Improve session sidebar UX and tool rendering

src/styles/components.css

@@ -907,6 +907,10 @@ button.button-primary {
   background-color: rgba(0, 128, 255, 0.22);
 }
 
+.tool-call-task-container {
+  padding: 12px;
+}
+
 .tool-call-task-summary {
   @apply my-2 flex flex-col gap-1.5;
 }
@@ -1825,11 +1829,6 @@ button.button-primary {
   color: var(--text-primary);
 }
 
-.session-item-special {
-  color: var(--text-muted);
-  font-style: italic;
-}
-
 .session-item-active .session-item-close:hover {
   background-color: rgba(255, 255, 255, 0.2);
 }