More webapp changes+fixes

webapp/src/app/layout/main-layout/main-layout.component.scss

@@ -51,6 +51,17 @@
   align-items: center;
 }
 
+.expert-mode-toggle {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+
+  .expert-mode-label {
+    font-size: 13px;
+    color: #666;
+  }
+}
+
 .header-trigger {
   font-size: 18px;
   cursor: pointer;
@@ -66,11 +77,23 @@
   display: flex;
   align-items: center;
   gap: 16px;
+}
+
+.user-info {
+  display: flex;
+  flex-direction: column;
+  align-items: flex-end;
+  line-height: 1.3;
 
   .user-id {
     color: #666;
     font-size: 13px;
   }
+
+  .key-id {
+    color: #999;
+    font-size: 13px;
+  }
 }
 
 .content-area {