feat(i18n): add localized navigation and news translations

packages/db/prisma/schema.prisma

@@ -16,6 +16,22 @@ model Post {
   status    String
   createdAt DateTime @default(now())
   updatedAt DateTime @updatedAt
+  translations PostTranslation[]
+}
+
+model PostTranslation {
+  id        String   @id @default(uuid())
+  postId    String
+  locale    String
+  title     String
+  excerpt   String?
+  body      String
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+  post      Post     @relation(fields: [postId], references: [id], onDelete: Cascade)
+
+  @@unique([postId, locale])
+  @@index([locale])
 }
 
 model User {
@@ -315,6 +331,7 @@ model NavigationItem {
   page      Page?            @relation(fields: [pageId], references: [id], onDelete: SetNull)
   parent    NavigationItem?  @relation("NavigationItemParent", fields: [parentId], references: [id], onDelete: Cascade)
   children  NavigationItem[] @relation("NavigationItemParent")
+  translations NavigationItemTranslation[]
 
   @@index([menuId])
   @@index([pageId])
@@ -322,6 +339,19 @@ model NavigationItem {
   @@unique([menuId, parentId, sortOrder, label])
 }
 
+model NavigationItemTranslation {
+  id               String         @id @default(uuid())
+  navigationItemId String
+  locale           String
+  label            String
+  createdAt        DateTime       @default(now())
+  updatedAt        DateTime       @updatedAt
+  navigationItem   NavigationItem @relation(fields: [navigationItemId], references: [id], onDelete: Cascade)
+
+  @@unique([navigationItemId, locale])
+  @@index([locale])
+}
+
 model Customer {
   id          String       @id @default(uuid())
   name        String