Function overlayParagraphDiff

overlayParagraphDiff(
previous: string | undefined,
next: string,
): { addedParagraphs: string[]; removedParagraphs: string[]; same: boolean }
Produce a diff hint that the memory-extractor UI surfaces to the user: highlight added paragraphs vs the previous overlay. Returns { same, addedParagraphs, removedParagraphs } — a paragraph is a blank-line-separated block.
Parameters
- previous: string | undefined
- next: string
Returns { addedParagraphs: string[]; removedParagraphs: string[]; same: boolean }