feat(site-builder): page duplicate/reorder/set-landing + fix cross-page node copy/paste

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

craft/src/hooks/clipboard.test.ts

@@ -1,29 +1,95 @@
 import { describe, test, expect, afterEach } from 'vitest';
-import { getClipboardNodeId, setClipboardNodeId } from './clipboard';
+import type { NodeTree } from '@craftjs/core';
+import { getClipboardTree, setClipboardTree } from './clipboard';
+
+function makeTree(rootId: string, props: Record<string, unknown> = {}): NodeTree {
+  return {
+    rootNodeId: rootId,
+    nodes: {
+      [rootId]: {
+        id: rootId,
+        data: {
+          type: { resolvedName: 'Container' },
+          name: 'Container',
+          displayName: 'Container',
+          props,
+          custom: {},
+          isCanvas: false,
+          parent: 'wherever-it-originally-lived',
+          nodes: [],
+          linkedNodes: {},
+          hidden: false,
+        },
+        info: {},
+        events: { selected: false, dragged: false, hovered: false },
+        dom: null,
+        related: {},
+        rules: {},
+        _hydrationTimestamp: 0,
+      } as unknown as NodeTree['nodes'][string],
+    },
+  };
+}
 
 describe('clipboard', () => {
   afterEach(() => {
-    setClipboardNodeId(null);
+    setClipboardTree(null);
   });
 
   test('starts empty', () => {
-    expect(getClipboardNodeId()).toBeNull();
+    expect(getClipboardTree()).toBeNull();
   });
 
-  test('set then get returns the stored node id', () => {
-    setClipboardNodeId('node-123');
-    expect(getClipboardNodeId()).toBe('node-123');
+  test('set then get returns a tree with the same root id and shape', () => {
+    const tree = makeTree('node-123', { text: 'hello' });
+    setClipboardTree(tree);
+    const got = getClipboardTree();
+    expect(got).not.toBeNull();
+    expect(got!.rootNodeId).toBe('node-123');
+    expect(got!.nodes['node-123'].data.props).toEqual({ text: 'hello' });
   });
 
   test('is a shared module-level store -- overwriting replaces the previous value', () => {
-    setClipboardNodeId('first');
-    setClipboardNodeId('second');
-    expect(getClipboardNodeId()).toBe('second');
+    setClipboardTree(makeTree('first'));
+    setClipboardTree(makeTree('second'));
+    expect(getClipboardTree()!.rootNodeId).toBe('second');
   });
 
   test('can be cleared back to null', () => {
-    setClipboardNodeId('node-123');
-    setClipboardNodeId(null);
-    expect(getClipboardNodeId()).toBeNull();
+    setClipboardTree(makeTree('node-123'));
+    setClipboardTree(null);
+    expect(getClipboardTree()).toBeNull();
+  });
+
+  test('deep-clones on set: mutating the original tree after set does not affect the stored snapshot', () => {
+    const original = makeTree('node-123', { text: 'original' });
+    setClipboardTree(original);
+
+    // Mutate the original tree's props object directly (as if the source
+    // node were edited, or the same live node got copied again).
+    (original.nodes['node-123'].data.props as Record<string, unknown>).text = 'mutated';
+
+    expect(getClipboardTree()!.nodes['node-123'].data.props).toEqual({ text: 'original' });
+  });
+
+  test('deep-clones nested props (arrays/objects), not just the top-level props object', () => {
+    const original = makeTree('node-123', { links: [{ url: 'https://example.com' }] });
+    setClipboardTree(original);
+
+    (original.nodes['node-123'].data.props as any).links[0].url = 'https://mutated.example.com';
+
+    expect((getClipboardTree()!.nodes['node-123'].data.props as any).links[0].url).toBe(
+      'https://example.com',
+    );
+  });
+
+  test('survives the original tree object being discarded entirely (detached copy, not a live reference)', () => {
+    let tree: NodeTree | null = makeTree('node-abc', { text: 'snapshot' });
+    setClipboardTree(tree);
+    tree = null; // simulate the original page's node/tree going away entirely
+
+    const got = getClipboardTree();
+    expect(got).not.toBeNull();
+    expect(got!.nodes['node-abc'].data.props).toEqual({ text: 'snapshot' });
   });
 });

craft/src/hooks/clipboard.ts

@@ -1,3 +1,5 @@
+import type { Node, NodeId, NodeTree } from '@craftjs/core';
+
 /**
  * Tiny shared clipboard for canvas node copy/paste.
  *
@@ -9,15 +11,71 @@
  * Deliberately not React state -- nothing in the UI needs to re-render
  * reactively when the clipboard changes; consumers just read the current
  * value at the moment they need it (on paste, or when a menu opens).
+ *
+ * Historical bug (cross-page copy/paste): this used to store only the copied
+ * node's bare id (`clipboardNodeId`) and re-resolve it via `query.node(id)`
+ * at paste time. That works fine same-page, but the moment the user switches
+ * pages the canvas is re-deserialized to the target page's Craft.js state --
+ * the copied id no longer exists in `query` at all -- so a cross-page paste
+ * silently no-op'd (or threw, caught, and swallowed). Storing a detached
+ * TREE SNAPSHOT at copy time instead means paste never needs to look the
+ * source id up again: it just hands the snapshot to `regenerateTreeIds` +
+ * `actions.addNodeTree`, which works identically regardless of which page's
+ * state is currently loaded on the canvas.
  */
-let clipboardNodeId: string | null = null;
+let clipboardTree: NodeTree | null = null;
 
-/** Returns the id of the node currently on the clipboard, or null if empty. */
-export function getClipboardNodeId(): string | null {
-  return clipboardNodeId;
+/**
+ * Deep, detached clone of a live Craft.js `NodeTree` (as returned by
+ * `query.node(id).toNodeTree()`).
+ *
+ * Not a plain `structuredClone(tree)`: for a REAL (live) Craft.js node,
+ * `data.type` is the actual component function/class reference (not a
+ * serializable `{resolvedName}` wrapper) -- `structuredClone` cannot clone a
+ * function and throws `DataCloneError` (see the identical note on
+ * `regenerateTreeIds` in `utils/craft-tree.ts`, which hit this exact bug
+ * historically). `type` is a stable reference shared by every node of that
+ * component across the whole app (it doesn't change per page), so it's safe
+ * to keep by reference -- only the mutable per-node data (`props`, `custom`,
+ * `nodes`, `linkedNodes`) needs an actual deep copy so a later mutation (a
+ * subsequent paste's `setProp`, or a fresh copy of the same live node)
+ * can never reach back into this stored snapshot.
+ */
+function cloneNodeTree(tree: NodeTree): NodeTree {
+  const nodes: Record<NodeId, Node> = {};
+  for (const [id, node] of Object.entries(tree.nodes)) {
+    nodes[id] = {
+      ...node,
+      data: {
+        ...node.data,
+        props: structuredClone(node.data.props),
+        custom: structuredClone(node.data.custom),
+        nodes: [...(node.data.nodes || [])],
+        linkedNodes: { ...(node.data.linkedNodes || {}) },
+      },
+    };
+  }
+  return { rootNodeId: tree.rootNodeId, nodes };
 }
 
