Merge pull request #217 from SyncrowIOT/SP-1584-FE-Block-Energy-Device-from-Being-Added-to-Then-Section-with-Validation-Message

Refactor energy clamp dialog to handle empty functions list gracefully

lib/pages/routines/widgets/routine_dialogs/power_clamp_enargy/energy_clamp_dialog.dart

@@ -99,7 +99,27 @@ class _EnergyClampDialogState extends State<EnergyClampDialog> {
               mainAxisSize: MainAxisSize.min,
               children: [
                 const DialogHeader('Energy Clamp Conditions'),
-                Expanded(child: _buildMainContent(context, state)),
+                Expanded(
+                    child: Visibility(
+                  visible: _functions.isNotEmpty,
+                  replacement: SizedBox(
+                    child: Row(
+                      crossAxisAlignment: CrossAxisAlignment.center,
+                      mainAxisAlignment: MainAxisAlignment.center,
+                      children: [
+                        Center(
+                            child: Text(
+                          'You Cant add\n the Power Clamp to Then Section',
+                          textAlign: TextAlign.center,
+                          style: context.textTheme.bodyMedium!.copyWith(
+                              color: ColorsManager.red,
+                              fontWeight: FontWeight.w400),
+                        )),
+                      ],
+                    ),
+                  ),
+                  child: _buildMainContent(context, state),
+                )),
                 _buildDialogFooter(context, state),
               ],
             ),