={() => dispatch(commandIds.selectionSet, { artboardId, layerIds: [layer.id] })}
+            onDoubleClick={() => setEditingTitle({ type: "layer", id: layer.id, draft: layer.name })}
+          >
+            {layer.name}
+          </button>
+        )}
+        <button
+          type="button"
+          className={selected ? "text-black/45" : "text-white/25 transition hover:text-white/70"}
+          aria-label={layer.clippingMask ? "Clear layer mask" : "Use selected layer as mask"}
+          title={layer.clippingMask ? "Clear mask" : "Use selected layer as mask"}
+          disabled={!layer.clippingMask && !canSetMask}
+          onClick={() => dispatch(commandIds.documentSetLayerClippingMask, { layerId: layer.id, maskLayerId: layer.clippingMask ? undefined : selectedMaskLayer?.layer.id })}
+        >
+          <Stack size={17} weight={layer.clippingMask ? "fill" : "regular"} />
+        </button>
+        <button type="button" className={selected ? "text-black/45" : "text-white/25 transition hover:text-white/70"} aria-label={layer.locked ? "Unlock layer" : "Lock layer"} onClick={() => dispatch(commandIds.documentSetLayerLocked, { layerId: layer.id, locked: !layer.locked })}>
+          {layer.locked ? <Lock size={17} weight="regular" /> : <LockOpen size={17} weight="regular" />}
+        </button>
       </div>
-      {layer.type === "group" ? layer.children.map((child) => <LayerRow key={child.id} layer={child} depth={depth + 1} selectedLayerIds={selectedLayerIds} />) : null}
+      {maskLayer ? (
+        <div className="mt-1 flex items-center gap-2 text-xs text-sky-100/60" style={{ paddingLeft: 52 + depth * 16 + maskIndent }}>
+          <span className="h-px w-5 bg-sky-200/25" />
+          <span>masked by {maskLayer.name}</span>
+        </div>
+      ) : null}
+      {layer.type === "group"
+        ? layer.children.map((child) => (
+            <LayerRow
+              key={child.id}
+              document={document}
+              artboardId={artboardId}
+              layer={child}
+              depth={depth + 1}
+              selectedLayerIds={selectedLayerIds}
+              draggedLayerId={draggedLayerId}
+              editingTitle={editingTitle}
+              setEditingTitle={setEditingTitle}
+              selectedMaskLayer={selectedMaskLayer}
+              dispatch={dispatch}
+            />
+          ))
+        : null}
     </div>
   );
 }
 