-/** Sets (or clears, with `null`) the node id on the clipboard. */
-export function setClipboardNodeId(nodeId: string | null): void {
-  clipboardNodeId = nodeId;
+/**
+ * Returns the tree snapshot currently on the clipboard, or null if empty.
+ * The returned tree is safe to hand straight to `regenerateTreeIds` --
+ * `regenerateTreeIds` never mutates its input, so repeated pastes of the
+ * same clipboard contents (including across a page switch) all work off the
+ * same untouched snapshot.
+ */
+export function getClipboardTree(): NodeTree | null {
+  return clipboardTree;
+}
+
+/**
+ * Sets (or clears, with `null`) the tree snapshot on the clipboard. The tree
+ * is deep-cloned before being stored (see `cloneNodeTree`) so it is fully
+ * detached from the live Craft.js node it was captured from -- it survives
+ * that node being deleted, mutated, or (the whole point) the canvas being
+ * re-deserialized to a different page entirely.
+ */
+export function setClipboardTree(tree: NodeTree | null): void {
+  clipboardTree = tree ? cloneNodeTree(tree) : null;
 }

craft/src/hooks/useKeyboardShortcuts.test.tsx

@@ -4,7 +4,7 @@ import { createRoot, Root } from 'react-dom/client';
 import { act } from 'react-dom/test-utils';
 import type { NodeTree, Node } from '@craftjs/core';
 import { useKeyboardShortcuts } from './useKeyboardShortcuts';
-import { getClipboardNodeId, setClipboardNodeId } from './clipboard';
+import { getClipboardTree, setClipboardTree } from './clipboard';
 
 /**
  * Regression coverage: Ctrl/Cmd+V must run the copied subtree through
@@ -15,6 +15,13 @@ import { getClipboardNodeId, setClipboardNodeId } from './clipboard';
  * ROOT-fallback targeting, the empty-clipboard no-op, and the existing
  * input-focus guard.
  *
+ * Also covers the cross-page clipboard fix: copy stores a detached TREE
+ * SNAPSHOT (`setClipboardTree`), not a bare node id -- so paste never needs
+ * to re-resolve the original node via `query.node(id)`, which is exactly
+ * what breaks once the canvas has been re-deserialized to a different page
+ * (see `hooks/clipboard.ts` and the cross-page integration test in
+ * `test-utils/integration/duplicate-paste.integration.test.tsx`).
+ *
  * Mock pattern mirrors PageContext.pure-updaters.test.tsx /
  * PageContext.slug.test.tsx: a fake `useEditor` exposing `query`/`actions`,
  * mounted via a bare consumer component, with REAL `keydown` events
@@ -27,6 +34,7 @@ import { getClipboardNodeId, setClipboardNodeId } from './clipboard';
  */
 
 const addNodeTreeMock = vi.fn();
+const selectNodeMock = vi.fn();
 let selectedIds: string[] = [];
 
 function makeNode(id: string, parent: string | null, children: string[] = []): Node {
@@ -62,9 +70,10 @@ const COPIED_TREE: NodeTree = {
   },
 };
 
-const nodeStore: Record<string, { data: { parent: string | null } }> = {
+const nodeStore: Record<string, { data: { parent: string | null; nodes?: string[] } }> = {
   'selected-1': { data: { parent: 'parent-container-1' } },
-  ROOT: { data: { parent: null } },
+  'parent-container-1': { data: { parent: null, nodes: ['other-sibling', 'selected-1'] } },
+  ROOT: { data: { parent: null, nodes: [] } },
   'copied-root-1': { data: { parent: 'wherever-it-originally-lived' } },
 };
 
@@ -88,6 +97,7 @@ vi.mock('@craftjs/core', () => ({
     },
     actions: {
       addNodeTree: addNodeTreeMock,
+      selectNode: selectNodeMock,
       history: { undo: vi.fn(), redo: vi.fn() },
       delete: vi.fn(),
       clearEvents: vi.fn(),
@@ -145,44 +155,51 @@ const Consumer: React.FC = () => {
 beforeEach(() => {
   selectedIds = [];
   addNodeTreeMock.mockClear();
+  selectNodeMock.mockClear();
   regenerateTreeIdsMock.mockClear();
-  setClipboardNodeId(null);
+  setClipboardTree(null);
 });
 
 afterEach(() => {
-  setClipboardNodeId(null);
+  setClipboardTree(null);
   if (root) unmount();
 });
 
 describe('useKeyboardShortcuts: Ctrl/Cmd+C / Ctrl/Cmd+V', () => {
-  test('Ctrl+C copies the selected node id to the clipboard', () => {
+  test('Ctrl+C copies the selected node`s subtree (a tree snapshot, not a bare id) to the clipboard', () => {
     render(<Consumer />);
-    selectedIds = ['selected-1'];
+    selectedIds = ['copied-root-1'];
 
     pressKey('c');
 
-    expect(getClipboardNodeId()).toBe('selected-1');
+    const clip = getClipboardTree();
+    expect(clip).not.toBeNull();
+    expect(clip!.rootNodeId).toBe('copied-root-1');
+    expect(Object.keys(clip!.nodes).sort()).toEqual(['copied-child-1', 'copied-root-1']);
   });
 
-  test('Ctrl+V pastes as a sibling of the selection (selected node`s data.parent) with FRESH ids', () => {
+  test('Ctrl+V pastes as a sibling of the selection, immediately after it, with FRESH ids', () => {
     render(<Consumer />);
 
     selectedIds = ['copied-root-1'];
     pressKey('c');
-    expect(getClipboardNodeId()).toBe('copied-root-1');
+    expect(getClipboardTree()!.rootNodeId).toBe('copied-root-1');
 
     selectedIds = ['selected-1'];
     pressKey('v');
 
     // regenerateTreeIds actually ran before the tree was handed to Craft.js.
     expect(regenerateTreeIdsMock).toHaveBeenCalledTimes(1);
-    expect(regenerateTreeIdsMock).toHaveBeenCalledWith(COPIED_TREE);
+    expect(regenerateTreeIdsMock).toHaveBeenCalledWith(getClipboardTree());
 
     expect(addNodeTreeMock).toHaveBeenCalledTimes(1);
-    const [pastedTree, targetParent] = addNodeTreeMock.mock.calls[0];
+    const [pastedTree, targetParent, insertIndex] = addNodeTreeMock.mock.calls[0];
 
     // Sibling of the current selection: selected-1's data.parent.
     expect(targetParent).toBe('parent-container-1');
+    // Immediately after selected-1 (index 1 among parent-container-1's
+    // children), matching duplicate()'s "insert right after" UX.
+    expect(insertIndex).toBe(2);
 
     // The regression this guards: pasted ids must be fresh, never reuse the
     // ids the copied node already occupies in the live Craft.js tree.
@@ -193,9 +210,12 @@ describe('useKeyboardShortcuts: Ctrl/Cmd+C / Ctrl/Cmd+V', () => {
     for (const id of pastedIds) {
       expect(originalIds.has(id)).toBe(false);
     }
+
+    // The new copy is selected, same as duplicate()'s existing UX.
+    expect(selectNodeMock).toHaveBeenCalledWith(pastedTree.rootNodeId);
   });
 
