Add OTP-first signup and product catalog PDF uploads.

Signup verifies phone before password; existing Meshkee accounts keep their password. Products can attach an optional PDF catalog (max 2MB) via Pars Pack media.

Co-authored-by: Cursor <cursoragent@cursor.com>

prisma/schema.prisma

@@ -393,6 +393,7 @@ model Media {
   instructions          instructions[]
   workshops             workshops[]
   featuredProducts         Product[]                  @relation("ProductFeaturedMedia")
+  catalogProducts          Product[]                  @relation("ProductCatalogMedia")
   featuredUserProducts     UserProduct[]              @relation("UserProductFeaturedMedia")
   website_image_slot_items website_image_slot_items[]
   website_slider_slides    website_slider_slides[]
@@ -524,6 +525,7 @@ model Product {
   stockQuantity        Int?                         @map("stock_quantity")
   status               ContentStatus                @default(draft)
   featuredMediaId      BigInt?                      @map("featured_media_id")
+  catalogMediaId       BigInt?                      @map("catalog_media_id")
   sortOrder            Int                          @default(0) @map("sort_order")
   publishedAt          DateTime?                    @map("published_at") @db.Timestamptz(6)
   metadata             Json                         @default("{}")
@@ -541,6 +543,7 @@ model Product {
   brand                Brand?                       @relation(fields: [brandId], references: [id], onUpdate: NoAction)
   business             Business                     @relation(fields: [businessId], references: [id], onDelete: Cascade, onUpdate: NoAction)
   featuredMedia        Media?                       @relation("ProductFeaturedMedia", fields: [featuredMediaId], references: [id], onUpdate: NoAction)
+  catalogMedia         Media?                       @relation("ProductCatalogMedia", fields: [catalogMediaId], references: [id], onUpdate: NoAction)
   shoppingCardItems    ShoppingCardItem[]
   storeItem            StoreItem[]
 
@@ -549,6 +552,7 @@ model Product {
   @@index([brandId], map: "idx_products_brand_id")
   @@index([businessId, status], map: "idx_products_business_status")
   @@index([businessId, publishedAt(sort: Desc)], map: "idx_products_business_published")
+  @@index([catalogMediaId], map: "idx_products_catalog_media_id")
   @@map("products")
 }
 
@@ -1683,6 +1687,7 @@ model UserProduct {
 enum MediaType {
   image
   video
+  document
 
   @@map("media_type")
 }