-function iconButtonClass() {
+type EditingTitle =
-  return "grid size-7 place-items-center rounded-full text-white/80 transition hover:bg-white/10 hover:text-white focus:outline-none focus-visible:outline-none";
+  | { type: "artboard"; id: ArtboardId; draft: string }
+  | { type: "layer"; id: string; draft: string };
+
+function RenameInput({ value, onChange, onCommit, onCancel }: { value: string; onChange: (value: string) => void; onCommit: () => void; onCancel: () => void }) {
+  return (
+    <input
+      autoFocus
+      className="min-w-0 flex-1 rounded-md bg-white px-2 py-1 font-medium text-black outline-none ring-1 ring-black/10 focus:ring-sky-300/50"
+      value={value}
+      onChange={(event) => onChange(event.target.value)}
+      onBlur={onCommit}
+      onFocus={(event) => event.currentTarget.select()}
+      onClick={(event) => event.stopPropagation()}
+      onDoubleClick={(event) => event.stopPropagation()}
+      onKeyDown={(event) => {
+        event.stopPropagation();
+        if (event.key === "Enter") event.currentTarget.blur();
+        if (event.key === "Escape") onCancel();
+      }}
+    />
+  );
+}
+
+function dropLayer(
+  document: ImageDocument,
+  sourceLayerId: string,
+  target: { artboardId: ArtboardId; layer: Layer },
+  event: DragEvent<HTMLElement>,
+  dispatch: AppStore["dispatch"],
+) {
+  const rect = event.currentTarget.getBoundingClientRect();
+  const command = resolveLayerDrop({
+    document,
+    sourceLayerId,
+    target,
+    verticalRatio: (event.clientY - rect.top) / Math.max(1, rect.height),
+  });
+  if (command) dispatch(commandIds.documentMoveLayer, command);
+}
+
+function deleteSelection(selection: SelectionState, selectedLayer: LayerInfo | undefined, dispatch: AppStore["dispatch"]) {
+  if (selectedLayer) {
+    dispatch(commandIds.documentRemoveLayer, { layerId: selectedLayer.layer.id });
+    return;
+  }
+  if (selection.artboardId) dispatch(commandIds.documentRemoveArtboard, { id: selection.artboardId });
+}
+
+function addArtboard(document: ImageDocument, dispatch: AppStore["dispatch"]) {
+  const index = document.artboards.length + 1;
+  dispatch(commandIds.documentAddArtboard, {
+    id: crypto.randomUUID(),
+    name: `Artboard ${index}`,
+    bounds: { x: (index - 1) * 40, y: (index - 1) * 40, w: 800, h: 600 },
+  });
+}
+
+function addLayer(document: ImageDocument, artboardId: ArtboardId, selectedLayer: LayerInfo | undefined, dispatch: AppStore["dispatch"]) {
+  const artboard = document.artboards.find((candidate) => candidate.id === artboardId);
+  if (!artboard) return;
+
+  const assetId = crypto.randomUUID();
+  const layerId = crypto.randomUUID();
+  const width = Math.max(1, Math.round(artboard.bounds.w));
+  const height = Math.max(1, Math.round(artboard.bounds.h));
+  const source = `data:image/svg+xml,${encodeURIComponent(`<svg xmlns="http://www.w3.org/2000/svg" width="${width}" height="${height}"></svg>`)}`;
+
+  dispatch(commandIds.documentAddAsset, {
+    asset: {
+      id: assetId,
+      name: "Empty Layer",
+      mimeType: "image/svg+xml",
+      source,
+      intrinsicSize: { w: width, h: height },
+    },
+  });
+  dispatch(commandIds.documentAddImageLayer, {
+    artboardId,
+    parentGroupId: selectedLayer?.layer.type === "group" ? selectedLayer.layer.id : undefined,
+    layer: {
+      id: layerId,
+      type: "image",
+      name: "Layer",
+      visible: true,
+      locked: false,
+      opacity: 1,
+      assetId,
+      transform: { position: { x: artboard.bounds.x, y: artboard.bounds.y }, scale: { x: 1, y: 1 }, rotation: 0 },
+    },
+  });
+  dispatch(commandIds.selectionSet, { artboardId, layerIds: [layerId] });
+}
+
+function addGroup(artboardId: ArtboardId, dispatch: AppStore["dispatch"]) {
+  dispatch(commandIds.documentAddGroupLayer, { artboardId, group: createGroup("Group") });
+}
+
+function groupSelection(artboardId: ArtboardId, layerIds: string[], dispatch: AppStore["dispatch"]) {
+  dispatch(commandIds.documentGroupLayers, { artboardId, layerIds, group: createGroup("Group") });
+}
+
+function moveLayer(document: ImageDocument, info: LayerInfo, direction: -1 | 1, dispatch: AppStore["dispatch"]) {
+  const siblings = info.parentGroupId ? findGroup(document, info.parentGroupId)?.children : document.artboards.find((artboard) => artboard.id === info.artboardId)?.layers;
+  if (!siblings) return;
+  const currentIndex = siblings.findIndex((layer) => layer.id === info.layer.id);
+  if (currentIndex < 0) return;
+  dispatch(commandIds.documentMoveLayer, {
+    layerId: info.layer.id,
+    toArtboardId: info.artboardId,
+    toParentGroupId: info.parentGroupId,
+    toIndex: currentIndex + direction,
+  });
+}
+
+function createGroup(name: string): Layer {
+  return {
+    id: crypto.randomUUID(),
+    type: "group",
+    name,
+    visible: true,
+    locked: false,
+    opacity: 1,
+    transform: { position: { x: 0, y: 0 }, scale: { x: 1, y: 1 }, rotation: 0 },
+    children: [],
+  };
+}
+
+function toolbarButtonClass() {
+  return "inline-flex h-8 items-center gap-1.5 rounded-full border border-white/10 bg-white/[0.04] px-3 text-white/75 transition hover:border-white/20 hover:bg-white/10 hover:text-white disabled:pointer-events-none disabled:opacity-35";
+}
+
+function iconButtonClass() {
+  return "grid size-8 place-items-center rounded-full text-white/70 transition hover:bg-white/10 hover:text-white focus:outline-none focus-visible:outline-none";
 }

view/bottom-controls/SelectionControls.tsx

@@ -1,36 +0,0 @@
-import { Stack } from "@phosphor-icons/react";
-import type { SelectionSummary } from "../selectionSummary";
-import { BottomControlDivider } from "./Divider";
-import { bottomControlButtonClass } from "./styles";
-
-export type SelectionControlsProps = {
-  selection: SelectionSummary;
-  onOpenLayers: () => void;
-};
-
-export function SelectionControls({ selection, onOpenLayers }: SelectionControlsProps) {
-  const label = selectionLabel(selection);
-
-  return (
-    <>
-      <button type="button" className={bottomControlButtonClass()} aria-label="Open layers" title="Open layers" onClick={onOpenLayers}>
-        <Stack size={16} weight="regular" />
-      </button>
-      <BottomControlDivider />
-      <span className="max-w-48 truncate px-1 text-white">{label}</span>
-    </>
-  );
-}
-
-function selectionLabel(selection: SelectionSummary) {
-  switch (selection.type) {
-    case "artboard":
-      return `${selection.name} · ${selection.layerCount} layers`;
-    case "layer":
-      return selection.name;
-    case "multi-layer":
-      return `${selection.count} layers selected`;
-    case "none":
-      return "";
-  }
-}

