Refactor HardwareLed class to use FastLED library and template for GPIO pin specification

lib/hardware/hardware_led.hpp

@@ -1,21 +1,30 @@
 #pragma once
 
 #include "hardware.pb.h"
-#include <Adafruit_NeoPixel.h>
+#include <FastLED.h>
 
 /**
  * @class HardwareLed
- * @brief Manages an LED strip on ESP8266 using Adafruit NeoPixel library.
+ * @brief Manages an LED strip on ESP8266 using FastLED library.
  * Supports animations defined by hardware_LedConfig (static, pulse, fade, flicker).
+ * Template parameter PIN specifies the GPIO pin at compile time.
+ *
+ * @tparam PIN The GPIO pin connected to the LED strip (e.g., 2 for D2 on ESP8266).
  */
+template<uint8_t PIN>
 class HardwareLed {
 public:
     using AnimationCallback = void (*)();
 
-    HardwareLed(uint8_t pin, uint8_t numPixels = 1);
+    /**
+     * @brief Constructor for HardwareLed.
+     * @param numPixels Number of pixels in the strip (default: 1).
+     */
+    HardwareLed(uint8_t numPixels = 1);
+    ~HardwareLed();
     void begin();
     void end();
-    void update(); // Removed const
+    void update();
     void set(const hardware_LedConfig& config);
     void setAnimationCallback(AnimationCallback cb) { m_callback = cb; }
     float estimateCurrent_mA() const;
@@ -23,13 +32,15 @@ public:
 private:
     void applyStatic(const hardware_StaticParams& params);
     void applyPulse(const hardware_PulseParams& params);
-    void applyFade(const hardware_FadeParams& params); // Removed const
+    void applyFade(const hardware_FadeParams& params);
     void applyFlicker(const hardware_FlickerParams& params);
     void setColor(uint32_t color, uint8_t brightness = 255);
     uint32_t lerpColor(uint32_t color1, uint32_t color2, float t) const;
 
-    Adafruit_NeoPixel m_strip;
+    CRGB* m_leds; // Dynamic array for pixel data
+    uint8_t m_numPixels;
     hardware_LedConfig m_currentConfig = hardware_LedConfig_init_default;
+    bool m_isActive;
     unsigned long m_startTime;
     uint8_t m_pulseState;
     unsigned long m_lastPulseTime;
@@ -39,6 +50,5 @@ private:
     uint32_t m_fadeTargetColor;
     float m_fadeProgress;
     unsigned long m_fadeStartTime;
-    bool m_isActive;
     AnimationCallback m_callback = nullptr;
 };