Add blog categories and default SUPER_ADMIN store scope to Mana Collection.

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

prisma/schema.prisma

@@ -126,6 +126,7 @@ model Store {
 
   products     Product[]
   categories   Category[]
+  blogCategories BlogCategory[]
   brands       Brand[]
   blogs        BlogPost[]
   orderItems   OrderItem[]
@@ -219,24 +220,44 @@ model ProductVariant {
   @@index([productId])
 }
 
+model BlogCategory {
+  id        String         @id @default(cuid())
+  storeId   String
+  store     Store          @relation(fields: [storeId], references: [id], onDelete: Cascade)
+  parentId  String?
+  parent    BlogCategory?  @relation("BlogCategoryTree", fields: [parentId], references: [id], onDelete: SetNull)
+  children  BlogCategory[] @relation("BlogCategoryTree")
+  nameFa    String
+  nameEn    String         @default("")
+  sortOrder Int            @default(0)
+  blogs     BlogPost[]
+
+  @@index([storeId])
+  @@index([parentId])
+  @@index([sortOrder])
+}
+
 model BlogPost {
-  id              String   @id @default(cuid())
+  id              String        @id @default(cuid())
   storeId         String
-  store           Store    @relation(fields: [storeId], references: [id], onDelete: Cascade)
+  store           Store         @relation(fields: [storeId], references: [id], onDelete: Cascade)
+  categoryId      String?
+  category        BlogCategory? @relation(fields: [categoryId], references: [id], onDelete: SetNull)
   title           String
-  summary         String   @default("")
-  body            String   @default("")
-  author          String   @default("")
+  summary         String        @default("")
+  body            String        @default("")
+  author          String        @default("")
   imageUrl        String?
   imageKey        String?
-  published       Boolean  @default(true)
+  published       Boolean       @default(true)
   metaTitle       String?
   metaDescription String?
   slug            String?
-  createdAt       DateTime @default(now())
-  updatedAt       DateTime @updatedAt
+  createdAt       DateTime      @default(now())
+  updatedAt       DateTime      @updatedAt
 
   @@index([storeId])
+  @@index([categoryId])
   @@index([published])
   @@index([slug])
 }