view/bottom-controls/TransformControls.tsx

@@ -1,28 +1,100 @@
+import { useEffect, useState, type Dispatch, type SetStateAction } from "react";
 import { BoundingBox } from "@phosphor-icons/react";
+import { commandIds } from "@commands/ids";
 import type { Rect } from "@core/geometry";
+import type { AppStore } from "@editor/store";
+import type { TransformTarget } from "@editor/transform";
 import { BottomControlDivider } from "./Divider";
-import { bottomControlIconSlotClass, bottomControlLabelClass, bottomControlValueClass } from "./styles";
+import { bottomControlIconSlotClass, bottomControlInputClass, bottomControlLabelClass } from "./styles";
 
 export type TransformControlsProps = {
   bounds: Rect;
+  target: TransformTarget;
+  dispatch: AppStore["dispatch"];
 };
 
-export function TransformControls({ bounds }: TransformControlsProps) {
+type BoundsField = keyof Rect;
+
+export function TransformControls({ bounds, target, dispatch }: TransformControlsProps) {
+  const [draft, setDraft] = useState(() => draftFromBounds(bounds));
+
+  useEffect(() => {
+    setDraft(draftFromBounds(bounds));
+  }, [bounds.x, bounds.y, bounds.w, bounds.h]);
+
+  const commitField = (field: BoundsField) => {
+    const value = Number.parseFloat(draft[field]);
+    if (!Number.isFinite(value)) {
+      setDraft(draftFromBounds(bounds));
+      return;
+    }
+
+    dispatch(commandIds.transformSetBounds, {
+      target,
+      bounds: {
+        ...bounds,
+        [field]: field === "w" || field === "h" ? Math.max(1, value) : value,
+      },
+    });
+  };
+
   return (
     <div className="flex w-full items-center justify-center gap-2 tabular-nums">
       <span className={bottomControlIconSlotClass()}>
         <BoundingBox size={16} weight="regular" />
       </span>
       <BottomControlDivider />
-      <span className={bottomControlLabelClass()}>X</span>
+      <BoundsInput label="X" field="x" draft={draft.x} setDraft={setDraft} commitField={commitField} />
-      <span className={bottomControlValueClass()}>{Math.round(bounds.x)}</span>
+      <BoundsInput label="Y" field="y" draft={draft.y} setDraft={setDraft} commitField={commitField} />
-      <span className={bottomControlLabelClass()}>Y</span>
-      <span className={bottomControlValueClass()}>{Math.round(bounds.y)}</span>
       <BottomControlDivider />
-      <span className={bottomControlLabelClass()}>W</span>
+      <BoundsInput label="W" field="w" draft={draft.w} setDraft={setDraft} commitField={commitField} />
-      <span className={bottomControlValueClass()}>{Math.round(bounds.w)}</span>
+      <BoundsInput label="H" field="h" draft={draft.h} setDraft={setDraft} commitField={commitField} />
-      <span className={bottomControlLabelClass()}>H</span>
-      <span className={bottomControlValueClass()}>{Math.round(bounds.h)}</span>
     </div>
   );
 }
+
+function BoundsInput({
+  label,
+  field,
+  draft,
+  setDraft,
+  commitField,
+}: {
+  label: string;
+  field: BoundsField;
+  draft: string;
+  setDraft: Dispatch<SetStateAction<Record<BoundsField, string>>>;
+  commitField: (field: BoundsField) => void;
+}) {
+  return (
+    <label className="flex items-center gap-1">
+      <span className={bottomControlLabelClass()}>{label}</span>
+      <input
+        className={bottomControlInputClass()}
+        inputMode="decimal"
+        value={draft}
+        aria-label={label}
+        onChange={(event) => setDraft((current) => ({ ...current, [field]: event.target.value }))}
+        onBlur={() => commitField(field)}
+        onFocus={(event) => event.currentTarget.select()}
+        onKeyDown={(event) => {
+          event.stopPropagation();
+          if (event.key === "Enter") {
+            commitField(field);
+            event.currentTarget.blur();
+          }
+          if (event.key === "Escape") event.currentTarget.blur();
+        }}
+      />
+    </label>
+  );
+}
+
+function draftFromBounds(bounds: Rect): Record<BoundsField, string> {
+  return {
+    x: String(Math.round(bounds.x)),
+    y: String(Math.round(bounds.y)),
+    w: String(Math.round(bounds.w)),
+    h: String(Math.round(bounds.h)),
+  };
+}

view/bottom-controls/styles.ts

@@ -10,6 +10,10 @@ export function bottomControlValueClass() {
   return "min-w-10 text-center text-white";
 }
 
