Add icons to methods and operators navigation

index.html

@@ -32,8 +32,8 @@
       <button id="tab-overall" class="tab active" data-tab="overall" aria-current="page">🏅 Overall</button>
       <button id="tab-dataset" class="tab" data-tab="dataset">🏅 By dataset</button>
       <button id="tab-tradeoffs" class="tab" data-tab="tradeoffs">🏅 Trade-offs</button>
-      <button id="tab-methods" class="tab" data-tab="methods">Methods</button>
-      <button id="tab-operators" class="tab" data-tab="operators">Operators</button>
+      <button id="tab-methods" class="tab" data-tab="methods">📚 Methods</button>
+      <button id="tab-operators" class="tab" data-tab="operators">⚙️ Operators</button>
       <button id="tab-about" class="tab" data-tab="about">📝 About</button>
     </nav>
     <div id="load-error" class="error-message" role="alert" hidden></div>