Dashboard: Session message counts, workspace path, Agent persona

wwwroot/css/placeholder.css

@@ -1,4 +1,4 @@
-.placeholder {
+.settings-page .placeholder {
   flex: 1;
   display: flex;
   flex-direction: column;
@@ -6,6 +6,6 @@
   padding: calc(var(--s4) * 2);
 }
 
-.placeholder-icon {
+.settings-page .placeholder-icon {
   font-size: 4em;
 }