feat: update grid layout for admin home page cards

- Changed column classes for visit statistics cards from `g-col-3` to `g-col-12 g-col-md-6 g-col-lg-3` to improve responsiveness and layout on different screen sizes.

resources/views/admin/home.blade.php

@@ -6,7 +6,7 @@
 
         <div class="grid g-4 mb-4">
             <!-- Total des visites -->
-            <div class="g-col-3">
+            <div class="g-col-12 g-col-md-6 g-col-lg-3">
                 <div class="card text-center">
                     <div class="card-body">
                         <h5 class="card-title">Total des visites</h5>
@@ -14,7 +14,7 @@
                     </div>
                 </div>
             </div>
-            <div class="g-col-3">
+            <div class="g-col-12 g-col-md-6 g-col-lg-3">
                 <div class="card text-center">
                     <div class="card-body">
                         <h5 class="card-title">Visites depuis 30 jours</h5>
@@ -22,7 +22,7 @@
                     </div>
                 </div>
             </div>
-            <div class="g-col-3">
+            <div class="g-col-12 g-col-md-6 g-col-lg-3">
                 <div class="card text-center">
                     <div class="card-body">
                         <h5 class="card-title">Visites depuis 7 jours</h5>
@@ -30,7 +30,7 @@
                     </div>
                 </div>
             </div>
-            <div class="g-col-3">
+            <div class="g-col-12 g-col-md-6 g-col-lg-3">
                 <div class="card text-center">
                     <div class="card-body">
                         <h5 class="card-title">Visites aujourd'hui</h5>