Document ESP32-S3 dashboard architecture

docs/roadmap.md

@@ -479,3 +479,48 @@ Phase 4:
 - Alarm details
 
 Do not start with touch or config UI on the Pico. The WebUI is the preferred configuration workflow.
+
+
+
+## Revised Dashboard Roadmap
+
+### Phase 1
+ESP32 cargo controller backend
+- WiFi
+- WebUI
+- Relay control
+- JBD/Xiaoxiang BMS
+- DS18B20
+- Config persistence
+
+### Phase 2
+Waveshare 5" ESP32-S3 Dashboard
+- Connect to cargo ESP AP
+- Read /status API
+- Basic dashboard
+- Battery SOC
+- Voltage/current
+- Temps
+- Relay status
+
+### Phase 3
+LVGL Dashboard UI
+- Touch support
+- Relay controls
+- Alarm screens
+- Config/status pages
+
+### Phase 4
+Extended Vehicle Telemetry
+- OBD-II
+- Coolant temp
+- GPS
+- Trip data
+- Vehicle metrics
+
+### Phase 5
+Advanced Integrations
+- Home Assistant
+- MQTT
+- Grafana
+- InfluxDB