feat: improve task handling, refactoring

include/TaskManager.h

@@ -7,10 +7,6 @@
 #include "NodeContext.h"
 #include <ArduinoJson.h>
 
-// Forward declarations to avoid multiple definition errors
-class Task;
-class Scheduler;
-
 // Define our own callback type to avoid conflict with TaskScheduler
 using TaskFunction = std::function<void()>;
 
@@ -60,13 +56,8 @@ public:
     
 private:
     NodeContext& ctx;
-    std::vector<Task*> tasks;
     std::vector<TaskDefinition> taskDefinitions;
+    std::vector<unsigned long> lastExecutionTimes;
     
-    Task* findTask(const std::string& name) const;
-    void createTask(const TaskDefinition& taskDef);
-    
-    // Static callback registry for all TaskManager instances
-    static std::map<std::string, std::function<void()>> callbackRegistry;
-    static void executeCallback(const std::string& taskName);
+    int findTaskIndex(const std::string& name) const;
 };