refactor: 非アクティブ項目のスタイルを共通CSSクラスに抽出

- custom.scssに.stats-table .inactive-itemクラスを追加
- background-color: gainsboroスタイルを一元管理
- /dojosと/stats#prefecturesの両方で同じクラスを使用
- 将来的に他のテーブルでも再利用可能

Author: yasulab

app/assets/stylesheets/custom.scss

@@ -1072,3 +1072,10 @@ section {
   line-height: 1.7em;
   color: #909090;
 }
+
+/* Stats and Dojos table styling */
+.stats-table {
+  td.inactive-item {
+    background-color: gainsboro;
+  }
+}

app/views/dojos/index.html.erb

@@ -87,7 +87,7 @@
   </style>
 
   <div style="margin-top: 20px;" align="center">
-    <table border="1">
+    <table border="1" class="stats-table">
       <tr>
         <th>
           <small>
@@ -113,26 +113,49 @@
       </tr>
       <% @dojos.each do |dojo| %>
         <tr>
-          <td>
-	    <small>
-	      <%= link_to dojo_path(dojo[:id]) do %>
-		<%= dojo[:name] %><br>
-		<small>(ID: <%= dojo[:id] %>)</small>
-	      <% end %>
-	    </small>
-          </td>
-          <td>
-	    <small><%= dojo[:created_at].strftime("%F") %></small>
-          </td>
-          <td class="url-cell">
-            <small>
-	      <a href='<%= dojo[:url] %>'>
-		<span title="<%= dojo[:url] %>">
-		  <%= CGI.unescape dojo[:url].gsub('https://', '').gsub('http://', '').gsub('www.', '').chomp('/') %>
-		</span>
-	      </a>
-            </small>
-          </td>
+          <% if dojo[:is_active] %>
+            <td>
+	      <small>
+	        <%= link_to dojo_path(dojo[:id]) do %>
+		  <%= dojo[:name] %><br>
+		  <small>(ID: <%= dojo[:id] %>)</small>
+	        <% end %>
+	      </small>
+            </td>
+            <td>
+	      <small><%= dojo[:created_at].strftime("%F") %></small>
+            </td>
+            <td class="url-cell">
+              <small>
+	        <a href='<%= dojo[:url] %>'>
+		  <span title="<%= dojo[:url] %>">
+		    <%= CGI.unescape dojo[:url].gsub('https://', '').gsub('http://', '').gsub('www.', '').chomp('/') %>
+		  </span>
+	        </a>
+              </small>
+            </td>
+          <% else %>
+            <td class="inactive-item">
+	      <small>
+	        <%= link_to dojo_path(dojo[:id]) do %>
+		  <%= dojo[:name] %><br>
+		  <small>(ID: <%= dojo[:id] %>)</small>
+	        <% end %>
+	      </small>
+            </td>
+            <td class="inactive-item">
+	      <small><%= dojo[:created_at].strftime("%F") %></small>
+            </td>
+            <td class="url-cell inactive-item">
+              <small>
+	        <a href='<%= dojo[:url] %>'>
+		  <span title="<%= dojo[:url] %>">
+		    <%= CGI.unescape dojo[:url].gsub('https://', '').gsub('http://', '').gsub('www.', '').chomp('/') %>
+		  </span>
+	        </a>
+              </small>
+            </td>
+          <% end %>
         </tr>
       <% end %>
     </table>

app/views/stats/show.html.erb

@@ -361,7 +361,7 @@
     </div>
   </h2>
   <div style="margin-top: 20px;" align="center">
-    <table border="1">
+    <table border="1" class="stats-table">
       <tr>
         <th style="padding: 10px;">
           <small><%= @lang == 'en' ? 'Prefecture' : '都道府県名' %></small>
@@ -373,10 +373,10 @@
       <% @data_by_prefecture.each_with_index do |(prefecture, count), index| %>
         <tr>
           <% if count == 0 %>
-            <td style="background-color: gainsboro; padding: 0px;">
+            <td class="inactive-item" style="padding: 0px;">
               <small><%= prefecture %></small>
             </td>
-            <td style="background-color: gainsboro; padding: 0px;">
+            <td class="inactive-item" style="padding: 0px;">
               <small><%= count %></small>
             </td>
           <% else %>