Major changes

prisma/schema.prisma

@@ -0,0 +1,44 @@
+// This is your Prisma schema file,
+// learn more about it in the docs: https://pris.ly/d/prisma-schema
+
+generator client {
+  provider = "prisma-client-js"
+}
+
+datasource db {
+  provider = "postgresql"
+}
+
+model Article {
+  id        String   @id @default(cuid())
+  slug      String   @unique // URL-friendly title (e.g., "Albert_Einstein")
+  title     String   // Display title
+  content   String   @db.Text // Full markdown content
+  imageUrl  String?  // Main image URL
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+  history   ArticleHistory[]
+
+  @@index([slug])
+}
+
+model ArticleHistory {
+  id         String   @id @default(cuid())
+  articleId  String
+  article    Article  @relation(fields: [articleId], references: [id], onDelete: Cascade)
+  oldContent String   @db.Text
+  newContent String   @db.Text
+  reason     String   // AI reason or "Initial article"
+  createdAt  DateTime @default(now())
+
+  @@index([articleId])
+  @@index([createdAt])
+}
+
+model Search {
+  id        String   @id @default(cuid())
+  query     String
+  createdAt DateTime @default(now())
+
+  @@index([createdAt])
+}