掲示板実装

app/views/games/show.html.erb

@@ -414,6 +414,45 @@
 
     <!-- 右カラム: 情報パネル (1/3) -->
     <div class="space-y-6">
+      <!-- 掲示板リンク -->
+      <div class="bg-white shadow rounded-lg border border-gray-200 overflow-hidden">
+        <div class="p-4 flex items-center justify-between">
+          <div class="flex items-center">
+            <div class="flex-shrink-0 bg-indigo-100 rounded-md p-3">
+              <i class="fa-solid fa-comments text-indigo-600 text-xl"></i>
+            </div>
+            <div class="ml-4">
+              <h3 class="text-lg font-medium text-gray-900">外交・交渉掲示板</h3>
+              <p class="text-sm text-gray-500">
+                秘密交渉や全体アナウンスはこちら
+              </p>
+            </div>
+          </div>
+          <div>
+            <%= link_to game_boards_path(@game), class: "inline-flex items-center px-4 py-2 border border-transparent text-sm font-medium rounded-md shadow-sm text-white bg-indigo-600 hover:bg-indigo-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-indigo-500" do %>
+              掲示板へ
+              <% 
+                # 未読件数取得（参加中の全掲示板の合計）
+                current_participant = @game.participants.find_by(user: current_user)
+                if current_participant
+                  total_unread = 0
+                  current_participant.boards.each do |board|
+                    total_unread += board.unread_count_for(current_participant)
+                  end
+                  if total_unread > 0 
+              %>
+                <span class="ml-2 inline-flex items-center justify-center px-2 py-1 text-xs font-bold leading-none text-red-100 bg-red-600 rounded-full">
+                  <%= total_unread %>
+                </span>
+              <% 
+                  end
+                end
+              %>
+            <% end %>
+          </div>
+        </div>
+      </div>
+
       <!-- 国ステータス表 -->
       <div class="bg-white shadow rounded-lg border border-gray-200 overflow-hidden">
         <div class="px-4 py-3 bg-gray-50 border-b border-gray-200">