-  test('Ctrl+V with selection at ROOT falls back to ROOT as the insertion parent', () => {
+  test('Ctrl+V with selection at ROOT falls back to appending into ROOT', () => {
     render(<Consumer />);
 
     selectedIds = ['copied-root-1'];
@@ -205,8 +225,24 @@ describe('useKeyboardShortcuts: Ctrl/Cmd+C / Ctrl/Cmd+V', () => {
     pressKey('v');
 
     expect(addNodeTreeMock).toHaveBeenCalledTimes(1);
-    const [, targetParent] = addNodeTreeMock.mock.calls[0];
+    const [, targetParent, insertIndex] = addNodeTreeMock.mock.calls[0];
     expect(targetParent).toBe('ROOT');
+    expect(insertIndex).toBeUndefined();
+  });
+
+  test('Ctrl+V with nothing selected falls back to appending into ROOT', () => {
+    render(<Consumer />);
+
+    selectedIds = ['copied-root-1'];
+    pressKey('c');
+
+    selectedIds = [];
+    pressKey('v');
+
+    expect(addNodeTreeMock).toHaveBeenCalledTimes(1);
+    const [, targetParent, insertIndex] = addNodeTreeMock.mock.calls[0];
+    expect(targetParent).toBe('ROOT');
+    expect(insertIndex).toBeUndefined();
   });
 
   test('Ctrl+V with an empty clipboard is a no-op', () => {
@@ -229,9 +265,9 @@ describe('useKeyboardShortcuts: Ctrl/Cmd+C / Ctrl/Cmd+V', () => {
     selectedIds = ['selected-1'];
 
     pressKey('c');
-    expect(getClipboardNodeId()).toBeNull();
+    expect(getClipboardTree()).toBeNull();
 
-    setClipboardNodeId('copied-root-1');
+    setClipboardTree(COPIED_TREE);
     pressKey('v');
     expect(addNodeTreeMock).not.toHaveBeenCalled();
 
@@ -252,7 +288,7 @@ describe('useKeyboardShortcuts: Ctrl/Cmd+C / Ctrl/Cmd+V', () => {
     selectedIds = ['selected-1'];
 
     pressKey('c');
-    expect(getClipboardNodeId()).toBeNull();
+    expect(getClipboardTree()).toBeNull();
 
     activeElementSpy.mockRestore();
   });

craft/src/hooks/useKeyboardShortcuts.ts

@@ -2,7 +2,7 @@ import { useEffect } from 'react';
 import { useEditor } from '@craftjs/core';
 import { findDeletableTarget } from '../utils/craft-helpers';
 import { regenerateTreeIds } from '../utils/craft-tree';
-import { getClipboardNodeId, setClipboardNodeId } from './clipboard';
+import { getClipboardTree, setClipboardTree } from './clipboard';
 
 function isInputFocused(): boolean {
   const el = document.activeElement;
@@ -86,13 +86,16 @@ export function useKeyboardShortcuts() {
         return;
       }
 
-      // Ctrl+C: copy selected node id to the shared clipboard
+      // Ctrl+C: copy the selected node's subtree (a detached snapshot, not
+      // just its id -- see clipboard.ts for why: an id-based clipboard can't
+      // survive a page switch, since the copied id no longer exists in
+      // `query` once the canvas is re-deserialized to a different page).
       if (ctrl && (e.key === 'c' || e.key === 'C')) {
         e.preventDefault();
         try {
           const selected = query.getEvent('selected').all();
           if (selected.length > 0 && selected[0] !== 'ROOT') {
-            setClipboardNodeId(selected[0]);
+            setClipboardTree(query.node(selected[0]).toNodeTree());
           }
         } catch (err) {
           console.error('Copy failed:', err);
@@ -100,25 +103,44 @@ export function useKeyboardShortcuts() {
         return;
       }
 
-      // Ctrl+V: paste the clipboard node as a sibling of the current selection
+      // Ctrl+V: paste the clipboard tree as a sibling of the current
+      // selection (immediately after it, matching duplicate()'s UX), or
+      // append to ROOT when nothing is selected. Works regardless of which
+      // page is currently on the canvas -- the clipboard tree is a detached
+      // snapshot, not a reference to a node that may no longer exist here.
       if (ctrl && (e.key === 'v' || e.key === 'V')) {
         e.preventDefault();
         try {
-          const sourceId = getClipboardNodeId();
-          if (!sourceId || !query.node(sourceId).get()) return;
+          const clip = getClipboardTree();
+          if (!clip) return;
 
           const selected = query.getEvent('selected').all();
-          if (selected.length === 0) return;
-          const selectedId = selected[0];
+          const selectedId = selected.length > 0 ? selected[0] : null;
 
-          let targetParent = 'ROOT';
-          if (selectedId !== 'ROOT') {
+          let targetParentId = 'ROOT';
+          let insertIndex: number | undefined;
+          if (selectedId && selectedId !== 'ROOT') {
             const node = query.node(selectedId).get();
-            targetParent = node?.data?.parent || 'ROOT';
+            const parentId: string | null | undefined = node?.data?.parent;
+            if (parentId) {
+              targetParentId = parentId;
+              try {
+                const siblings: string[] = query.node(parentId).get()?.data?.nodes || [];
+                const idx = siblings.indexOf(selectedId);
+                if (idx !== -1) insertIndex = idx + 1;
+              } catch {
+                // Leave insertIndex undefined -- addNodeTree appends when omitted.
+              }
+            }
           }
 
-          const tree = regenerateTreeIds(query.node(sourceId).toNodeTree());
-          actions.addNodeTree(tree, targetParent);
+          const tree = regenerateTreeIds(clip);
+          if (insertIndex !== undefined) {
+            actions.addNodeTree(tree, targetParentId, insertIndex);
+          } else {
+            actions.addNodeTree(tree, targetParentId);
+          }
+          actions.selectNode(tree.rootNodeId);
         } catch (err) {
           console.error('Paste failed:', err);
         }

craft/src/panels/context-menu/ContextMenu.tsx

@@ -3,7 +3,7 @@ import { useEditor } from '@craftjs/core';
 import { useSitesmithModal } from '../../state/SitesmithContext';
 import { buildSitesmithTarget } from '../../utils/sitesmith-target';
 import { regenerateTreeIds } from '../../utils/craft-tree';
-import { getClipboardNodeId, setClipboardNodeId } from '../../hooks/clipboard';
+import { getClipboardTree, setClipboardTree } from '../../hooks/clipboard';
 import { useNodeActions } from '../../hooks/useNodeActions';
 
 interface ContextMenuProps {
@@ -79,35 +79,54 @@ export const ContextMenu: React.FC<ContextMenuProps> = ({
   const copyNode = useCallback(() => {
     if (!nodeId || nodeId === 'ROOT') return;
     try {
-      setClipboardNodeId(nodeId);
+      // Store a detached subtree snapshot, not just the id -- an id-based
+      // clipboard can't survive a page switch (the copied id no longer
+      // exists in `query` once the canvas is re-deserialized to a different
+      // page's Craft.js state). See clipboard.ts.
+      setClipboardTree(query.node(nodeId).toNodeTree());
     } catch (e) {
       console.error('Copy failed:', e);
     }
     onClose();
-  }, [nodeId, onClose]);
+  }, [nodeId, query, onClose]);
 
   const pasteNode = useCallback(() => {
-    const sourceId = getClipboardNodeId();
-    if (!sourceId) {
+    const clip = getClipboardTree();
+    if (!clip) {
       onClose();
       return;
     }
     try {
-      if (!query.node(sourceId).get()) {
-        onClose();
-        return;
-      }
-
-      // Paste as a SIBLING of the right-clicked node, not as its child --
-      // using the clicked node itself as the parent throws when it's a leaf.
+      // Paste as a SIBLING of the right-clicked node (immediately after it,
+      // matching duplicate()'s UX), not as its child -- using the clicked
+      // node itself as the parent throws when it's a leaf. Falls back to
+      // appending into ROOT when nothing valid was right-clicked. This works
+      // regardless of which page is on the canvas -- the clipboard tree is a
+      // detached snapshot, not a reference to a node that may not exist here.
       let targetParent = 'ROOT';
+      let insertIndex: number | undefined;
       if (nodeId && nodeId !== 'ROOT') {
         const clickedNode = query.node(nodeId).get();
-        targetParent = clickedNode?.data?.parent || 'ROOT';
+        const parentId: string | null | undefined = clickedNode?.data?.parent;
+        if (parentId) {
+          targetParent = parentId;
+          try {
+            const siblings: string[] = query.node(parentId).get()?.data?.nodes || [];
+            const idx = siblings.indexOf(nodeId);
+            if (idx !== -1) insertIndex = idx + 1;
+          } catch {
+            // Leave insertIndex undefined -- addNodeTree appends when omitted.
+          }
+        }
       }
 
