Block Void Delete vs Line Break

Goal

Fix suggestion-mode paragraph-start deletion so previous solitary block voids are marked as remove suggestions instead of remove line-break suggestions.

Findings

• Current cross-block branch in packages/suggestion/src/lib/transforms/deleteSuggestion.ts always marks the previous block with isLineBreak: true.
• That is correct for paragraph-to-paragraph merges.
• That is wrong when the previous block is itself a block void such as image or toc.
• A focused regression in packages/suggestion/src/lib/withSuggestion.spec.tsx reproduced the bug with a toc block void followed by a paragraph.
• The minimal durable fix is to branch on editor.api.isVoid(previousAboveNode[0]) && !editor.api.isInline(previousAboveNode[0]) inside the existing cross-block delete path.

Plan

1. Add a failing regression in packages/suggestion/src/lib/withSuggestion.spec.tsx.
2. Split cross-block delete behavior by previous block shape.
3. Verify packages/suggestion build, typecheck, lint, and targeted tests.

Result

• Added the block-void regression and fixed deleteSuggestion so solitary block voids receive normal block remove suggestions.
• Refreshed docs/solutions/logic-errors/2026-04-08-suggestion-delete-backward-must-mark-inline-voids.md so it no longer claims every cross-block delete should become a line-break suggestion.