feat: add SQL query tool, platform debug, loyalty settings, and multi-module improvements

- Add admin SQL query tool with saved queries, schema explorer presets,
  and collapsible category sections (dev_tools module)
- Add platform debug tool for admin diagnostics
- Add loyalty settings page with owner-only access control
- Fix loyalty settings owner check (use currentUser instead of window.__userData)
- Replace HTTPException with AuthorizationException in loyalty routes
- Expand loyalty module with PIN service, Apple Wallet, program management
- Improve store login with platform detection and multi-platform support
- Update billing feature gates and subscription services
- Add store platform sync improvements and remove is_primary column
- Add unit tests for loyalty (PIN, points, stamps, program services)
- Update i18n translations across dev_tools locales

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/modules/loyalty/models/merchant_settings.py

@@ -6,6 +6,8 @@ Admin-controlled settings that apply to a merchant's loyalty program.
 These settings are managed by platform administrators, not stores.
 """
 
+import enum
+
 from sqlalchemy import (
     Boolean,
     Column,
@@ -20,7 +22,7 @@ from app.core.database import Base
 from models.database.base import TimestampMixin
 
 
-class StaffPinPolicy(str):
+class StaffPinPolicy(str, enum.Enum):
     """Staff PIN policy options."""
 
     REQUIRED = "required"  # Staff PIN always required