-      const tree = regenerateTreeIds(query.node(sourceId).toNodeTree());
-      actions.addNodeTree(tree, targetParent);
+      const tree = regenerateTreeIds(clip);
+      if (insertIndex !== undefined) {
+        actions.addNodeTree(tree, targetParent, insertIndex);
+      } else {
+        actions.addNodeTree(tree, targetParent);
+      }
+      actions.selectNode(tree.rootNodeId);
     } catch (e) {
       console.error('Paste failed:', e);
     }
@@ -176,7 +195,7 @@ export const ContextMenu: React.FC<ContextMenuProps> = ({
       icon: 'clipboard',
       shortcut: 'Ctrl+V',
       action: pasteNode,
-      disabled: !getClipboardNodeId(),
+      disabled: !getClipboardTree(),
       dividerAfter: true,
     },
     {

craft/src/panels/left/PagesPanel.tsx

@@ -15,6 +15,9 @@ export const PagesPanel: React.FC = () => {
     addPage,
     deletePage,
     renamePage,
+    duplicatePage,
+    movePage,
+    setLandingPage,
     updatePageSeo,
   } = usePages();
   const [isAdding, setIsAdding] = useState(false);
@@ -68,6 +71,33 @@ export const PagesPanel: React.FC = () => {
    * differently-colored category. The active/editing state reuses the same
    * accent-outline treatment the page list already uses for the active page,
    * so there's one consistent "this is what's currently open" affordance. */
+  /* ---------- Per-page-row icon button ----------
+   * Shared 24x24 icon-button styling used by every action in the page row
+   * (SEO settings, rename, duplicate, reorder, set-as-home, delete) so a new
+   * action slots in looking identical to the pre-existing gear/pencil/trash
+   * buttons -- same dark-theme neutral treatment, `disabled` dims the icon
+   * (matching how `disabled` already reads elsewhere in this panel, e.g. the
+   * "Add Page" button), and `danger` reuses the existing delete-button
+   * accent color. */
+  const pageActionBtnStyle = (opts: { disabled?: boolean; danger?: boolean } = {}): React.CSSProperties => ({
+    width: 24,
+    height: 24,
+    display: 'inline-flex',
+    alignItems: 'center',
+    justifyContent: 'center',
+    fontSize: 11,
+    color: opts.disabled
+      ? 'var(--color-text-dim)'
+      : opts.danger
+        ? 'var(--color-danger)'
+        : 'var(--color-text-muted)',
+    background: 'transparent',
+    border: 'none',
+    borderRadius: 'var(--radius-sm)',
+    cursor: opts.disabled ? 'default' : 'pointer',
+    opacity: opts.disabled ? 0.5 : 1,
+  });
+
   const zoneRowStyle = (isActive: boolean): React.CSSProperties => ({
     display: 'flex',
     alignItems: 'center',
@@ -344,26 +374,58 @@ export const PagesPanel: React.FC = () => {
                 </div>
               </div>
               <div
-                style={{ display: 'flex', gap: 4, flexShrink: 0 }}
+                style={{ display: 'flex', gap: 2, flexShrink: 0, flexWrap: 'wrap', justifyContent: 'flex-end', maxWidth: 96 }}
                 onClick={(e) => e.stopPropagation()}
               >
+                <button
+                  onClick={() => movePage(page.id, 'up')}
+                  disabled={pageIndex === 0}
+                  data-tooltip="Move up"
+                  aria-label={`Move ${page.name} up`}
+                  style={pageActionBtnStyle({ disabled: pageIndex === 0 })}
+                >
+                  <i className="fa fa-arrow-up" aria-hidden="true" />
+                </button>
+                <button
+                  onClick={() => movePage(page.id, 'down')}
+                  disabled={pageIndex === pages.length - 1}
+                  data-tooltip="Move down"
+                  aria-label={`Move ${page.name} down`}
+                  style={pageActionBtnStyle({ disabled: pageIndex === pages.length - 1 })}
+                >
+                  <i className="fa fa-arrow-down" aria-hidden="true" />
+                </button>
+                <button
+                  onClick={() => duplicatePage(page.id)}
+                  data-tooltip="Duplicate"
+                  aria-label={`Duplicate ${page.name}`}
+                  style={pageActionBtnStyle()}
+                >
+                  <i className="fa fa-clone" aria-hidden="true" />
+                </button>
+                {isLanding ? (
+                  <span
+                    data-tooltip="This is the home page"
+                    aria-label={`${page.name} is the home page`}
+                    style={pageActionBtnStyle({ disabled: true })}
+                  >
+                    <i className="fa fa-home" aria-hidden="true" />
+                  </span>
+                ) : (
+                  <button
+                    onClick={() => setLandingPage(page.id)}
+                    data-tooltip="Set as home page"
+                    aria-label={`Set ${page.name} as the home page`}
+                    style={pageActionBtnStyle()}
+                  >
+                    <i className="fa fa-home" aria-hidden="true" />
+                  </button>
+                )}
                 <button
                   onClick={() => setSeoSettingsPageId(page.id)}
                   data-tooltip="Page Settings (SEO)"
                   aria-label={`Page settings for ${page.name}`}
-                  style={{
-                    width: 24,
-                    height: 24,
-                    display: 'inline-flex',
-                    alignItems: 'center',
-                    justifyContent: 'center',
-                    fontSize: 11,
-                    color: 'var(--color-text-muted)',
-                    background: 'transparent',
-                    border: 'none',
-                    borderRadius: 'var(--radius-sm)',
-                    cursor: 'pointer',
-                  }}
+                  style={pageActionBtnStyle()}
                 >
                   <i className="fa fa-cog" aria-hidden="true" />
                 </button>
@@ -371,19 +433,7 @@ export const PagesPanel: React.FC = () => {
                   onClick={() => startEditing(page)}
                   data-tooltip="Rename"
                   aria-label={`Rename ${page.name}`}
-                  style={{
-                    width: 24,
-                    height: 24,
-                    display: 'inline-flex',
-                    alignItems: 'center',
-                    justifyContent: 'center',
-                    fontSize: 11,
-                    color: 'var(--color-text-muted)',
-                    background: 'transparent',
-                    border: 'none',
-                    borderRadius: 'var(--radius-sm)',
-                    cursor: 'pointer',
-                  }}
+                  style={pageActionBtnStyle()}
                 >
                   <i className="fa fa-pencil" aria-hidden="true" />
                 </button>
@@ -392,19 +442,7 @@ export const PagesPanel: React.FC = () => {
                     onClick={() => setDeleteConfirmId(page.id)}
                     data-tooltip="Delete"
                     aria-label={`Delete ${page.name}`}
-                    style={{
-                      width: 24,
-                      height: 24,
-                      display: 'inline-flex',
-                      alignItems: 'center',
-                      justifyContent: 'center',
-                      fontSize: 11,
-                      color: 'var(--color-text-muted)',
-                      background: 'transparent',
-                      border: 'none',
-                      borderRadius: 'var(--radius-sm)',
-                      cursor: 'pointer',
-                    }}
+                    style={pageActionBtnStyle({ danger: true })}
                   >
                     <i className="fa fa-trash" aria-hidden="true" />
                   </button>

