- import `notionJsonToBlocks` in `Block.client.js` and prioritize `text/_notion-blocks-v3-production` mime over `text/html` on paste
- implement `notionJsonToBlocks` and `notionValueToBlock` in `clipboard.js` to convert notion block json to editor blocks, preserving native types (`to_do`, `sub_sub_header`, etc.)
- update README to document the notion mime priority in paste handling
- detect `to-do-list` (Notion) and `task-list` (GitHub MD) classes as checklist containers
- handle notion `<div class="checkbox-on/off">` as checkbox indicator in list items
- update README to document newly recognized HTML tags for checklist input
- introduce `BlockInsertMenu` dropdown to insert a new block after the current one
- extract `TYPE_ICON_BOX_CLASS` constant shared between insert menu and transform menu
- align `BlockActionsMenu` transform list item padding/gap to match new insert menu style
- update README to document the new insert menu behaviour and enabled blocks filtering
- add `BlockMenuTransformItem` component with hover-triggered submenu panel
- import `ArrowRight01Icon` and `TextIcon` icons for transform UI
- track drag state via `justDraggedRef` to prevent menu opening after drag
- expose `close` from `<Menu>` render prop to allow manual close on transform select
- wire transform options from block registry into the new submenu item
- add context menu on drag handle with transform, duplicate and delete actions
- introduce `MenuOpenSync` helper to keep handle visible while menu is open
- pass `onTransformBlock`, `onDuplicateBlock`, `onDeleteBlock` and `enabledBlocks` props to Block
- compute `transformOptions` via `useMemo` filtering allowed text block types
- update BlockEditor to wire new block action handlers down to each Block
- update README to document new block action props and menu behavior
- add clipboard.js with htmlToBlocks, blocksToHtml, and blocksToPlainText helpers
- handle single-paragraph html paste as inline splice preserving block type
- handle multi-block html paste by splitting current block and merging head/tail paragraphs
- add onPasteInline and onPasteBlocks props to Block component
- implement handlePasteInline and handlePasteBlocks in BlockEditor
- fallback to plain text insertion when html is absent or yields no blocks
- update README to document clipboard behaviour and new paste handlers
- add `removeAllMarks` function to inline/types.js
- implement `applyRemoveAllMarks` handler in BlockEditor client
- add `TextClearIcon` button with separator in Toolbar component
- expose `onClearMarks` prop on InlineToolbar
- update README to document new clear formatting action
- update blockRegistry to accept ReactNode icons instead of emoji strings
- replace emoji icons in all built-in block types with icon components from shared icons
- add `isHexColor` and `collectUsedColors` helpers to inline/types.js
- extend `color` and `highlight` marks to accept hex color strings in addition to palette keys
- pass `usedColors` (collected from document) to InlineToolbar
- update InlineToolbar color popover to show used colors and a free color input
- add new icons to shared icons index
- update README to reflect icon, color, and toolbar popover changes
- migrate block content from plain strings to InlineNode[] structure
- add inline toolbar (bold, italic, code, color, link) on text selection
- add checklist block type with toggle support
- add image block type (URL-based, phase 2)
- add inline serialization helpers (inlineToDom, domToInline)
- add inline types and length utilities
- extend caret utils with range get/set support
- update block registry and all existing block types for new content model
- update demo blocks in ComponentsPage to use rich inline content
- update README to reflect new architecture
- swap PlusSignIcon for Add01Icon in Block.client.js add button
- remove PlusSignIcon export from shared icons index
- update README to reflect renamed icon
- replace `+` and `⋮⋮` text with `PlusSignIcon` and `DragDropVerticalIcon` components
- add `Add01Icon` export to shared icons index
- update README to reference icon names and link to icons source
- add `isSelected` prop and overlay highlight to Block component
- implement double ctrl+a: first selects block content, second selects all blocks
- add `onSelectAllBlocks` callback prop to Block
- add `selectedBlockIds` state and `selectAllBlocks`/`deleteSelectedBlocks` helpers in BlockEditor
- detect cross-block native selection via `selectionchange` and convert to block selection
- handle backspace/delete key to remove all selected blocks
- clear block selection on click outside or focus change
- update README to document multi-block selection behaviour
- export new icons used by the feature
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