docs: Add CLAUDE.md documentation for Tiptap RTE

src/Umbraco.Web.UI.Client/src/packages/tiptap/CLAUDE.md

@@ -0,0 +1,302 @@
+# Umbraco Tiptap package - @umbraco-cms/backoffice/tiptap
+
+[Umbraco Backoffice](../../../CLAUDE.md) | [Umbraco CMS Root](../../../../../CLAUDE.md)
+
+---
+
+## Overview
+
+Extensible rich text editor (RTE) framework for the Umbraco CMS backoffice. Built on **Tiptap v3** (based on ProseMirror), this package provides a plugin architecture with 50+ built-in extensions for content editing.
+
+**Package**: `@umbraco-cms/backoffice/tiptap`
+**Name**: `Umbraco.Core.Tiptap`
+
+### External Resources
+
+- **Tiptap**: [tiptap.dev](https://tiptap.dev/) | [Documentation](https://tiptap.dev/docs) | [Source](https://github.com/ueberdosis/tiptap/)
+- **ProseMirror** (underlying framework): [prosemirror.net](https://prosemirror.net/) | [Documentation](https://prosemirror.net/docs/) | [Source](https://github.com/ProseMirror/prosemirror)
+
+---
+
+## Directory Structure
+
+```
+tiptap/
+├── components/                            # UI components
+│   ├── input-tiptap/                      # Main editor component (`umb-input-tiptap`)
+│   ├── toolbar/                           # Editor toolbar (`umb-tiptap-toolbar`)
+│   ├── statusbar/                         # Editor status bar (`umb-tiptap-statusbar`)
+│   ├── menu/                              # Menu system (`umb-tiptap-menu`)
+│   └── cascading-menu-popover/            # Nested menu UI (`umb-cascading-menu-popover`)
+├── contexts/                              # Context API
+│   └── tiptap-rte.context.ts              # Shared editor context (`UMB_TIPTAP_RTE_CONTEXT`)
+├── extensions/                            # 50+ editor extensions
+│   ├── tiptap-extension-api-base.ts       # Base class for extensions
+│   ├── tiptap-toolbar-element-api-base.ts # Base class for toolbar actions
+│   ├── types.ts                           # API interfaces
+│   ├── manifests.ts                       # Aggregated extension manifests
+│   └── [extension-name]/                  # Individual extensions
+│       ├── {name}.tiptap-api.ts           # Extension API
+│       ├── {name}.tiptap-extension.ts     # Custom Tiptap extension (if needed)
+│       ├── {name}.tiptap-statusbar-api.ts # Statusbar action API
+│       ├── {name}.tiptap-toolbar-api.ts   # Toolbar action API
+│       └── manifests.ts                   # Extension manifests
+├── property-editors/                      # Property editor configurations
+│   ├── tiptap-rte/                        # Main RTE property editor UI
+│   ├── extensions-configuration/          # Capabilities/extension picker
+│   ├── toolbar-configuration/             # Toolbar layout builder
+│   └── statusbar-configuration/           # Statusbar layout builder
+├── constants.ts                           # Aggregated exported constants
+├── externals.ts                           # Tiptap library re-exports
+├── index.ts                               # Aggregated exports
+├── manifests.ts                           # Root manifest registry
+├── type.ts                                # Aggregated type exports
+└── umbraco-package.ts                     # Package metadata
+```
+
+---
+
+## Extension Architecture
+
+### Extension Types
+
+| Type                    | Manifest Type              | Purpose                                               |
+| ----------------------- | -------------------------- | ----------------------------------------------------- |
+| **Tiptap Extension**    | `tiptapExtension`          | Registers editor capabilities (marks, nodes, plugins) |
+| **Toolbar Extension**   | `tiptapToolbarExtension`   | UI actions in the toolbar                             |
