fix

app/Http/Controllers/BreathingExerciseController.php

@@ -42,8 +42,11 @@ public function createTemplate(Request $request)
 
   public function updateTemplate(Request $request, $id)
 {
+    // Editable: the user's own templates OR the shared/global ones (user_id null).
     $template = BreathingTemplate::where('id', $id)
-        ->where('user_id', auth()->id())
+        ->where(function ($q) {
+            $q->where('user_id', auth()->id())->orWhereNull('user_id');
+        })
         ->firstOrFail();
 
     $data = $request->validate([
@@ -65,7 +68,9 @@ public function updateTemplate(Request $request, $id)
     public function deleteTemplate($id)
     {
         $template = BreathingTemplate::where('id', $id)
-            ->where('user_id', auth()->id())
+            ->where(function ($q) {
+                $q->where('user_id', auth()->id())->orWhereNull('user_id');
+            })
             ->firstOrFail();
 
         $template->delete();