fix: description fixed nullable

app/Http/Controllers/BreathingExerciseController.php

@@ -17,7 +17,7 @@ public function createTemplate(Request $request)
             'exhale' => 'required|integer|min:1',
             'breath_hold' => 'required|integer|min:0',
             'duration' => 'sometimes|integer|min:10',
-            'description' => 'sometimes|string'
+            'description' => 'sometimes|string|nullable'
         ]);
 
         $template = BreathingTemplate::create([
@@ -27,7 +27,7 @@ public function createTemplate(Request $request)
             'exhale' => $data['exhale'],
             'breath_hold'=> $data['breath_hold'] ?? 0,
             'duration'=> $data['duration'] ?? 60,
-            'description' => $data['description']
+            'description' => $data['description'] ?? null
         ]);
 
         return response()->json(['message' => 'Template created', 'template' => $template]);
@@ -45,7 +45,7 @@ public function updateTemplate(Request $request, $id)
         'exhale' => 'sometimes|required|integer|min:1',
         'breath_hold' => 'sometimes|integer|min:0',
         'duration' => 'sometimes|integer|min:10',
-        'description' => 'sometimes|string'
+        'description' => 'sometimes|string|nullable'
     ]);
 
     $template->update($data);