feat: implement secure admin authentication system with JWT sessions, middleware protection, and Prisma schema initialization

prisma/schema.prisma

@@ -0,0 +1,68 @@
+generator client {
+  provider = "prisma-client-js"
+}
+
+datasource db {
+  provider = "postgresql"
+  url      = env("DATABASE_URL")
+}
+
+model User {
+  id            String   @id @default(uuid()) @db.Uuid
+  email         String   @unique
+  passwordHash  String   @map("password_hash")
+  name          String
+
+  @@map("users")
+}
+
+model Project {
+  id            String         @id @default(uuid()) @db.Uuid
+  title         String
+  slug          String         @unique
+  description   String         @db.Text
+  imageUrl      String?        @map("image_url")
+  repoUrl       String?        @map("repo_url")
+  liveUrl       String?        @map("live_url")
+  category      String
+  isPublished   Boolean        @default(false) @map("is_published")
+  createdAt     DateTime       @default(now()) @map("created_at")
+  
+  skills        ProjectSkill[]
+
+  @@map("projects")
+}
+
+model Skill {
+  id            String         @id @default(uuid()) @db.Uuid
+  name          String
+  iconName      String?        @map("icon_name")
+  category      String
+  
+  projects      ProjectSkill[]
+
+  @@map("skills")
+}
+
+// Explicit Join Table based on ERD
+model ProjectSkill {
+  projectId     String   @map("project_id") @db.Uuid
+  skillId       String   @map("skill_id") @db.Uuid
+  
+  project       Project  @relation(fields: [projectId], references: [id], onDelete: Cascade)
+  skill         Skill    @relation(fields: [skillId], references: [id], onDelete: Cascade)
+
+  @@id([projectId, skillId])
+  @@map("project_skills")
+}
+
+model Message {
+  id            String   @id @default(uuid()) @db.Uuid
+  senderName    String   @map("sender_name")
+  senderEmail   String   @map("sender_email")
+  content       String   @db.Text
+  isRead        Boolean  @default(false) @map("is_read")
+  createdAt     DateTime @default(now()) @map("created_at")
+
+  @@map("messages")
+}