style(workflow): peek bars share the card family's 12px radius

The back identity bars sat at rounded-t-lg (8px) against the front cards'
rounded-xl (12px) — mismatched radii on same-family stacked surfaces is the
classic tell that something's off. Both bars now use rounded-t-xl, so the
stack reads as the same card peeking from behind on either side of the flip.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: andresdjasso

apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/docked-chat/workflow-with-chat.tsx

@@ -350,7 +350,7 @@ export function WorkflowWithChat() {
             type='button'
             aria-label='Show resources'
             onClick={() => setStageFront('card')}
-            className='absolute inset-x-4 top-2 z-0 flex h-[38px] items-start rounded-t-lg border border-[var(--border-1)] bg-[var(--bg)] px-3 transition-colors hover-hover:bg-[var(--surface-active)]'
+            className='absolute inset-x-4 top-2 z-0 flex h-[38px] items-start rounded-t-xl border border-[var(--border-1)] bg-[var(--bg)] px-3 transition-colors hover-hover:bg-[var(--surface-active)]'
           >
             <span className='flex h-[26px] min-w-0 items-center gap-1.5'>
               {getResourceConfig(activeStageTab.type).renderTabIcon(
@@ -400,7 +400,7 @@ export function WorkflowWithChat() {
               type='button'
               aria-label='Back to workflow'
               onClick={() => setStageFront('editor')}
-              className='absolute inset-x-4 top-2 z-30 flex h-[38px] items-start rounded-t-lg border border-[var(--border-1)] bg-[var(--bg)] px-3 transition-colors hover-hover:bg-[var(--surface-active)]'
+              className='absolute inset-x-4 top-2 z-30 flex h-[38px] items-start rounded-t-xl border border-[var(--border-1)] bg-[var(--bg)] px-3 transition-colors hover-hover:bg-[var(--surface-active)]'
             >
               <span className='flex h-[26px] min-w-0 items-center gap-1.5'>
                 <WorkflowIcon className='size-[12px] flex-shrink-0 text-[var(--text-icon)]' />