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/billing/services/stripe_service.py

@@ -311,6 +311,7 @@ class StripeService:
         trial_days: int | None = None,
         quantity: int = 1,
         metadata: dict | None = None,
+        platform_id: int | None = None,
     ) -> stripe.checkout.Session:
         """
         Create a Stripe Checkout session for subscription signup.
@@ -324,6 +325,7 @@ class StripeService:
             trial_days: Optional trial period
             quantity: Number of items (default 1)
             metadata: Additional metadata to store
+            platform_id: Platform ID (from JWT or caller). Falls back to DB lookup.
 
         Returns:
             Stripe Checkout Session object
@@ -334,7 +336,8 @@ class StripeService:
         from app.modules.tenancy.services.platform_service import platform_service
         from app.modules.tenancy.services.team_service import team_service
 
-        platform_id = platform_service.get_primary_platform_id_for_store(db, store.id)
+        if platform_id is None:
+            platform_id = platform_service.get_first_active_platform_id_for_store(db, store.id)
         subscription = None
         if store.merchant_id and platform_id:
             subscription = (