style(payment-setup): drop ColumnsLayout wrapper

app/pages/member/payment-setup.vue

@@ -6,8 +6,7 @@
         :subtitle="targetTier ? `Upgrading to $${targetTier}/month` : 'Payment setup'"
       />
 
-      <ColumnsLayout cols="1">
-        <PageSection>
+      <PageSection>
           <div v-if="step === 'loading'" class="status-block">
             <p>Preparing payment setup…</p>
           </div>
@@ -43,8 +42,7 @@
           <div v-else-if="step === 'success'" class="status-block">
             <p>Payment setup complete. Redirecting to your account…</p>
           </div>
-        </PageSection>
-      </ColumnsLayout>
+      </PageSection>
     </ClientOnly>
   </PageShell>
 </template>