fix: render task checkboxes as atomic editor tokens

README.md

@@ -139,9 +139,9 @@ Search for **Conjure Notes**, identified by its centered 📔 icon, or assign it
 
 Actions opens the same searchable popup style used throughout Conjure, with **Browse Notes** (Command-P) and **New Note** (Command-N). Command-N creates a note while the editor or either popup is focused. Command-P toggles Browse Notes even while its footer pill is covered. Escape, Back, or clicking outside closes an open popup and returns focus to the editor without leaving Notes; another Escape dismisses the launcher. Control-J/K navigates only while a popup is open, preserving normal editor commands when it is closed.
 
-Edit Markdown directly: headings, bold, italic, lists, links, inline code, and fenced code blocks are highlighted while the source remains visible. Paste images or drag image files into the editor to embed them locally; no file-picker button is needed. Return continues bullet (`-`, `*`, `+`), numbered (`1.`, `1)`), and task lists at the same indentation, incrementing numbers and resetting task checkboxes. On an empty item, Return exits one nesting level; repeat to leave the list entirely. Nesting has no fixed depth limit. Prose and fenced code retain ordinary newlines. Command-Z undoes edits; Command-Shift-Z redoes them. Undo history is cleared when switching notes so edits cannot spill into another note.
+Edit Markdown directly: headings, bold, italic, lists, links, inline code, and fenced code blocks are highlighted while the source remains visible, except for task markers rendered as checkbox tokens. Paste images or drag image files into the editor to embed them locally; no file-picker button is needed. Return continues bullet (`-`, `*`, `+`), numbered (`1.`, `1)`), and task lists at the same indentation, incrementing numbers and resetting task checkboxes. On an empty item, Return exits one nesting level; repeat to leave the list entirely. Nesting has no fixed depth limit. Prose and fenced code retain ordinary newlines. Command-Z undoes edits; Command-Shift-Z redoes them. Undo history is cleared when switching notes so edits cannot spill into another note.
 
-Task-list markers such as `- [ ]` and `- [x]` display as native checkboxes, including nested tasks. Click a checkbox to toggle completion; toggles autosave and support Undo/Redo without moving the text selection. The original Markdown remains in saved notes and copied text, rather than being replaced with image attachments. Task syntax inside fenced code or ordinary prose stays literal.
+Task-list markers such as `- [ ]` and `- [x]` display as atomic inline native checkboxes, including nested tasks. Indentation and following whitespace remain editable text; selecting a checkbox selects the whole marker, with no hidden source characters. Click to toggle completion without moving the selection. Backspace immediately after a checkbox expands its original marker and deletes its final character; forward Delete immediately before it expands the marker and deletes its first character. Each edit is one Undo step. Removing a task’s preceding newline after prose makes its marker literal inline text; joining onto an empty or indentation-only line keeps a valid checkbox. Saved notes and copied text retain the original Markdown spelling, case, and spacing, alongside embedded images. Task syntax inside fenced code or ordinary prose stays literal.
 
 Fenced code uses [HighlighterSwift](https://github.com/smittytone/HighlighterSwift) (Highlight.js) for language-aware token colors. Add a language after the opening backticks or tildes, for example `py`, `python`, `swift`, `js`, or `json`. Unlabeled fences use automatic detection; unknown languages remain plain monospace. Highlighting runs entirely offline.