repaired some path handling, improved error handling

include/ModuleLoader.hpp

@@ -2,25 +2,20 @@
 #include <string>
 #include <vector>
 #include "error.hpp"
-#include "dpm_interface.hpp"
 #include <filesystem>
 #include <dlfcn.h>
 #include <iostream>
-#include <module_interface.hpp>
-
-// Forward declaration to avoid circular dependency
-struct CommandArgs;
+#include "module_interface.hpp"
 
 class ModuleLoader {
 public:
     explicit ModuleLoader(std::string module_path = "/usr/lib/dpm/modules/");
     DPMError list_available_modules(std::vector<std::string>& modules) const;
     DPMError get_module_path(std::string& path) const;
-    DPMError get_absolute_module_path(std::string& abs_path) const;
 
     // Load and execute methods
     DPMError load_module(const std::string& module_name, void*& module_handle) const;
-    DPMError execute_module(void* module_handle, const std::string& command) const;
+    DPMError execute_module(const std::string& module_name, const std::string& command) const;
 
     // Get module version
     DPMError get_module_version(void* module_handle, std::string& version) const;

include/dpm_interface.hpp

@@ -5,7 +5,8 @@
 #include "error.hpp"
 #include <dlfcn.h>
 #include <iomanip>
-#include "ModuleLoader.hpp"  // This should include ModuleLoader since it's used directly
+#include <filesystem>
+#include "ModuleLoader.hpp"
 
 /*
  *