fix(panel): even spacing between the session detail header pills

Drop the kind-badges margin-left and match its gap to the parent .sp-agent, so the
agent-to-kind gap equals the gap between kind pills.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: upsetbit

internal/panel/assets/css/components/kind-badge.css

@@ -6,10 +6,12 @@
    read well. Pairs with the kindBadge Go template helper in
    internal/panel/server.go. */
 
+/* No margin-left: the parent .sp-agent already spaces children with its own
+   gap, so an extra margin here made the agent→kind gap wider than the gap
+   between kinds. One gap for all the header pills. */
 .kind-badges {
   display: inline-flex;
-  gap: var(--space-1);
-  margin-left: var(--space-2);
+  gap: var(--space-2);
   vertical-align: middle;
 }