+| **Statusbar Extension** | `tiptapStatusbarExtension` | Status/metadata display                               |
+
+### Base Classes
+
+**`UmbTiptapExtensionApiBase`** - For editor extensions:
+
+```typescript
+export default class UmbTiptapMyExtensionApi extends UmbTiptapExtensionApiBase {
+	getTiptapExtensions = () => [MyTiptapExtension];
+
+	// Optional: provide custom CSS for the extension
+	override getStyles = () => css`
+		/* styles */
+	`;
+}
+```
+
+**`UmbTiptapToolbarElementApiBase`** - For toolbar actions:
+
+```typescript
+export default class UmbTiptapMyToolbarApi extends UmbTiptapToolbarElementApiBase {
+	override execute(editor?: Editor) {
+		editor?.chain().focus().toggleBold().run();
+	}
+
+	// Optional: override active/disabled state
+	override isActive(editor?: Editor): boolean { ... }
+	override isDisabled(editor?: Editor): boolean { ... }
+}
+```
+
+### Toolbar Button Kinds
+
+Four built-in kinds for toolbar extensions:
+
+- `button` - Standard toolbar button
+- `colorPickerButton` - Color picker button
+- `menu` - Dropdown menu
+- `styleMenu` - Style selector dropdown
+
+---
+
+## File Naming Conventions
+
+| File Pattern                         | Purpose                     |
+| ------------------------------------ | --------------------------- |
+| `{name}.tiptap-api.ts`               | Extension API class         |
+| `{name}.tiptap-extension.ts`         | Custom Tiptap extension     |
+| `{name}.tiptap-toolbar-api.ts`       | Toolbar action API          |
+| `{name}.tiptap-toolbar-element.ts`   | Toolbar UI element          |
+| `{name}.tiptap-statusbar-api.ts`     | Statusbar action API        |
+| `{name}.tiptap-statusbar-element.ts` | Statusbar UI element        |
+| `manifests.ts`                       | Extension manifest registry |
+
+---
+
+## Creating Extensions
+
+### Simple Extension (e.g., Bold)
+
+```typescript
+// bold.tiptap-api.ts
+import { Bold } from '../../externals.js';
+import { UmbTiptapExtensionApiBase } from '../tiptap-extension-api-base.js';
+
+export default class UmbTiptapBoldExtensionApi extends UmbTiptapExtensionApiBase {
+	getTiptapExtensions = () => [Bold];
+}
+
+// bold.tiptap-toolbar-api.ts
+import { UmbTiptapToolbarElementApiBase } from '../tiptap-toolbar-element-api-base.js';
+import type { Editor } from '../../externals.js';
+
+export default class UmbTiptapBoldToolbarApi extends UmbTiptapToolbarElementApiBase {
+	override execute(editor?: Editor) {
+		editor?.chain().focus().toggleBold().run();
+	}
+}
+
+// manifests.ts
+export const manifests: Array<UmbExtensionManifest> = [
+	{
+		type: 'tiptapExtension',
+		alias: 'Umb.Tiptap.Bold',
+		name: 'Bold Tiptap Extension',
+		api: () => import('./bold.tiptap-api.js'),
+		meta: {
+			icon: 'icon-bold',
+			label: 'Bold',
+			group: '#tiptap_extGroup_formatting',
+		},
+	},
+	{
+		type: 'tiptapToolbarExtension',
+		kind: 'button',
+		alias: 'Umb.Tiptap.Toolbar.Bold',
+		name: 'Bold Tiptap Toolbar Extension',
+		api: () => import('./bold.tiptap-toolbar-api.js'),
+		forExtensions: ['Umb.Tiptap.Bold'],
+		meta: {
+			alias: 'bold',
+			icon: 'icon-bold',
+			label: '#buttons_bold',
+		},
+	},
+];
+```
+
+### Extension with Custom Styles
+
+Override `getStyles()` to inject CSS into the editor's Shadow DOM:
+
+```typescript
+export default class UmbTiptapTableExtensionApi extends UmbTiptapExtensionApiBase {
+	getTiptapExtensions = () => [Table, TableRow, TableHeader, TableCell];
+
+	override getStyles = () => css`
+		table {
+			border-collapse: collapse;
+			width: 100%;
+		}
+		td,
+		th {
+			border: 1px solid var(--uui-color-border);
+			padding: 0.5rem;
+		}
+	`;
+}
+```
+
+### Extension with Modal Dialog
+
+Use `UMB_MODAL_MANAGER_CONTEXT` for dialogs:
