SpecialX 064b3cf736 fix(exams): use slice to preserve full content when wrapping selections
Root cause: wrapIn (Tiptap's built-in command) can fail or lose content
when the selection spans multiple paragraphs or partial paragraphs. When
users selected a long reading passage and clicked "复合" (composite),
the content was destroyed — only fragments remained.

Fix: replace wrapIn with a manual slice-based approach:
1. Use doc.slice(from, to) to get the complete node structure of the
   selection (preserves paragraphs, lists, images, etc.)
2. deleteRange to remove the original selection
3. insertContentAt to insert a new questionBlock/groupBlock/sectionBlock
   containing the sliced content

This is more reliable than wrapIn because it doesn't depend on
ProseMirror's wrapping logic, which has edge cases with multi-paragraph
selections. The slice API captures the exact node structure, so no
content is lost.

Applied to all three wrapping operations:
- insertQuestion (questionBlock)
- insertGroup (groupBlock)
- insertSection (sectionBlock)
2026-06-24 14:37:01 +08:00
2025-12-12 16:21:14 +08:00
2025-12-12 16:21:14 +08:00

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