Port piNail2 web UI and API parity to ESP32-C3 with one-side pin mapping

README.md

@@ -3,9 +3,7 @@
 ESP32-C3 firmware for a single-nail piNail controller.
 
 ## What changed vs piNail2
-- Single nail only.
-- Loop timing is fixed for responsiveness (`1800ms` cycle, `200ms` tick).
-- Loop timing controls are intentionally not exposed in API/UI.
+- Single physical nail hardware (nail2 UI/API is mirrored for compatibility).
 - Wi-Fi onboarding uses captive portal (`piNail-Setup` / `pinailsetup`).
 
 ## Hardware target
@@ -14,29 +12,38 @@ ESP32-C3 firmware for a single-nail piNail controller.
 - Relay output: active HIGH relay module.
 
 ## GPIO mapping
-- Relay: `GPIO2`
-- MAX6675 SCK: `GPIO4`
-- MAX6675 CS: `GPIO5`
-- MAX6675 SO: `GPIO6`
+- Relay: `D10`
+- MAX6675 SCK: `D9`
+- MAX6675 CS: `D8`
+- MAX6675 SO: `D7`
 
 ## API compatibility
 Implemented endpoints:
 - `GET /api/status`
+- `GET /api/status/all`
 - `GET /api/history`
 - `POST /api/power`
 - `POST /api/setpoint`
+- `POST /api/control`
+- `POST /api/flight`
+- `POST /api/scheduler`
 - `POST /api/pid`
 - `POST /api/pid/reset`
 - `POST /api/safety/reset`
 - `GET /api/heartbeat`
+- `GET /api/autotune`
+- `POST /api/autotune/start`
+- `POST /api/autotune/stop`
+- `GET/POST /api/presets`
+- `POST /api/preset/<name>`
+- `DELETE /api/preset/<name>`
+- `GET /api/config`
 
 Built-in web interface:
-- `GET /` serves a lightweight control UI for power, setpoint, PID, and safety reset.
+- `GET /` serves the piNail2-style dashboard UI (embedded static assets).
 
 Not implemented in this firmware:
-- Scheduler and dual-nail routing.
-- Autotune endpoints.
-- Loop timing reconfiguration endpoint.
+- True independent dual-zone control (nail2 is API/UI-compatible mirror of nail1).
 
 ## Build and flash
 ```bash