tsconfig.tsbuildinfo is a generated incremental TypeScript build artifact and should not be committed. Please remove it from the PR and add *.tsbuildinfo (or this specific file) to .gitignore so it doesn’t reappear.

app/types.ts is being expanded with new block types (image, video, audio, math) and media/math fields. Unless the app layer is ready to consume these types in this PR, this introduces schema surface area without behavior and can complicate persistence/migrations. Consider deferring this change or shipping it together with the corresponding rendering and storage logic.

In the '/' key handler, currentBlock.content is read from React state before the '/' character has been applied to the DOM/content. slice(0, -1) will therefore remove the last real character the user typed (or do nothing on empty), causing content loss. Consider preventing default for '/' and opening the menu without inserting it, or remove the slash based on the DOM text/selection after the input update (e.g., in onInput or after a microtask) rather than slicing state here.

Large sections of keyboard navigation logic are commented out. Leaving disabled code blocks in-place makes future maintenance harder and risks drifting from reality. Consider gating this behavior behind a boolean/feature flag or reintroducing it scoped to sidebar focus (as noted in the PR description), and remove the commented implementation once replaced.

This PR adds new block types (image, video, audio, math) and new media/math fields to the Block schema, but the rest of the editor UI in this PR doesn’t appear to handle/render them yet and the PR description doesn’t mention introducing these new types. If this is not intended to ship now, consider scoping it out of this PR to avoid partial/unused schema expansion (or add the corresponding rendering/serialization paths).

focusBlock only updates cursorPosition when an explicit position is provided. When focusing a different block via click/focus with position omitted, the previous block's cursorPosition value can carry over and cause the newly focused Block to programmatically reposition the caret (overriding the user’s click location). Consider clearing cursorPosition (set to null) when changing focusedBlockId without an explicit position, or ensure click/focus callers pass null to indicate “don’t reposition.”

This component includes multiple console.log debug statements in event handlers (onFocus, onMouseDown, onMouseUp, onClick). These will be noisy in production and can impact performance during typing. Please remove them or guard behind a dev-only flag before merging.

The new table rendering uses uncontrolled <input> elements with hard-coded defaults and does not connect to block.content / updateBlock. Any edits won't persist across rerenders, and the block data model (string content) can't round-trip this UI. Either keep table as the existing contentEditable model for now, or introduce a structured table model + serialization and wire input changes back into onUpdateBlocks.

The close control was changed from a <button> to a clickable <span>, which makes it unreachable via keyboard and not announced correctly to assistive tech. Prefer keeping it as a real button (with type="button" and an aria-label) and avoid nested-button issues by restructuring the tab container (e.g., outer wrapper not a <button>, or use a button for close inside a non-button tab element).

The menu’s global keydown handler calls preventDefault() for all keys (default case), which can unintentionally block common shortcuts (e.g., Cmd/Ctrl+F, Cmd/Ctrl+C) while the slash menu is open. Consider only preventing default for the keys the menu actually handles (ArrowUp/Down, Enter, Escape) and letting other keys fall through (or using them for filtering if desired).