- [x] conjure notes:
    - [x] window should be resizable (and set size should be remembered)
    - [x] make font for note/input text monospaced
- [x] bug: looks like dragging around the conjure windows can cause other conjure windows of difference window sizes to spawn offset the corner instead of from the center of the windows
    - when moving a conjure window, the saved position should always be the center of the window, and windows should always be spawned at some position taking to mean their center.
    - this should keep window placement invariant of corner window sizes
- [x] conjure notes:
    - [x] add action to delete a note (currently selected note)
    - [x] make images have rounded corners
    - [x] bug: text flashes when inserting characters, which is visually disturbing.
    - [x] fix heading editing using paragraph semantics:
        - typing `#{1,6} ` at the visible paragraph start sets the absolute heading level, replacing any existing level; fenced code remains literal.
        - Backspace at heading start deletes the preceding newline, not the heading prefix; at document start it does nothing.
        - joining onto nonempty prose inherits the preceding paragraph's type: `Text\n## Heading` becomes `TextHeading`; removing an empty line above preserves the heading.
        - keep native attributed-text editing, Undo, images, Markdown export, and RTFD autosaves; structured paragraph metadata is stored alongside RTFD content.
    - [x] add whole-note Markdown export actions to the Notes Actions menu:
        - Copy as Markdown: replace images with inline-code placeholders such as `<photo.png>`.
        - Export as Markdown…: save a single `.md` file without images; with images, create a folder containing the Markdown and image files, using relative links.
        - exports leave the original note and RTFD autosaves unchanged.
    - [x] bug: pressing backspace at the start of a heading will move it back a line (as expected), but a subsequent return will cause the heading `#`s to appear on the first and the heading text to move down a line.
        - [x] keep the caret on the heading's visible line after Backspace and Return, not on the preceding line.
    - [x] improve:
        - add cmd+shift+s for strikethrough and cmd+shift+u for underline
        - code-block fences were made visible in source editing; superseded by the structured editing cutover below.
        - give inline codeblocks (e.g. `some code snippet`) an inline container and an orange text color matching the color scheme of the conjure application
    - [x] feature: vim motions
        - opt-in Normal/Insert/Visual editing, counted motions, delete/change/yank, rich-text paste, and native Undo/Redo.
    - [x] use Notion-style structured editing instead of hidden Markdown source:
        - Markdown input shortcuts become attributed marks and paragraph types; native editing and Vim share visible offsets and Undo.
        - preserve image bytes and versioned semantic metadata in RTFD packages; back up legacy packages before their first structured save.
        - generate normalized Markdown for export; plain-text paste stays literal.
- [ ] feature: configurable color scheme
    - general design should stay consistent
    - only colors should be configurable; not the way the colors are used/presented (e.g. frosted glass effect with color blobs behind shouldn't change)
    - this should play nicely together with the theme control tool in `/Users/valdemar/Developer/Personal/Tools/tint`.