craft/src/state/PageContext.pages-productivity.test.tsx

@@ -0,0 +1,427 @@
+import { describe, test, expect, vi, beforeEach } from 'vitest';
+import React from 'react';
+import { createRoot, Root } from 'react-dom/client';
+import { act } from 'react-dom/test-utils';
+import { PageProvider, usePages, applyLandingInvariant } from './PageContext';
+import { PageData } from '../types';
+
+/**
+ * PKG-I: page duplicate / reorder / set-landing.
+ *
+ * The landing-page invariant is: `pages[0]` is the landing page, slug
+ * LOCKED to `'index'`; every other page gets a real, unique slug. This
+ * suite covers:
+ *  - `applyLandingInvariant` as a pure function (unit tests, no provider).
+ *  - `movePage`/`setLandingPage` re-establishing the invariant after
+ *    reordering, via `PageProvider`.
+ *  - `duplicatePage` inserting a copy right after the source with a copied
+ *    craftState + seo and a unique slug, and switching the canvas to it.
+ */
+
+function makePage(overrides: Partial<PageData> & { id: string }): PageData {
+  return { name: overrides.id, slug: overrides.id, craftState: null, ...overrides };
+}
+
+describe('applyLandingInvariant (pure)', () => {
+  test('page at index 0 gets slug "index" even if it held a different slug', () => {
+    const pages = [
+      makePage({ id: 'a', name: 'About', slug: 'about' }),
+      makePage({ id: 'b', name: 'Home', slug: 'index' }),
+    ];
+    const result = applyLandingInvariant(pages);
+    expect(result[0].slug).toBe('index');
+    expect(result[0].id).toBe('a');
+  });
+
+  test('demotes the old landing page (now at index > 0) to a unique real slug', () => {
+    const pages = [
+      makePage({ id: 'a', name: 'About', slug: 'about' }),
+      makePage({ id: 'b', name: 'Home', slug: 'index' }),
+    ];
+    const result = applyLandingInvariant(pages);
+    const demoted = result.find((p) => p.id === 'b')!;
+    expect(demoted.slug).not.toBe('index');
+    expect(demoted.slug).toBe('home');
+  });
+
+  test('never produces two pages with slug "index"', () => {
+    const pages = [
+      makePage({ id: 'a', name: 'About', slug: 'about' }),
+      makePage({ id: 'b', name: 'Home', slug: 'index' }),
+      makePage({ id: 'c', name: 'Contact', slug: 'contact' }),
+    ];
+    const result = applyLandingInvariant(pages);
+    const indexSlugs = result.filter((p) => p.slug === 'index');
+    expect(indexSlugs).toHaveLength(1);
+    expect(indexSlugs[0].id).toBe('a');
+  });
+
+  test('demoted page slug is deduped against a colliding existing slug elsewhere in the array', () => {
+    const pages = [
+      makePage({ id: 'a', name: 'About', slug: 'about' }),
+      makePage({ id: 'b', name: 'Home', slug: 'index' }), // demoted page, named "Home" -> slugifies to "home"
+      makePage({ id: 'c', name: 'HomePage', slug: 'home' }), // unrelated page already using slug "home"
+    ];
+    const result = applyLandingInvariant(pages);
+    expect(result[0].slug).toBe('index');
+    const demoted = result.find((p) => p.id === 'b')!;
+    expect(demoted.slug).toBe('home-2');
+    const untouched = result.find((p) => p.id === 'c')!;
+    expect(untouched.slug).toBe('home');
+
+    const slugs = result.map((p) => p.slug);
+    expect(new Set(slugs).size).toBe(slugs.length);
+  });
+
+  test('non-landing pages that already have a real slug are left untouched', () => {
+    const pages = [
+      makePage({ id: 'a', name: 'Home', slug: 'index' }),
+      makePage({ id: 'b', name: 'About', slug: 'about' }),
+      makePage({ id: 'c', name: 'Contact', slug: 'contact' }),
+    ];
+    const result = applyLandingInvariant(pages);
+    expect(result[1]).toEqual(pages[1]);
+    expect(result[2]).toEqual(pages[2]);
+  });
+
+  test('empty array is a no-op', () => {
+    expect(applyLandingInvariant([])).toEqual([]);
+  });
+});
+
+/* ---------- PageProvider-mounted coverage ---------- */
+
+let serializeReturn = '{}';
+const deserializeMock = vi.fn();
+
+vi.mock('@craftjs/core', () => ({
+  useEditor: () => ({
+    query: { serialize: () => serializeReturn },
+    actions: { deserialize: deserializeMock },
+  }),
+}));
+
+let container: HTMLDivElement;
+let root: Root;
+
+function render(ui: React.ReactElement) {
+  container = document.createElement('div');
+  document.body.appendChild(container);
+  act(() => {
+    root = createRoot(container);
+    root.render(ui);
+  });
+}
+
+function unmount() {
+  act(() => {
+    root.unmount();
+  });
+  container.remove();
+}
+
+async function flushTimers() {
+  await act(async () => {
+    await new Promise((resolve) => setTimeout(resolve, 10));
+  });
+}
+
+beforeEach(() => {
+  serializeReturn = '{}';
+  deserializeMock.mockClear();
+});
+
+describe('PageContext.movePage', () => {
+  test('moves a page up, swapping with its neighbor', () => {
+    let ctx: ReturnType<typeof usePages> | null = null;
+    const Consumer: React.FC = () => {
+      ctx = usePages();
+      return null;
+    };
+    render(
+      <PageProvider>
+        <Consumer />
+      </PageProvider>,
+    );
+
+    act(() => ctx!.addPage('About', 'about'));
+    act(() => ctx!.addPage('Contact', 'contact'));
+    // pages: [Home(index0), About, Contact]
+    const contactId = ctx!.pages[2].id;
+
+    act(() => ctx!.movePage(contactId, 'up'));
+
+    expect(ctx!.pages.map((p) => p.name)).toEqual(['Home', 'Contact', 'About']);
+    // Landing invariant still holds -- Home untouched at index 0.
+    expect(ctx!.pages[0].slug).toBe('index');
+
+    unmount();
+  });
+
+  test('is a no-op at the top boundary', () => {
+    let ctx: ReturnType<typeof usePages> | null = null;
+    const Consumer: React.FC = () => {
+      ctx = usePages();
+      return null;
+    };
+    render(
+      <PageProvider>
+        <Consumer />
+      </PageProvider>,
+    );
+
+    act(() => ctx!.addPage('About', 'about'));
+    const homeId = ctx!.pages[0].id;
+    const before = ctx!.pages.map((p) => p.id);
+
+    act(() => ctx!.movePage(homeId, 'up'));
+
+    expect(ctx!.pages.map((p) => p.id)).toEqual(before);
+
+    unmount();
+  });
+
+  test('is a no-op at the bottom boundary', () => {
+    let ctx: ReturnType<typeof usePages> | null = null;
+    const Consumer: React.FC = () => {
+      ctx = usePages();
+      return null;
+    };
+    render(
+      <PageProvider>
+        <Consumer />
+      </PageProvider>,
+    );
+
+    act(() => ctx!.addPage('About', 'about'));
+    const aboutId = ctx!.pages[1].id;
+    const before = ctx!.pages.map((p) => p.id);
+
+    act(() => ctx!.movePage(aboutId, 'down'));
+
+    expect(ctx!.pages.map((p) => p.id)).toEqual(before);
+
+    unmount();
+  });
+
+  test('moving a non-landing page into index 0 promotes it and demotes the old landing page to a real slug', () => {
