Low effort, minimal change suggestion: a link or table of contents header at the top of each month's page to jump to the diary entries.
Higher effort, bigger change suggestion: I think it would make for a significantly better reading experience if all of the diary pages and their transcriptions for a month were listed sequentially, such that you could seamlessly read them without clicking previous/next page.
I think it's a bit of a waste to have put so much effort into preserving this, but the actual ability to read it is de-prioritised relative to the ability to read an LLM summary.