Initial commit

backend/app/entities/user.py

@@ -0,0 +1,15 @@
+"""Domain entity: User (login account, linked 1:1 to PersonalData)."""
+
+from dataclasses import dataclass
+from datetime import datetime
+from uuid import UUID
+
+
+@dataclass
+class User:
+    id: UUID
+    personal_data_uuid: UUID  # FK to PersonalData; workspace derived from it
+    email: str
+    hashed_password: str  # argon2 hash; never plain SHA
+    created_at: datetime
+    is_active: bool = True