feat: 支持教学案例展示功能

packages/server/prisma/schema.prisma

@@ -691,3 +691,31 @@ model ProductStockChange {
   @@index([productId, createdAt])
   @@map("product_stock_changes")
 }
+
+// Public teaching stories never reference private ProgressPhoto records.
+model TeachingCase {
+  id               String   @id @default(cuid())
+  title            String   @db.VarChar(80)
+  displayName      String   @db.VarChar(30)
+  lessonCount      Int
+  background       String   @db.VarChar(500)
+  achievement      String   @db.VarChar(1000)
+  frames           Json
+  sortOrder        Int      @default(0)
+  published        Boolean  @default(false)
+  consentConfirmed Boolean  @default(false)
+  consentNote      String   @db.VarChar(500)
+  consentedAt      DateTime?
+  version          Int      @default(1)
+  createdAt        DateTime @default(now())
+  updatedAt        DateTime @updatedAt
+
+  @@index([published, sortOrder, createdAt])
+}
+
+model TeachingCaseAsset {
+  id        String   @id @default(cuid())
+  objectKey String   @unique @db.VarChar(255)
+  ready     Boolean  @default(false)
+  createdAt DateTime @default(now())
+}