* feat(editor): add markdown table structure controls
* fix(editor): scope table context actions to cells
* Replace table toolbar with context-aware overlay controls
Replace the fixed table toolbar with context-sensitive overlay controls that position themselves around the active table, adding support for direct row/column insertion and full table deletion. This approach is less intrusive and supports click-targeted actions via coordinate-based cell resolution. Enhance structural safety by preventing header removal and ensuring tables never collapse below a single cell, deleting instead when the final row or column is removed. Harden the context-menu query with a 120ms timeout to keep the native menu responsive even if the renderer hangs.
* Replace markdown table context query with IPC coordination
Capture table cell targets on pointerdown and report via IPC channel
instead of executing JavaScript on context-menu events. Eliminates
120ms query timeout and unavailability race conditions. Header cells
now disable incompatible row-level actions.
* fix(editor): make table column rebalancing atomic with insertion
- Refactor rebalanceAddedColumn to mutate the caller's transaction, grouping
insertion and rebalance into a single undo step
- Add validation for cached cell positions that may outlive the document
- Fix table detection to use isInTable() instead of isActive('table')
- Correct z-index layering to respect menu stacking context
- Fix cleanup of stale animation frames and pending pointer state
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Co-authored-by: rainL <WYK15@users.noreply.github.com>
Co-authored-by: Jinjing <6427696+AmethystLiang@users.noreply.github.com>
Jinwoo Hong
Neil
