Replace three divergent data paths (Marked HTML loading, regex post-processing
saving, separate paste parsing) with one symmetric path through @tiptap/markdown.
Key changes:
- Create features/editor/ module with ContentEditor (unified edit+readonly)
and TitleEditor, replacing components/common/ editor files
- Load content via contentType: 'markdown' instead of markdownToHtml() hack
- Save content via editor.getMarkdown() directly, no post-processing
- Merge RichTextEditor + ReadonlyEditor into single ContentEditor with
editable prop
- Extract extensions into separate modules (mention, file-upload,
markdown-paste, submit-shortcut, code-block-view)
- Extract shared preprocessMentionShortcodes to components/markdown/mentions.ts
- Add copyMarkdown utility for clipboard operations
- Upgrade all @tiptap packages from 3.20.5 to 3.22.1 (lexer isolation fix,
HTML entity roundtrip fix, table alignment support)
- Delete markdownToHtml.ts, readonly-editor.tsx, and 10 old component files
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- New TitleEditor: minimal tiptap (Document+Paragraph+Text+Placeholder)
- Single-paragraph constraint prevents Enter from creating new lines
- contenteditable div enables visual word-wrap (no horizontal scroll)
- Enter→submit+blur, Shift+Enter blocked, Escape→blur
- Replace <Input> in create-issue modal and <input> in issue-detail
- Remove titleDraft state/titleFocusedRef/sync effect from issue-detail
- Fix duplicate React key: TitleEditor key={`title-${id}`}
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
