Feature: Add "Full Disk Access" permission check for macOS client

macos/Permissions.h

@@ -26,6 +26,13 @@ public:
     // Open System Preferences to Accessibility settings
     static void openAccessibilitySettings();
 
+    // Check if Full Disk Access permission is granted
+    // Returns true if granted, false otherwise
+    static bool checkFullDiskAccess();
+
+    // Open System Preferences to Full Disk Access settings
+    static void openFullDiskAccessSettings();
+
     // Check all required permissions
     // Returns true if all permissions are granted
     static bool checkAllPermissions();