fix: scope ActivationStep validation to current step only

The "Continue to Add-ons" button was unresponsive when selecting
scheduled activation because validate() ran full-form schema validation
(all steps), silently failing on incomplete fields from other steps.
Now only checks that a date is selected for scheduled activation.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/portal/src/features/services/components/sim/SimConfigureView.tsx

@@ -79,7 +79,6 @@ function SimConfigureStep(props: Omit<Props, "loading"> & { plan: NonNullable<Pr
           scheduledActivationDate={scheduledActivationDate}
           setScheduledActivationDate={setScheduledActivationDate}
           activationFee={activationFeeDetails}
-          validate={validate}
           onNext={() => setCurrentStep(3)}
           onBack={() => setCurrentStep(1)}
         />

apps/portal/src/features/services/components/sim/configure/steps/ActivationStep.tsx

@@ -13,12 +13,13 @@ export function ActivationStep({
   scheduledActivationDate,
   setScheduledActivationDate,
   activationFee,
-  validate,
   onNext,
   onBack,
 }: ActivationStepProps) {
   const handleContinue = () => {
-    if (activationType === "Scheduled" && !validate()) {
+    // Only validate that a date is selected for scheduled activation —
+    // full-form validation runs at checkout, not mid-wizard.
+    if (activationType === "Scheduled" && !scheduledActivationDate) {
       return;
     }
     onNext();

apps/portal/src/features/services/components/sim/configure/types.ts

@@ -35,7 +35,6 @@ export interface ActivationStepProps extends BaseStepProps {
   scheduledActivationDate: string;
   setScheduledActivationDate: (date: string) => void;
   activationFee?: ActivationFeeDetails | undefined;
-  validate: () => boolean;
 }
 
 export interface AddonsStepProps extends BaseStepProps {