fix(tenancy): fix team CRUD bugs + add member integration tests

Store team page:
- Fix undefined user_id (API returns `id`, JS used `user_id`)
- Fix wrong URL path in updateMember (remove redundant storeCode)
- Fix update_member_role route passing wrong kwarg (new_role_id → new_role_name)
- Add update_member() service method for role_id + is_active updates
- Add :selected binding for role pre-selection in edit modal

Merchant team page:
- Add missing db.commit() on invite, update, and remove endpoints
- Fix forward-reference string type annotation on MerchantTeamInvite
- Add :selected binding for role pre-selection in edit modal

Shared fixes:
- Replace removed subscription_service.check_team_limit with usage_service
- Replace removed subscription_service.get_current_tier in email service
- Fix email config bool settings crashing on .lower() (value_type=boolean)

Tests: 15 new integration tests for store team member API endpoints.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/modules/tenancy/tests/unit/test_store_team_service.py

@@ -243,17 +243,29 @@ class TestStoreTeamServiceRemove:
     """Test suite for removing team members."""
 
     def test_remove_team_member_success(self, db, team_store, team_member):
-        """Test removing a team member."""
+        """Test removing a team member (soft delete)."""
         result = store_team_service.remove_team_member(
             db=db,
             store=team_store,
             user_id=team_member.user_id,
         )
         db.commit()
-        db.refresh(team_member)
 
+        # Verify soft-deleted (hidden from normal queries, visible with include_deleted)
+        from app.modules.tenancy.models import StoreUser
+
+        hidden = db.query(StoreUser).filter(StoreUser.id == team_member.id).first()
+        assert hidden is None  # Filtered out by soft-delete
+
+        visible = (
+            db.query(StoreUser)
+            .execution_options(include_deleted=True)
+            .filter(StoreUser.id == team_member.id)
+            .first()
+        )
+        assert visible is not None
+        assert visible.deleted_at is not None
         assert result is True
-        assert team_member.is_active is False
 
     def test_remove_owner_raises_error(self, db, team_store, store_owner):
         """Test removing owner raises exception."""