README: NA's location band and ALL AUTO-FIX key

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -305,6 +305,16 @@ checklist's backup-to-drive.sh. Other locations are reached over SSH as the acco
 location's settings too: `config.json` (NA) and `sites/<id>/config.json`; a reinstall with `--site <id>` starts from it.
 Smart-plug keys (outlets.json) are never copied.
 
+## Other locations' problems on NA's page keys, and ALL AUTO-FIX
+
+- **Blue band** (NA only, `nav_locations_band`): when another location has a problem, NA's page-number key on every
+  page gets a blue band naming it ("SC", "SC WS", "SC?" when it stops answering). It flashes until that location
+  acknowledges, then stays; the page's own name and number shrink into the top 60% so they stay readable. Red stays
+  for NA's own problems.
+- **ALL AUTO-FIX** (LOCATIONS page 98, bottom-left): blue "ALL ON", or grey naming the paused locations. Tap: pause
+  auto-fix at NA, WS and SC at once; tap again: every one back to its own auto-fix hours (`autofix auto`). Alarms stay
+  on and holds still fix.
+
 ## Every location on North Attleboro's deck (NA only)
 
 Each location set up from NA's install line tells NA's settings page where it is (`/api/campus/hello`) and learns