egoSample: add inline '← all datasets' link in the sidebar header

egoSample/index.html

@@ -6,7 +6,9 @@
 body{background:#07090d;color:#e6e8ee;font:14px/1.5 -apple-system,"Helvetica Neue",Arial,"PingFang SC",sans-serif}
 .wrap{display:flex;height:100vh;overflow:hidden}
 .side{width:290px;flex:0 0 290px;background:#0b0e13;border-right:1px solid #1c2028;overflow-y:auto}
-.side .st{font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;color:#8890a0;padding:15px 15px 8px}
+.side .st{display:flex;align-items:baseline;gap:9px;font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;color:#8890a0;padding:15px 15px 8px}
+.side .st .back{text-transform:none;letter-spacing:0;font-size:12px;color:#6f92c8;text-decoration:none;white-space:nowrap;flex-shrink:0}
+.side .st .back:hover{text-decoration:underline}
 .cat{border-top:1px solid #14181f}
 .cat > .ch{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:10px 15px;cursor:pointer;background:#0e1219}
 .cat > .ch:hover{background:#12151c}
@@ -30,7 +32,7 @@ iframe{flex:1;width:100%;border:0;background:#07090d}
 </style></head><body>
 <div class="wrap">
   <nav class="side">
-    <div class="st">Ego Sample &mdash; 11 tasks</div>
+    <div class="st"><a class="back" href="../index.html">&larr; all datasets</a><span>Ego Sample &mdash; 11 tasks</span></div>
     <div id="nav"></div>
   </nav>
   <div class="main">