Refactor mcu code. Closes #11

gemini.md

@@ -110,7 +110,11 @@ esp32c3-wiji/
 ├── platformio.ini                # PlatformIO config (env: esp32-c3-devkitm-1)
 ├── fivebarIKGame.js              # REFERENCE ONLY — original site's kinematics (do not import)
 ├── src/
-│   └── main.cpp                  # ESP32 firmware (BLE + AccelStepper)
+│   ├── Config.h                  # Pins, Constants, UUIDs
+│   ├── BleManager.cpp            # BLE setup, callbacks, notifications
+│   ├── MotorController.cpp       # AccelStepper wrap, homing state, idle timeout
+│   ├── StatusLed.cpp             # Onboard LED feedback logic
+│   └── main.cpp                  # Main app glue, command router
 └── web/
     ├── styles/
     │   ├── base.css              # CSS variables, reset, typography, layout primitives
@@ -387,7 +391,7 @@ The `?v=Date.now()` on imports handles this automatically on page load.
   - JSON export to persist sequences to `sequences.json`.
   - Quick Sequences UI in `stepper-test`, `board-control`, and `input-text`.
   - Shared `sequence-runner.js` to handle asynchronous execution and delays.
-- [x] Firmware (`src/main.cpp`) — AccelStepper + BLE command parser + position NOTIFY
+- [x] Firmware (Modularized) — `BleManager`, `MotorController`, `StatusLed`, and `main.cpp` for routing.
 
 ---