chore(home): mirror from kalinamall (9883e6a) with papatramp URLs

backend/app/models/mobile_settings.py

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+from sqlalchemy import Boolean, Integer, String
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.database import Base
+
+MOBILE_SETTINGS_ROW_ID = 1
+
+LOGIN_MODE_PASSWORD = "password"
+LOGIN_MODE_CODE_ONLY = "code_only"
+LOGIN_MODES = frozenset({LOGIN_MODE_PASSWORD, LOGIN_MODE_CODE_ONLY})
+
+
+class MobileSettings(Base):
+    """Singleton: глобальные настройки мобильного клиента Seaca."""
+
+    __tablename__ = "mobile_settings"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    devices_allowed: Mapped[bool] = mapped_column(Boolean, default=False)
+    max_devices_per_user: Mapped[int] = mapped_column(Integer, default=3)
+    min_app_version: Mapped[str | None] = mapped_column(String(32), nullable=True)