fix(settings): restore header shell on workspace credit-usage page (#5663)

apps/sim/app/workspace/[workspaceId]/settings/billing/credit-usage/layout.tsx

@@ -0,0 +1,19 @@
+import {
+  SettingsHeaderProvider,
+  SettingsHeaderShell,
+} from '@/app/workspace/[workspaceId]/settings/components/settings-header/settings-header'
+
+/**
+ * Credit usage is a static route outside `[section]`, so it does not inherit
+ * `SettingsSectionLayout`'s chrome. `CreditUsageView` and its loading fallback
+ * render through `SettingsPanel`, which only registers header config into the
+ * `SettingsHeaderProvider` context — without this shell the page has no header
+ * bar, title, or scroll region.
+ */
+export default function CreditUsageLayout({ children }: { children: React.ReactNode }) {
+  return (
+    <SettingsHeaderProvider>
+      <SettingsHeaderShell>{children}</SettingsHeaderShell>
+    </SettingsHeaderProvider>
+  )
+}