refactor: rename marketplace to storefront across the entire monorepo

Comprehensive rename of all marketplace references to storefront:
- API module: apps/api/src/modules/marketplace/ → storefront/
- Components: MarketplaceHeader → StorefrontHeader, MarketplaceShell →
  StorefrontShell, MarketplaceFooter → StorefrontFooter
- Types: marketplace-homepage.ts → storefront-homepage.ts
- Test files: employee-marketplace-* → employee-storefront-*
- All source code identifiers, imports, route paths, and strings
- Documentation (docs/), CI config (.gitlab-ci.yml), scripts
- Dashboard, admin, storefront workspace references
- Prisma field names preserved (isListedOnMarketplace, marketplaceRating,
  marketplaceFunnelEvent) as they map to database schema

Validation:
- API type-check: 0 errors
- Storefront type-check: 0 errors
- Dashboard type-check: 0 errors
- Full monorepo type-check: only pre-existing admin TS18046

apps/dashboard/src/app/(dashboard)/settings/page.tsx

@@ -80,7 +80,7 @@ export default function SettingsPage() {
       save: 'Saving…',
       saveBrand: 'Save brand',
       brandProfile: 'Brand and public profile',
-      brandProfileDesc: 'Control how your company appears on the marketplace and public booking site.',
+      brandProfileDesc: 'Control how your company appears on the storefront and public booking site.',
       payments: 'Rental payment methods',
       paymentsDesc: 'Configure how renters pay your company on the public booking site.',
       savePayments: 'Save payments',
@@ -104,7 +104,7 @@ export default function SettingsPage() {
       contractLanguage: 'Contract language',
       whatsapp: 'WhatsApp number',
       brandColor: 'Brand color',
-      listedMarketplace: 'Listed on marketplace',
+      listedStorefront: 'Listed on storefront',
       logoUpload: 'Logo upload',
       heroUpload: 'Hero image upload',
       uploading: 'Uploading…',
@@ -155,7 +155,7 @@ export default function SettingsPage() {
       save: 'Enregistrement…',
       saveBrand: 'Enregistrer la marque',
       brandProfile: 'Marque et profil public',
-      brandProfileDesc: 'Contrôlez l’affichage de votre entreprise sur la marketplace et le site de réservation.',
+      brandProfileDesc: 'Contrôlez l’affichage de votre entreprise sur la storefront et le site de réservation.',
       payments: 'Méthodes de paiement location',
       paymentsDesc: 'Configurez comment les clients paient votre entreprise.',
       savePayments: 'Enregistrer les paiements',
@@ -179,7 +179,7 @@ export default function SettingsPage() {
       contractLanguage: 'Langue du contrat',
       whatsapp: 'Numéro WhatsApp',
       brandColor: 'Couleur de marque',
-      listedMarketplace: 'Publié sur la marketplace',
+      listedStorefront: 'Publié sur la storefront',
       logoUpload: 'Logo',
       heroUpload: 'Image principale',
       uploading: 'Téléversement…',
@@ -254,7 +254,7 @@ export default function SettingsPage() {
       contractLanguage: 'لغة العقد',
       whatsapp: 'رقم واتساب',
       brandColor: 'لون العلامة',
-      listedMarketplace: 'مدرج في السوق',
+      listedStorefront: 'مدرج في السوق',
       logoUpload: 'رفع الشعار',
       heroUpload: 'رفع صورة الواجهة',
       uploading: 'جارٍ الرفع…',
@@ -597,7 +597,7 @@ export default function SettingsPage() {
               <div className="flex items-center gap-4">
                 <label className="flex items-center gap-2 text-sm font-medium text-slate-700">
                   <input type="checkbox" checked={brand.isListedOnMarketplace} onChange={(event) => setBrand((current) => current ? { ...current, isListedOnMarketplace: event.target.checked } : current)} />
-                  {copy.listedMarketplace}
+                  {copy.listedStorefront}
                 </label>
               </div>
             </div>