+export function bottomControlInputClass() {
+  return "h-7 w-14 px-1 text-center text-white outline-none transition placeholder:text-white/30 focus:text-white";
+}
+
 export function bottomControlIconSlotClass() {
   return "grid size-7 place-items-center rounded-full text-white/80";
 }

view/exportArtboardPng.ts

@@ -0,0 +1,72 @@
+import type { Artboard } from "@core/artboard";
+import type { Asset } from "@core/asset";
+import type { Layer } from "@core/layer";
+
+export async function downloadArtboardPng(artboard: Artboard, assets: readonly Asset[]) {
+  const width = Math.max(1, Math.round(artboard.bounds.w));
+  const height = Math.max(1, Math.round(artboard.bounds.h));
+  const canvas = document.createElement("canvas");
+  canvas.width = width;
+  canvas.height = height;
+
+  const context = canvas.getContext("2d");
+  if (!context) throw new Error("Canvas 2D is not available");
+
+  if (artboard.backgroundColor !== "transparent") {
+    context.fillStyle = artboard.backgroundColor;
+    context.fillRect(0, 0, width, height);
+  }
+
+  context.save();
+  context.translate(-artboard.bounds.x, -artboard.bounds.y);
+  for (const layer of artboard.layers) await drawLayer(context, layer, assets);
+  context.restore();
+
+  const url = canvas.toDataURL("image/png");
+  const link = document.createElement("a");
+  link.href = url;
+  link.download = `${safeFilename(artboard.name)}.png`;
+  link.click();
+}
+
+async function drawLayer(context: CanvasRenderingContext2D, layer: Layer, assets: readonly Asset[]) {
+  if (!layer.visible) return;
+
+  context.save();
+  context.globalAlpha *= layer.opacity;
+
+  if (layer.type === "group") {
+    for (const child of layer.children) await drawLayer(context, child, assets);
+    context.restore();
+    return;
+  }
+
+  const asset = assets.find((candidate) => candidate.id === layer.assetId);
+  if (!asset) {
+    context.restore();
+    return;
+  }
+
+  const image = await loadImage(asset.source);
+  context.drawImage(
+    image,
+    layer.transform.position.x,
+    layer.transform.position.y,
+    asset.intrinsicSize.w * layer.transform.scale.x,
+    asset.intrinsicSize.h * layer.transform.scale.y,
+  );
+  context.restore();
+}
+
+function loadImage(source: string) {
+  return new Promise<HTMLImageElement>((resolve, reject) => {
+    const image = new Image();
+    image.onload = () => resolve(image);
+    image.onerror = () => reject(new Error("Failed to load image for export"));
+    image.src = source;
+  });
+}
+
+function safeFilename(name: string) {
+  return name.trim().replace(/[^a-z0-9-_]+/gi, "-").replace(/^-+|-+$/g, "") || "artboard";
+}

view/selectionSummary.ts

@@ -1,43 +0,0 @@
-import type { ImageDocument } from "@core/document";
-import type { Layer } from "@core/layer";
-import type { SelectionState } from "@editor/state";
-
-export type SelectionSummary =
-  | { type: "none" }
-  | { type: "artboard"; name: string; layerCount: number }
-  | { type: "layer"; name: string; layer: Layer }
-  | { type: "multi-layer"; count: number; layers: Layer[] };
-
-export function getSelectionSummary(document: ImageDocument, selection: SelectionState): SelectionSummary {
-  const selectedLayers = selection.layerIds.flatMap((layerId) => {
-    const layer = findLayer(document.artboards.flatMap((artboard) => artboard.layers), layerId);
-    return layer ? [layer] : [];
-  });
-
-  if (selectedLayers.length === 1 && selectedLayers[0]) {
-    return { type: "layer", name: selectedLayers[0].name, layer: selectedLayers[0] };
-  }
-
-  if (selectedLayers.length > 1) {
-    return { type: "multi-layer", count: selectedLayers.length, layers: selectedLayers };
-  }
-
-  if (selection.artboardId) {
-    const artboard = document.artboards.find((candidate) => candidate.id === selection.artboardId);
-    if (artboard) return { type: "artboard", name: artboard.name, layerCount: artboard.layers.length };
-  }
-
-  return { type: "none" };
-}
-
-function findLayer(layers: Layer[], layerId: string): Layer | undefined {
-  for (const layer of layers) {
-    if (layer.id === layerId) return layer;
-    if (layer.type === "group") {
-      const child = findLayer(layer.children, layerId);
-      if (child) return child;
-    }
-  }
-
-  return undefined;
-}