Closes #5400
Closes #5405
Closes #5399
Closes #5398

Summary

A cross-block cut whose end lands in a table went through removeBlocksIntoTable() in packages/muya/src/clipboard/cut.ts, which removed the top-level blocks between the start's outermost block and the table by walking before.outMostBlock.next until it reached the table. Four problems came out of that:

• [Bug] Deleting a selection that ends in a table inside a list or quote also deletes every block after it #5400 a table inside a list item or a quote is never one of those top-level siblings, so the walk ran to the end of the document. Every block after the start was deleted, a quote holding the table was deleted with it, and emptying the cells of the now detached table threw Cannot destructure property 'path' of 'this.parent' as it is null.
• [Bug] Deleting a selection from inside a list into a table after it keeps the selected rest of the list #5399 the blocks after the start inside its own list, list item or quote were never removed, the gap fix(muya): remove the selected rest of a list or quote when a cut starts in it (#5385) #5397 closed for the other path.
• [Bug] Deleting a selection that ends in a table moves unselected cell text out of the table and keeps a fully selected table #5405 the text after the selection end was merged into the start block, moving it out of its cell, and a table the selection covered whole was left behind as an empty grid.
• [Bug] After deleting a selection that ends in a table, the emptied cells still show their old text #5398 the emptied cells kept showing their old text, so the editor did not match the saved document.

Both paths now share one span removal:

• removeSpan(before, end, removeEnd) removes the blocks after the start inside its containers, the blocks between the two branches, and the blocks before end inside its containers. removeEnd says whether end itself (and the containers it empties) goes. The general path passes the end leaf and true.
• A cut into a table stops the span at the table, then clears the cells the selection covers whole. The end cell keeps the text the selection leaves behind, so nothing moves out of the table.
• A fully selected table goes with the span, the way it already does when the selection runs past the table. resolveCutEnd() reports that case, since only it knows the offsets.
• Clearing a cell re-renders it, the way TableRectSelection.emptySelectedCells() already does.

A cut with both ends inside one table still merges the end cell's tail into the start cell, unchanged.

Steps to reproduce

Checked with real mouse, keyboard and menu input in a desktop build of develop @ 0e156b0 and of this branch, using Playwright _electron. Each starts by clicking right after a and pressing Shift+↓ until the selection reaches the cell named below, then Backspace.

Type of change

• Bug fix (non-breaking, fixes an issue)
• New feature (non-breaking, adds functionality)
• Breaking change (causes existing functionality to change)
• Documentation update

Test plan

• New unit tests in clipboard/__tests__/cutIntoTable5400.spec.ts (8 cases), each checking the json state against the block tree. 7 of them fail on develop:
  • the blocks after the list holding the table stay ([Bug] Deleting a selection that ends in a table inside a list or quote also deletes every block after it #5400);
  • the quote holding the table and the blocks after it stay ([Bug] Deleting a selection that ends in a table inside a list or quote also deletes every block after it #5400);
  • the rest of the list goes and the unselected cell text stays ([Bug] Deleting a selection from inside a list into a table after it keeps the selected rest of the list #5399, [Bug] Deleting a selection that ends in a table moves unselected cell text out of the table and keeps a fully selected table #5405);
  • a fully selected table is removed ([Bug] Deleting a selection that ends in a table moves unselected cell text out of the table and keeps a fully selected table #5405), and so is the quote it leaves empty;
  • cleared cells are empty in the DOM ([Bug] After deleting a selection that ends in a table, the emptied cells still show their old text #5398), for a cut into a table and for a cut inside one table;
  • a table the selection passes over is still removed (unchanged).
• New e2e spec editing/cut-into-table-5400.spec.ts (3 tests) with the real keyboard, checking the markdown and the cells' rendered text. All fail on develop, pass with the fix (3/3 repeated).
• Related e2e specs pass (33 tests): the Unexpected error with message Cannot insert into out of bounds index #4903 / [Bug] Cutting from a nested code block's language box replaces the whole list or quote #5368 / [Bug] Cutting a selection that ends in a code block's language box duplicates text and removes the language box #5371 / [Bug] Deleting a selection from inside a list or quote to a block after it keeps the selected rest of the list or quote #5385 cut specs, clipboard, selection, table-cell-selection, table-rect-clipboard and undo-redo.
• Real desktop app: every row of the table above, plus a cut inside one table and a drag out of a table (both unreachable for a text selection, unchanged).
• muya: vitest run 1690 tests; lint:types, eslint on the changed files and check-circular pass.
• Manually tested on: macOS

Notes for reviewers

• Unchanged on purpose: a cut with both ends in one table keeps merging the end cell's tail into the start cell (trackCCut.spec.ts covers it). [Bug] Deleting a selection that ends in a table moves unselected cell text out of the table and keeps a fully selected table #5405 is about text leaving the table, and a text selection across cells is not reachable with real input — dragging across cells starts the table's own rectangular selection.
• removeBlocksIntoTable() is gone, replaced by removeSpan() plus the cell clearing in removeBlocks().

By submitting this pull request, I confirm that my contribution is made under the terms of the MIT license.

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https://claude.ai/code/session_01WEPLCvFTgbYf35z85XUJop