The composer's format came only from the "plain text only" setting, and
a reopened draft was forced into it: with plain text on, an HTML draft
was flattened on its first autosave, and with it off a text draft opened
in the rich-text editor.
Ported from the webmail (f6ad8a59, `compose-format.ts`):
- a reopened draft opens in the format it was written in; an empty
draft and new messages still follow the setting
- a toolbar button switches just this message between rich and plain
text, converting the body in place; the signature keeps its place
(end or above the quote) in the target format, so it is never
doubled or lost
- images inserted into the rich-text body stay on as ordinary
attachments after a switch to plain text instead of being dropped
- Implemented a new RichTextEditor component for composing and editing rich text emails.
- Enhanced EmailThreadScreen to support downloading attachments with loading indicators.
- Added functionality to expand/collapse attachment list in EmailThreadScreen.
- Created utility functions for building initial HTML for email composition and converting HTML to plain text.
- Added tests for HTML composition and conversion utilities.
- Implement markdown formatting in the email composer, allowing users to use bold, italic, lists, and blockquotes.
- Add functionality to upload and manage attachments, including inline images.
- Introduce a new compose-format utility for converting markdown to HTML.
- Update the ComposeScreen to handle attachments and formatting actions.
- Refactor ContactDetailScreen and EmailListScreen for improved code clarity and performance.
- Add tests for markdown formatting and selection wrapping functionalities.
Linus Rath