Write scheduled Jaah documentation updates

Docs-writer run. Follow apps/docs/WRITER.md on develop. Do each item that is due, all in ONE PR: 1. Screens: one console feature's reference page. 2. Guides: one Get started, Using Jaah or FAQ item. 3. Changelog: the next batch of prod promotions 4. Reference: the Jaah API and Real-time reference against the code. Sign in only through the capture helper. Nothing due: end with no PR.

Docs-writer: People page re-shot on prod and updated, v1.2.3254 changelog (1 bullet, #6470), Pagination names two fixed-cap lists; Guides nothing due. Quick gate green, PR #6496 queued to merge lane. Follow-up drafts #8612, #8613. Visual check done: shots legible, PII blurred. Memory: none applied.