+
+```typescript
+export default class UmbTiptapLinkToolbarApi extends UmbTiptapToolbarElementApiBase {
+	override async execute(editor?: Editor) {
+		const modalManager = await this.getContext(UMB_MODAL_MANAGER_CONTEXT);
+		const modal = modalManager.open(this, UMB_LINK_PICKER_MODAL, { data: { ... } });
+		const result = await modal.onSubmit();
+		editor?.chain().setLink({ href: result.url }).run();
+	}
+}
+```
+
+---
+
+## Key Components
+
+### Main Editor (`umb-input-tiptap`)
+
+The primary editor component with:
+
+- Dynamic extension loading based on configuration
+- Toolbar and statusbar rendering
+- Shadow DOM scoping with custom stylesheets
+- Form control with validation support
+- Read-only mode
+
+**Properties**:
+
+- `value: string` - HTML content
+- `configuration: UmbPropertyEditorConfigCollection` - Editor configuration
+- `label: string` - Accessibility label
+- `readonly: boolean` - Read-only mode
+- `required: boolean` - Validation flag
+
+### Editor Context (`UMB_TIPTAP_RTE_CONTEXT`)
+
+Shares the Tiptap Editor instance across the component tree:
+
+```typescript
+this.consumeContext(UMB_TIPTAP_RTE_CONTEXT, (context) => {
+	const editor = context.getEditor();
+});
+```
+
+---
+
+## Configuration
+
+The editor is configured via `UmbPropertyEditorConfigCollection`:
+
+| Key           | Type                      | Description                                  |
+| ------------- | ------------------------- | -------------------------------------------- |
+| `extensions`  | `Array<string>`           | Enabled extension aliases                    |
+| `toolbar`     | `UmbTiptapToolbarValue`   | Toolbar layout (3D array: rows/groups/items) |
+| `statusbar`   | `UmbTiptapStatusbarValue` | Statusbar layout (2D array: sections/items)  |
+| `stylesheets` | `Array<string>`           | Custom CSS URLs                              |
+
+---
+
+## Important Notes
+
+### Core Extension
+
+`Umb.Tiptap.RichTextEssentials` is always enabled and provides:
+
+- Document, Paragraph, Text, HardBreak
+- Dropcursor, Gapcursor
+- Undo/Redo
+
+### Tiptap Library Imports
+
+Always import Tiptap types and extensions from `externals.ts`:
+
+```typescript
+// Correct
+import { Bold, Editor } from '../../externals.js';
+import type { Extension } from '../../externals.js';
+
+// Incorrect - bypasses project configuration
+import { Bold } from '@tiptap/extension-bold';
+```
+
+### Shadow DOM Scoping
+
+Custom CSS is injected via `<style>` tags (not Tiptap's `injectCSS` option) to work with Shadow DOM encapsulation.
+
+### Debounced Updates
+
+Toolbar and statusbar re-renders are debounced at 100ms to prevent excessive updates during rapid editing.
+
+---
+
+## Quick Reference
+
+| Item                 | Path/Value                                        |
+| -------------------- | ------------------------------------------------- |
+| Main component       | `components/input-tiptap/input-tiptap.element.ts` |
+| Extension base class | `extensions/tiptap-extension-api-base.ts`         |
+| Toolbar base class   | `extensions/tiptap-toolbar-element-api-base.ts`   |
+| Context token        | `UMB_TIPTAP_RTE_CONTEXT`                          |
+| Tiptap imports       | `externals.ts`                                    |
+| All manifests        | `extensions/manifests.ts`                         |
+| Bundle alias         | `Umb.Bundle.Tiptap`                               |

src/Umbraco.Web.UI.Client/src/packages/tiptap/umbraco-package.ts

@@ -2,7 +2,7 @@ export const name = 'Umbraco.Core.Tiptap';
 export const extensions = [
 	{
 		name: 'Tiptap Bundle',
-		alias: 'Umb.Bundle.tiptap',
+		alias: 'Umb.Bundle.Tiptap',
 		type: 'bundle',
 		js: () => import('./manifests.js'),
 	},