+    let ctx: ReturnType<typeof usePages> | null = null;
+    const Consumer: React.FC = () => {
+      ctx = usePages();
+      return null;
+    };
+    render(
+      <PageProvider>
+        <Consumer />
+      </PageProvider>,
+    );
+
+    act(() => ctx!.addPage('About', 'about'));
+    // pages: [Home(index0, slug index), About]
+    const aboutId = ctx!.pages[1].id;
+    const homeId = ctx!.pages[0].id;
+
+    act(() => ctx!.movePage(aboutId, 'up'));
+    // pages: [About, Home]
+
+    expect(ctx!.pages.map((p) => p.id)).toEqual([aboutId, homeId]);
+    expect(ctx!.pages[0].slug).toBe('index'); // About is now the landing page
+    const demotedHome = ctx!.pages.find((p) => p.id === homeId)!;
+    expect(demotedHome.slug).not.toBe('index');
+    expect(demotedHome.slug).toBe('home');
+
+    // Exactly one 'index' slug, always at index 0.
+    const indexPages = ctx!.pages.filter((p) => p.slug === 'index');
+    expect(indexPages).toHaveLength(1);
+    expect(ctx!.pages.indexOf(indexPages[0])).toBe(0);
+
+    // movePage does not touch the canvas.
+    expect(deserializeMock).not.toHaveBeenCalled();
+
+    unmount();
+  });
+});
+
+describe('PageContext.setLandingPage', () => {
+  test('promotes an arbitrary page to index 0 and demotes the old landing page', () => {
+    let ctx: ReturnType<typeof usePages> | null = null;
+    const Consumer: React.FC = () => {
+      ctx = usePages();
+      return null;
+    };
+    render(
+      <PageProvider>
+        <Consumer />
+      </PageProvider>,
+    );
+
+    act(() => ctx!.addPage('About', 'about'));
+    act(() => ctx!.addPage('Contact', 'contact'));
+    const homeId = ctx!.pages[0].id;
+    const contactId = ctx!.pages[2].id;
+
+    act(() => ctx!.setLandingPage(contactId));
+
+    expect(ctx!.pages[0].id).toBe(contactId);
+    expect(ctx!.pages[0].slug).toBe('index');
+    const demotedHome = ctx!.pages.find((p) => p.id === homeId)!;
+    expect(demotedHome.slug).toBe('home');
+
+    const indexPages = ctx!.pages.filter((p) => p.slug === 'index');
+    expect(indexPages).toHaveLength(1);
+
+    // setLandingPage does not touch the canvas.
+    expect(deserializeMock).not.toHaveBeenCalled();
+
+    unmount();
+  });
+
+  test('is a no-op when the page is already the landing page', () => {
+    let ctx: ReturnType<typeof usePages> | null = null;
+    const Consumer: React.FC = () => {
+      ctx = usePages();
+      return null;
+    };
+    render(
+      <PageProvider>
+        <Consumer />
+      </PageProvider>,
+    );
+
+    const homeId = ctx!.pages[0].id;
+    const before = ctx!.pages.map((p) => ({ ...p }));
+
+    act(() => ctx!.setLandingPage(homeId));
+
+    expect(ctx!.pages).toEqual(before);
+
+    unmount();
+  });
+});
+
+describe('PageContext.duplicatePage', () => {
+  test('inserts a copy immediately after the source with a copied craftState, seo, and a unique slug', async () => {
+    let ctx: ReturnType<typeof usePages> | null = null;
+    const Consumer: React.FC = () => {
+      ctx = usePages();
+      return null;
+    };
+    render(
+      <PageProvider>
+        <Consumer />
+      </PageProvider>,
+    );
+
+    act(() => ctx!.addPage('About', 'about'));
+    await flushTimers();
+    act(() => ctx!.addPage('Contact', 'contact'));
+    await flushTimers();
+    // pages: [Home, About, Contact]; Contact is currently active.
+
+    const aboutId = ctx!.pages[1].id;
+    act(() => ctx!.updatePageSeo(aboutId, { metaTitle: 'About Us' }));
+
+    act(() => ctx!.duplicatePage(aboutId));
+    await flushTimers();
+
+    const names = ctx!.pages.map((p) => p.name);
+    expect(names).toEqual(['Home', 'About', 'About copy', 'Contact']);
+
+    const copy = ctx!.pages[2];
+    expect(copy.name).toBe('About copy');
+    expect(copy.slug).toBe('about-copy');
+    expect(copy.seo).toEqual({ metaTitle: 'About Us' });
+
+    // Every slug in the array is unique.
+    const slugs = ctx!.pages.map((p) => p.slug);
+    expect(new Set(slugs).size).toBe(slugs.length);
+
+    // Landing invariant untouched -- copy is never index 0.
+    expect(ctx!.pages[0].slug).toBe('index');
+
+    unmount();
+  });
+
+  test('duplicating the ACTIVE page saves the live canvas into the copy (and the original)', async () => {
+    let ctx: ReturnType<typeof usePages> | null = null;
+    const Consumer: React.FC = () => {
+      ctx = usePages();
+      return null;
+    };
+    render(
+      <PageProvider>
+        <Consumer />
+      </PageProvider>,
+    );
+
+    // Home is active by default. Simulate the user having made live edits.
+    serializeReturn = '{"ROOT":{"live":"edit"}}';
+
+    act(() => ctx!.duplicatePage(ctx!.pages[0].id));
+    await flushTimers();
+
+    const copy = ctx!.pages[1];
+    expect(copy.name).toBe('Home copy');
+    expect(copy.craftState).toBe('{"ROOT":{"live":"edit"}}');
+
+    // Original page's stored state was also refreshed to the live canvas.
+    expect(ctx!.pages[0].craftState).toBe('{"ROOT":{"live":"edit"}}');
+
+    // The canvas switched to the new copy.
+    expect(ctx!.activePageId).toBe(copy.id);
+
+    unmount();
+  });
+
+  test('duplicating a non-active page copies its already-stored craftState (no live-canvas read)', async () => {
+    let ctx: ReturnType<typeof usePages> | null = null;
+    const Consumer: React.FC = () => {
+      ctx = usePages();
+      return null;
+    };
+    render(
+      <PageProvider>
+        <Consumer />
+      </PageProvider>,
+    );
+
+    act(() => ctx!.addPage('About', 'about'));
+    await flushTimers();
+    // Home is now inactive, stored with whatever it serialized to on switch.
+    const homeId = ctx!.pages[0].id;
+    const homeCraftState = ctx!.pages[0].craftState;
+
+    // Switch the live serialize() return to something else, to prove
+    // duplicating an inactive page does NOT read the live canvas.
+    serializeReturn = '{"ROOT":{"unrelated":"currently-active-page-content"}}';
+
+    act(() => ctx!.duplicatePage(homeId));
+    await flushTimers();
+
+    const copy = ctx!.pages.find((p) => p.name === 'Home copy')!;
+    expect(copy.craftState).toBe(homeCraftState);
+
+    unmount();
+  });
+
+  test('switches the canvas to the new copy (deserialize called with the copy craftState)', async () => {
+    let ctx: ReturnType<typeof usePages> | null = null;
+    const Consumer: React.FC = () => {
+      ctx = usePages();
+      return null;
+    };
+    render(
+      <PageProvider>
+        <Consumer />
+      </PageProvider>,
+    );
+
+    deserializeMock.mockClear();
+    act(() => ctx!.duplicatePage(ctx!.pages[0].id));
+    await flushTimers();
+
+    expect(deserializeMock).toHaveBeenCalled();
+
+    unmount();
+  });
+});

