feat(ui): hide DO-manual, OCR engine, require-plat on office page

display:none only — element IDs, JS handlers and endpoints stay intact,
so re-enabling is dropping three inline styles. Default batch mode is
manual for the POC, so operators shouldn't see DO/OCR controls.

CHANGELOG.md

@@ -7,6 +7,11 @@ version tags are cut in this repo — POC stage, `main` is the release line).
 ## [Unreleased]
 
 ### Changed
+- **Office UI: DO-manual / OCR engine / require-plat temporarily hidden** —
+  `templates/monitoring.html` `display:none` on the DO Manual mode button and the
+  OCR Engine + Require plat meta rows. Hidden, not deleted: element IDs, JS
+  handlers, and endpoints all stay intact, and `default_mode: manual` is the
+  seed. Re-enable by dropping the three inline `display:none;` styles.
 - **Rebrand: Karung.AI / Karung Counter → Feedmill Counting Platform** — UI page
   titles, header logo, footer, argparse description, systemd unit `Description`s,
   README/AGENTS headings. Header CSS shrunk below 640px so the longer brand name