fix display of color

app/views/entries/monthly_report.html.erb

@@ -1,12 +1,13 @@
 <h1 class="mb‑4">Monats‑Report</h1>
 
 <% @report.each do |month, groups| %>
-  <div class="card mb‑4 mt-4">
+  <% is_current_month = month.month == Date.today.month && month.year == Date.today.year %>
+  <div class="card mb‑4 mt-4 <%= 'bg-secondary text-white' if is_current_month %>">
     <div class="card-header">
       <strong><%= month.strftime("%B %Y") %></strong>
     </div>
     <div class="card-body">
-      <table class="table table‑sm table‑bordered table-striped ">
+      <table class="table table‑sm table‑bordered table-stripe">
         <thead>
         <tr>
           <th  style="width: 33%">Typ</th>