craft/src/state/PageContext.tsx

@@ -18,6 +18,28 @@ interface PageContextValue {
   addPage: (name: string, slug: string) => void;
   deletePage: (pageId: string) => void;
   renamePage: (pageId: string, name: string, slug: string) => void;
+  /**
+   * Duplicates `pageId`, inserting the copy immediately after the source in
+   * `pages` and switching the canvas to the new copy. If `pageId` is the
+   * active page, its current on-canvas state is saved first so the copy
+   * (and the original) both reflect what's actually on screen. The copy
+   * gets its own unique slug (never `'index'` -- it's never at index 0) and
+   * a name of `"<source name> copy"`; its `seo` is copied from the source.
+   */
+  duplicatePage: (pageId: string) => void;
+  /**
+   * Reorders `pageId` one slot `'up'` or `'down'` within `pages` (swap with
+   * the adjacent page; no-op at either end). Does NOT touch the live
+   * canvas -- only list order changes. Re-applies the landing-page
+   * invariant afterward (see `applyLandingInvariant`) since a reorder can
+   * move a different page into/out of index 0.
+   */
+  movePage: (pageId: string, direction: 'up' | 'down') => void;
+  /**
+   * Moves `pageId` to index 0 (making it the new landing page) and
+   * re-applies the landing-page invariant. Does NOT touch the live canvas.
+   */
+  setLandingPage: (pageId: string) => void;
   /** Merges `seo` fields onto the target page's existing `seo` (creating it if absent). */
   updatePageSeo: (pageId: string, seo: Partial<PageSeo>) => void;
   setHeaderCraftState: (craftState: string) => void;
@@ -188,6 +210,9 @@ const PageContext = createContext<PageContextValue>({
   addPage: () => {},
   deletePage: () => {},
   renamePage: () => {},
+  duplicatePage: () => {},
+  movePage: () => {},
+  setLandingPage: () => {},
   updatePageSeo: () => {},
   setHeaderCraftState: () => {},
   setFooterCraftState: () => {},
@@ -229,6 +254,52 @@ export function uniqueSlug(base: string, existingSlugs: string[]): string {
   return `${base}-${i}`;
 }
 
+/**
+ * Re-establishes the landing-page invariant on a REORDERED pages array: the
+ * page now at index 0 is the landing page and its slug is locked to
+ * `'index'` (regardless of whatever slug it held before it was moved there);
+ * every other page keeps its slug UNLESS it's the page that previously held
+ * `'index'` and has now been demoted to index > 0 -- that page needs a real,
+ * unique slug of its own (derived from its name) since a page can no longer
+ * publish to `index.html` from anywhere but index 0.
+ *
+ * Pure function of the array -- used by both `movePage` (swap two adjacent
+ * pages) and `setLandingPage` (move an arbitrary page to index 0) as the
+ * shared "fix the invariant up after reordering" step, and directly
+ * unit-testable without mounting `PageProvider`.
+ *
+ * Assumes at most one page enters with slug `'index'` (true for any array
+ * that already satisfied the invariant before the reorder that produced this
+ * input) -- exactly the case both callers hand it.
+ */
+export function applyLandingInvariant(pages: PageData[]): PageData[] {
+  if (pages.length === 0) return pages;
+
+  // Slugs that are FIXED and must not be collided into: 'index' (reserved
+  // for whoever ends up at index 0) plus every non-landing page's existing
+  // slug except the demoted page's (it currently holds 'index' and is about
+  // to be given a new one). Computed upfront, over the WHOLE array, so the
+  // demoted page's new slug is checked against every other page regardless
+  // of array order -- checking only "slugs seen so far" while walking the
+  // array would miss a collision against a page that appears LATER in the
+  // list than the demoted one.
+  const fixedSlugs: string[] = ['index'];
+  for (let i = 1; i < pages.length; i++) {
+    if (pages[i].slug !== 'index') fixedSlugs.push(pages[i].slug);
+  }
+
+  return pages.map((page, i) => {
+    if (i === 0) {
+      return page.slug === 'index' ? page : { ...page, slug: 'index' };
+    }
+    if (page.slug === 'index') {
+      // Demoted landing page -- give it a real, unique slug of its own.
+      return { ...page, slug: uniqueSlug(slugify(page.name), fixedSlugs) };
+    }
+    return page;
+  });
+}
+
 const DEFAULT_PAGE: PageData = {
   id: 'home',
   name: 'Home',
@@ -409,6 +480,97 @@ export const PageProvider: React.FC<{ children: ReactNode }> = ({ children }) =>
     [loadState],
   );
 
+  /**
+   * Duplicates `pageId`: inserts a copy immediately after the source in
+   * `pages` and switches the live canvas to it. See the doc comment on
+   * `PageContextValue.duplicatePage`.
+   */
+  const duplicatePage = useCallback(
+    (pageId: string) => {
+      const isActive = pageId === activePageIdRef.current;
+
+      // If the source is the active page, persist its current on-canvas
+      // state back into `pages` first (same as switchPage/addPage do)
+      // so the ORIGINAL page isn't left with a stale craftState after
+      // this. `query.serialize()` below reads the live canvas directly
+      // rather than waiting on this (React state update timing aside,
+      // it's simplest to just ask Craft.js for the truth).
+      if (isActive) {
+        saveCurrentState();
+      }
+
+      const source = pagesRef.current.find((p) => p.id === pageId);
+      if (!source) return;
+
+      const sourceCraftState = isActive ? query.serialize() : source.craftState;
+      const otherSlugs = pagesRef.current.map((p) => p.slug);
+      const copyId = nextPageId();
+      const copyName = `${source.name} copy`;
+      // The copy is always inserted AFTER the source (index >= 1), so it
+      // never needs the reserved 'index' slug -- a normal unique slug always
+      // applies here regardless of whether the source itself is the landing
+      // page.
+      const copySlug = uniqueSlug(slugify(copyName), otherSlugs);
+      const copy: PageData = {
+        id: copyId,
+        name: copyName,
+        slug: copySlug,
+        craftState: sourceCraftState,
+        seo: source.seo ? { ...source.seo } : undefined,
+      };
+
+      setPages((prev) => {
+        const idx = prev.findIndex((p) => p.id === pageId);
+        if (idx === -1) return prev;
+        const next = [...prev];
+        next.splice(idx + 1, 0, copy);
+        return next;
+      });
+
+      // Switch the canvas to the new copy so the user lands on it, same as
+      // addPage switching to the freshly created page.
+      loadState(copy.craftState, EMPTY_CANVAS);
+      setActivePageId(copyId);
+      activePageIdRef.current = copyId;
+    },
+    [query, saveCurrentState, loadState],
+  );
+
+  /**
+   * Reorders `pageId` one slot up or down (swap with the adjacent page).
+   * Pure list-order change -- does not touch the live canvas. See the doc
+   * comment on `PageContextValue.movePage`.
+   */
+  const movePage = useCallback((pageId: string, direction: 'up' | 'down') => {
+    setPages((prev) => {
+      const idx = prev.findIndex((p) => p.id === pageId);
+      if (idx === -1) return prev;
+      const swapIdx = direction === 'up' ? idx - 1 : idx + 1;
+      if (swapIdx < 0 || swapIdx >= prev.length) return prev; // no-op at the ends
+
+      const next = [...prev];
+      [next[idx], next[swapIdx]] = [next[swapIdx], next[idx]];
+      return applyLandingInvariant(next);
+    });
+  }, []);
+
+  /**
+   * Moves `pageId` to index 0, making it the new landing page. Pure list-
+   * order change -- does not touch the live canvas. See the doc comment on
+   * `PageContextValue.setLandingPage`.
+   */
+  const setLandingPage = useCallback((pageId: string) => {
+    setPages((prev) => {
+      const idx = prev.findIndex((p) => p.id === pageId);
+      if (idx <= 0) return prev; // already the landing page, or not found
+
+      const next = [...prev];
+      const [moved] = next.splice(idx, 1);
+      next.unshift(moved);
+      return applyLandingInvariant(next);
+    });
+  }, []);
+
   const renamePage = useCallback((pageId: string, name: string, slug: string) => {
     setPages((prev) =>
       prev.map((p, i) => {
@@ -556,6 +718,9 @@ export const PageProvider: React.FC<{ children: ReactNode }> = ({ children }) =>
         addPage,
         deletePage,
         renamePage,
+        duplicatePage,
+        movePage,
+        setLandingPage,
         updatePageSeo,
         setHeaderCraftState,
         setFooterCraftState,

