refactor: Refactored mobile UI

Backend/README.md

@@ -169,7 +169,17 @@ OpenAPI docs are generated from Zod/OpenAPI definitions:
 | `GET /docs` | Swagger UI |
 
 ### Web Mobile Simulator
-Use `GET /sim/mobile-sim.html` to run a browser simulator that behaves like the mobile app:
+Use `GET /sim/mobile-sim.html` to run the full single-page browser simulator that behaves like the mobile app.
+
+Split-page entrypoints are also available:
+- `GET /sim/mobile-sim-auth.html`
+- `GET /sim/mobile-sim-onboarding.html`
+- `GET /sim/mobile-sim-camera.html`
+- `GET /sim/mobile-sim-client.html`
+- `GET /sim/mobile-sim-activity.html`
+- `GET /sim/mobile-sim-settings.html`
+
+All simulator pages support the same flow:
 - Register as `camera` or `client`
 - Connect Socket.IO with bearer device token
 - Camera: process incoming `start_stream` commands, fetch publish credentials, start/end motion events