style: ui readability refactor v1.2.2 (removed uppercase, tracking, increased font sizes)

backend/models.py

@@ -10,6 +10,7 @@ class User(Base):
     username = Column(String, unique=True, index=True)
     hashed_password = Column(String, nullable=True) # Nullable for LDAP or legacy users
     role = Column(String, default="user")  # 'admin' or 'user'
+    origin = Column(String, default="local") # 'local' or 'ldap'
     
     audit_logs = relationship("AuditLog", back_populates="user")