craft/src/test-utils/integration/duplicate-paste.integration.test.tsx

@@ -3,7 +3,7 @@ import React from 'react';
 import { renderEditorHarness, EditorHarness } from '../editorHarness';
 import { useNodeActions, NodeActions } from '../../hooks/useNodeActions';
 import { useKeyboardShortcuts } from '../../hooks/useKeyboardShortcuts';
-import { getClipboardNodeId, setClipboardNodeId } from '../../hooks/clipboard';
+import { getClipboardTree, setClipboardTree } from '../../hooks/clipboard';
 
 /**
  * Real-`@craftjs/core` integration coverage for duplicate/paste.
@@ -67,10 +67,39 @@ const INITIAL_STATE = JSON.stringify({
   },
 });
 
+// A second, independent "page" state -- distinct node ids from INITIAL_STATE,
+// simulating what PageContext.switchPage does: `query.serialize()` the
+// current page, then `actions.deserialize()` the target page's stored
+// state, replacing the ENTIRE node map. `social-1` (copied from page A)
+// does not exist anywhere in this state.
+const PAGE_B_STATE = JSON.stringify({
+  ROOT: {
+    type: { resolvedName: 'Container' },
+    isCanvas: true,
+    props: { style: {}, tag: 'div' },
+    displayName: 'Container',
+    custom: {},
+    hidden: false,
+    nodes: ['page-b-heading-1'],
+    linkedNodes: {},
+  },
+  'page-b-heading-1': {
+    type: { resolvedName: 'Heading' },
+    isCanvas: false,
+    props: { text: 'Page B Heading', level: 'h2' },
+    displayName: 'Heading',
+    custom: {},
+    hidden: false,
+    parent: 'ROOT',
+    nodes: [],
+    linkedNodes: {},
+  },
+});
+
 let harness: EditorHarness | null = null;
 
 afterEach(() => {
-  setClipboardNodeId(null);
+  setClipboardTree(null);
   if (harness) {
     harness.unmount();
     harness = null;
@@ -158,7 +187,7 @@ describe('duplicate/paste (real @craftjs/core editor)', () => {
         new KeyboardEvent('keydown', { key: 'c', ctrlKey: true, bubbles: true, cancelable: true }),
       );
     });
-    expect(getClipboardNodeId()).toBe('social-1');
+    expect(getClipboardTree()!.rootNodeId).toBe('social-1');
 
     // Select heading-1 (a sibling), then paste -- should land as a sibling
     // of heading-1's parent (ROOT), with brand-new ids.
@@ -190,4 +219,76 @@ describe('duplicate/paste (real @craftjs/core editor)', () => {
     expect(pastedProps.links).not.toBe(originalProps.links);
     expect(pastedProps).toEqual(originalProps);
   });
+
+  test('CROSS-PAGE copy/paste: copy on page A, switch to page B, paste -- the node appears on page B', () => {
+    harness = renderEditorHarness({ initialState: INITIAL_STATE });
+
+    const Consumer: React.FC = () => {
+      useKeyboardShortcuts();
+      return null;
+    };
+    harness.mountChild(<Consumer />);
+
+    // --- Page A: select + copy social-1. ---
+    harness.act(() => {
+      harness!.actions.selectNode('social-1');
+    });
+    harness.act(() => {
+      document.dispatchEvent(
+        new KeyboardEvent('keydown', { key: 'c', ctrlKey: true, bubbles: true, cancelable: true }),
+      );
+    });
+    expect(getClipboardTree()!.rootNodeId).toBe('social-1');
+
+    // --- Switch to page B: exactly what PageContext.switchPage does --
+    // serialize (discarded here, a real page switch would stash it) then
+    // deserialize the target page's state, replacing the ENTIRE node map.
+    // `social-1` no longer exists anywhere in `query` after this. ---
+    harness.act(() => {
+      harness!.actions.deserialize(PAGE_B_STATE);
+    });
+    expect(harness.query.getNodes()['social-1']).toBeUndefined();
+
+    // Select page B's only node, then paste.
+    harness.act(() => {
+      harness!.actions.selectNode('page-b-heading-1');
+    });
+
+    const beforePaste = Object.keys(harness.query.getNodes());
+    expect(() => {
+      harness!.act(() => {
+        document.dispatchEvent(
+          new KeyboardEvent('keydown', { key: 'v', ctrlKey: true, bubbles: true, cancelable: true }),
+        );
+      });
+    }).not.toThrow();
+
+    const afterPaste = Object.keys(harness.query.getNodes());
+
+    // The regression this guards against: with the old id-based clipboard,
+    // `query.node('social-1').get()` returns undefined once page B is
+    // loaded, so the paste handler's guard silently no-ops -- NOTHING gets
+    // added. With the tree-snapshot clipboard, the copied subtree is
+    // detached from any live query and pastes onto page B regardless.
+    expect(afterPaste.length).toBe(beforePaste.length + 1);
+
+    const pastedId = afterPaste.find((id) => !beforePaste.includes(id))!;
+    expect(pastedId).toBeDefined();
+
+    const pastedNode = harness.query.node(pastedId).get();
+    expect(pastedNode.data.displayName).toBe('Social Links');
+    expect(pastedNode.data.props.links).toEqual([
+      { platform: 'facebook', url: 'https://facebook.com/original' },
+    ]);
+
+    // Actually landed on page B's tree, as a sibling of the selected node.
+    const rootChildren: string[] = harness.query.node('ROOT').get().data.nodes;
+    expect(rootChildren).toContain(pastedId);
+
+    // Real DOM assertion: the pasted SocialLinks component is actually
+    // rendered on the (now page B) canvas.
+    expect(
+      harness.container.querySelectorAll('a[href="https://facebook.com/original"]'),
+    ).toHaveLength(1);
+  });
 });