Changelog

New feature: Ctrl+Tab indents the entire block (any type), Ctrl+Shift+Tab

outdents. Range 0–5 levels, 24px per level applied as left margin on

the BlockWrapper's outer border.

Model:

• Add IndentLevel property to PageBlock (serialized as "block_indent",

omitted when 0, clamped to 0–5 on read)

Serialization:

• PageBlockConverter.Read: parse "block_indent" from JSON
• PageBlockConverter.Write: emit "block_indent" when > 0

View:

• NotesView.OnKeyDown: Ctrl+Tab increments IndentLevel on the

top-level block, Ctrl+Shift+Tab decrements. Uses FindTopLevelBlock

to resolve the correct block even inside nested containers.

• Add FindParentOfType<T> helper for visual tree traversal

BlockWrapper:

• ApplyBlockIndentMargin: sets left margin on _outerBorder based on

PageBlock.IndentLevel, called on both OnLoaded and OnDataContextChanged

This is independent of ParagraphBlock.IndentLevel (Tab indent) which

applies a separate margin inside the block wrapper. Both can coexist.

When "/" is typed inside a blockquote (or callout/group), FindParentBlock

returns the inner child PageBlock which isn't in CurrentBlocks, causing

IndexOf to return -1. The slash insert index falls back to stale

_savedBlockIndex, placing the new block at the wrong position.

Add FindTopLevelBlock helper that walks up the visual tree and returns

the first PageBlock found in CurrentBlocks. For nested containers, this

correctly resolves to the outer blockquote/callout block. For regular

blocks, it behaves identically to FindParentBlock.

The slash handler now uses FindTopLevelBlock instead of FindParentBlock

for index resolution.

Group block removal:

• Remove group from the block type picker, command routing, and

CreateBlockFromTypeId factory

• Remove AddGroupBlock command and GroupSelectedBlocks multi-select action
• Remove "Group Selected" context menu item from BlockWrapper
• Keep GroupBlock model, deserializer, and renderer for backwards

compatibility with existing pages that contain group blocks

Definition list Enter key + auto-focus:

• Add Enter key handler to DefinitionListEditor — pressing Enter in a

term TextBox inserts a new definition under that term; pressing Enter

in a definition TextBox inserts a new definition after it

• Tag each TextBox with (ItemIndex, DefIndex) tuple to identify its

position in the definition list model

• Add _pendingFocusIndex mechanism: set before RebuildItems(), applied

after rebuild via Dispatcher.Post at Loaded priority

• "Add term" and "Add definition" buttons now auto-focus the newly

created TextBox after rebuild

Slash command ("/"):

• Capture the source block index at "/" time into _slashBlockIndex,

independent of _savedBlockIndex which can become stale during debounce

• Pass the captured index to the VM via SetSlashInsertIndex() before

opening the block picker

• InsertBlockAtSelection now checks _slashInsertIndex first (highest

priority), then _savedBlockIndex, then SelectedBlockIndex

• Reduce slash debounce from 500ms to 250ms for snappier response

"+" Add block button:

• ToggleBlockPicker now calls ClearBlockSelection() before opening,

ensuring _savedBlockIndex = -1 and SelectedBlockIndex = -1

• This makes InsertBlockAtSelection fall through to the append-at-end

branch, which is the expected behavior for the bottom-of-page button

Auto-focus after insertion:

• ScrollToBlock now retries up to 2 times instead of 1 — first at

Loaded priority, then at Background priority

• The lower Background priority gives the visual tree more time to

materialize inner controls in virtualized ItemsControl containers

The ChildBlocksHost ItemsControl in BlockWrapper.axaml had a bare

ContentControl with no DataTemplates registered, so any block nested

as a child (via tree indentation or GroupBlock) would fall through to

ToString() rendering — showing raw type names like

"DefinitionListBlock { Type = definition_list, Items = ... }".

Replace the inline template-less AXAML DataTemplate with

BlockTemplateFactory.CreateBlockTemplate() set in code-behind,

which provides the full set of block content DataTemplates for all

block types including proper editor controls, Loaded/Unloaded wiring,

and drag handle support.