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+---
+name: dpage-editor
+description: Guides development in the dpage-editor React/Konva catalogue editor and HTML flip-book viewer. Use when editing editor tools, viewer rendering, Zustand store, catalogue autosave, entrance animations, masks, or any code under src/pages/editor or src/pages/viewer.
+---
+
+# dpage-editor
+
+## Stack
+
+- React 19 + TypeScript + Vite
+- Canvas editor: **Konva** / **react-konva**
+- Viewer: **react-pageflip** (HTML/CSS, not Konva)
+- State: **Zustand** (`editorStore`)
+- Data: **TanStack Query** + axios services
+- Styling: **Tailwind CSS 4**, `clx()` from `@/helpers/utils`
+- i18n: react-i18next (Persian UI)
+
+## Architecture
+
+| Area | Path | Role |
+|------|------|------|
+| Editor page | `src/pages/editor/Editor.tsx` | Loads catalogue, autosave, Konva lifecycle |
+| Editor store | `src/pages/editor/store/editorStore.ts` | Pages, objects, undo, selection |
+| Object types | `src/pages/editor/store/editorStore.types.ts` | `EditorObject`, `ToolType`, animations |
+| Canvas | `src/pages/editor/components/canvas/` | Layers, drawing, transform, snap |
+| Tools (Konva) | `src/pages/editor/components/tools/` | One component per shape/media type |
+| Sidebar | `src/pages/editor/components/sidebar/` | ToolsBar, settings, instructions |
+| Viewer | `src/pages/viewer/` | Flip-book, entrance animations, magnifier |
+| Book render | `src/pages/viewer/components/BookPage.tsx` | HTML mirror of `EditorObject` |
+| Catalogue API | `src/pages/catalogue/hooks/useCatalogueData.ts` | Load/save `content` JSON |
+
+**Source of truth:** `EditorObject[]` per page, serialized into catalogue `content`. Editor and viewer must stay in sync.
+
+## Critical conventions
+
+### Konva text rendering
+
+In `Editor.tsx`, `Konva.legacyTextRendering = true` is required. Konva 10's new text baseline breaks transformer bounds for Persian/Latin text. Do not remove without fixing text measurement.
+
+### Store sync
+
+`objects` and `pages[currentPageId].objects` must stay synced. Use existing helpers (`withSyncedCurrentPageObjects`, store actions) — never update one without the other.
+
+### IDs and cloning
+
+- Use `createScopedId` / helpers in `editorStore.helpers.ts` for new IDs.
+- Undo history uses `structuredClone` on object lists; new fields on `EditorObject` must be JSON-serializable.
+
+### Path alias
+
+Use `@/` imports (e.g. `@/pages/editor/store/editorStore`).
+
+## Adding or changing a tool type
+
+Checklist — touch all relevant layers:
+
+1. **`ToolType`** in `editorStore.types.ts` — add union member + fields on `EditorObject` if needed.
+2. **Konva shape** — `src/pages/editor/components/tools/<Name>Shape.tsx`, export from `tools/index.ts`.
+3. **`ObjectRenderer.tsx`** — `switch (obj.type)` case + props wiring.
+4. **Sidebar** — `ToolsBar.tsx`, `ToolInstructions.tsx`, optional `instructions/` + `settings/`.
+5. **Creation defaults** — store action or drawing handler that sets initial `x`, `y`, `width`, `height`.
+6. **Viewer** — `BookPage.tsx` `renderObject` branch; reuse utils from `src/pages/editor/utils/` (gradient, fontFamily, textStyle, customShape).
+7. **Entrance animation** (if applicable) — `entranceAnimations.css`, `entranceAnimationStyle.ts`, `useBookEntranceController.ts`.
+
+Default tool prop pattern:
+
+```typescript
+type ShapeProps = {
+  obj: EditorObject;
+  isSelected: boolean;
+  transformerRef: React.RefObject<Konva.Transformer | null>;
+  onSelect: (id: string, node: Konva.Node, e?: Konva.KonvaEventObject<MouseEvent>) => void;
+  onUpdate: (id: string, updates: Partial<EditorObject>) => void;
+  draggable: boolean;
+};
+```
+
+## Editor vs viewer
+
+| Concern | Editor | Viewer |
+|---------|--------|--------|
+| Rendering | Konva nodes | HTML/CSS (`BookPage`) |
+| Interaction | Select, transform, draw | Flip pages, links, autoplay |
+| Scale | Stage zoom | `VIEWER_SCALE` + viewport hooks |
+| Media | Full controls in sidebar | `staticMedia` option for thumbnails |
+| RTL | Stage coordinates | `RTL_COVER_PAD_PAGE_ID` for odd page counts |
+
+Viewer-specific logic belongs in `src/pages/viewer/hooks/` and `utils/`, not in editor components.
+
+## Autosave (Editor.tsx)
+
+- `useUpdateCatalog` debounces saves.
+- On catalogue `id` change: `cancelPendingUpdate`, `resetEditor`, reload once per id (`loadedCatalogIdRef`).
+- Skip first autosave after load (`skipNextAutosaveRef`).
+
+## Code style for this repo
+
+- Prefer extending existing components over new abstractions.
+- Keep comments for non-obvious Konva/RTL/safari workarounds (see `BookViewer.tsx`, `Editor.tsx`).
+- Match Persian UI strings in surrounding files.
+- Minimize diff scope; do not refactor unrelated editor/viewer code.
+- Run `npm run build` after substantive changes (strict TypeScript).
+
+## Common pitfalls
+
+- Adding an `EditorObject` field but forgetting viewer render → object invisible in preview.
+- Transform commits: use `transformCommit.ts` patterns so scale/rotation persist correctly.
+- Mask/group: check `groupId`, `maskId`, `isMask` in both editor layers and `maskStyle.ts`.
+- Page background: editor `documentSettings` ↔ viewer `resolvePageBackground`.
+- Fullscreen/viewer chrome: `isViewerPath` hides app header/sidebar in `MainRouter.tsx`.
+
+## Key routes
+
+- Editor: `/editor/:id`
+- Viewer: `/viewer/:id` or `/viewer/:businessSlug/:slug`
+- Catalogue list: see `src/config/Paths.ts`