style(ui): New session button steps down from primary to outline

Generated-By: PostHog Code
Task-Id: 0331ac58-0a1c-4b4e-b884-2ff7d8e71986

Author: puemos

packages/ui/src/features/canvas/components/SpacesSidebarNav.tsx

@@ -191,10 +191,10 @@ export function SpacesSidebarNav() {
           global button defaults to #me — the composer's space chip is where
           to retarget; a space's own "+" pre-fills that space instead. */}
       <div className="shrink-0 px-2 pb-1.5">
-        {/* quill's primary treatment — the sidebar's one elevated CTA, sized
-            like the sm rows around it. */}
+        {/* quill's outline treatment — a step above the flat rows without
+            primary's shout; centered, sized like the sm rows around it. */}
         <Button
-          variant="primary"
+          variant="outline"
           size="sm"
           className="w-full gap-1.5"
           onClick={() => {