update subscription algorithm

apps/dashboard/src/app/sign-up/[[...sign-up]]/page.tsx

@@ -29,7 +29,7 @@ type SignupForm = {
   yearsActive: string
   plan: 'STARTER' | 'GROWTH' | 'PRO'
   billingPeriod: 'MONTHLY' | 'ANNUAL'
-  currency: 'MAD' | 'USD' | 'EUR'
+  currency: 'MAD'
   paymentProvider: 'AMANPAY' | 'PAYPAL'
 }
 
@@ -557,9 +557,8 @@ export default function SignUpPage() {
                     </button>
                   ))}
                 </div>
-                <div className="grid gap-4 sm:grid-cols-3">
+                <div className="grid gap-4 sm:grid-cols-2">
                   <LabeledSelect label={language === 'fr' ? 'Période de facturation' : language === 'ar' ? 'فترة الفوترة' : 'Billing period'} value={form.billingPeriod} options={['MONTHLY', 'ANNUAL']} labels={dict.billingPeriodOptions} onChange={(value) => setForm((current) => ({ ...current, billingPeriod: value as SignupForm['billingPeriod'] }))} />
-                  <LabeledSelect label={language === 'fr' ? 'Devise' : language === 'ar' ? 'العملة' : 'Currency'} value={form.currency} options={['MAD', 'USD', 'EUR']} onChange={(value) => setForm((current) => ({ ...current, currency: value as SignupForm['currency'] }))} />
                   <LabeledSelect label={language === 'fr' ? 'Prestataire principal' : language === 'ar' ? 'مزود الدفع الرئيسي' : 'Primary provider'} value={form.paymentProvider} options={['AMANPAY', 'PAYPAL']} labels={dict.paymentProviderOptions} onChange={(value) => setForm((current) => ({ ...current, paymentProvider: value as SignupForm['paymentProvider'] }))} />
                 </div>
                 <NavActions onBack={() => setStep(2)} onNext={() => setStep(4)} nextLabel={dict.continue} backLabel={dict.back} loadingLabel={dict.working} />
@@ -571,7 +570,7 @@ export default function SignUpPage() {
                 <SectionIntro title={dict.reviewTitle} body={dict.reviewBody} />
                 <div className="rounded-3xl border border-slate-200 bg-slate-50 p-5 text-sm text-slate-600">
                   <p><span className="font-semibold text-slate-900">{dict.reviewWorkspace}:</span> {form.companyName.fr || form.companyName.ar || dict.companyFallback}{form.companyName.fr && form.companyName.ar ? <span className="ml-2 text-slate-400">/ {form.companyName.ar}</span> : null}</p>
-                  <p className="mt-2"><span className="font-semibold text-slate-900">{dict.reviewPlan}:</span> {form.plan} · {dict.billingPeriodOptions[form.billingPeriod]} · {form.currency}</p>
+                  <p className="mt-2"><span className="font-semibold text-slate-900">{dict.reviewPlan}:</span> {form.plan} · {dict.billingPeriodOptions[form.billingPeriod]} · MAD</p>
                   <p className="mt-2"><span className="font-semibold text-slate-900">{dict.reviewOwnerEmail}:</span> {form.email || '—'}</p>
                   <p className="mt-2"><span className="font-semibold text-slate-900">{dict.reviewPhone}:</span> {form.companyPhone || '—'}</p>
                 </div>
@@ -741,7 +740,6 @@ function normalizeBillingPeriod(value: string | null): SignupForm['billingPeriod
   return value === 'ANNUAL' ? 'ANNUAL' : 'MONTHLY'
 }
 
-function normalizeCurrency(value: string | null): SignupForm['currency'] {
-  if (value === 'USD' || value === 'EUR' || value === 'MAD') return value
+function normalizeCurrency(_value: string | null): SignupForm['currency'] {
   return 'MAD'
 }