ADD: added admin panel and archiv mandates

prisma/schema.prisma

@@ -8,18 +8,42 @@ datasource db {
   shadowDatabaseUrl = env("SHADOW_DATABASE_URL")
 }
 
+enum UserRole {
+  USER
+  ADMIN
+}
+
 model User {
-  id           String    @id @default(cuid())
-  email        String    @unique
+  id           String     @id @default(cuid())
+  email        String     @unique
+  username     String     @unique
   passwordHash String
   name         String
-  createdAt    DateTime  @default(now())
-  updatedAt    DateTime  @updatedAt
+  role         UserRole   @default(USER)
+  createdAt    DateTime   @default(now())
+  updatedAt    DateTime   @updatedAt
   companies    Company[]
+  auditLogs    AuditLog[]
 
   @@map("users")
 }
 
+model AuditLog {
+  id        String   @id @default(cuid())
+  userId    String?
+  user      User?    @relation(fields: [userId], references: [id], onDelete: SetNull)
+  action    String
+  entity    String?
+  entityId  String?
+  metadata  Json?
+  ipAddress String?
+  createdAt DateTime @default(now())
+
+  @@index([userId])
+  @@index([createdAt])
+  @@map("audit_logs")
+}
+
 model Company {
   id              String     @id @default(cuid())
   name            String
@@ -39,6 +63,8 @@ model Company {
   invoicePrefix   String     @default("RE")
   invoiceSequence Int        @default(0)
   kleinunternehmer Boolean   @default(false)
+  archived        Boolean    @default(false)
+  archivedAt      DateTime?
   userId          String
   user            User       @relation(fields: [userId], references: [id], onDelete: Cascade)
   customers       Customer[]
@@ -97,6 +123,7 @@ enum InvoiceStatus {
   SENT
   PAID
   CANCELLED
+  DELETED
 }
 
 model InvoiceItem {