- Updated AGENTS.md to clarify SSO wallet integration and error handling for account status.
- Refactored date handling in AdminReportQueryService and related classes to use precise date filtering for financial reports.
- Improved query logic in AdminDashboardSnapshotBuilder, AgentDashboardOverviewBuilder, and SiteDashboardOverviewBuilder to ensure accurate activity statistics based on business dates.
- Changed super admin detection from role-based to `is_super_admin` flag in AdminUser model
- Added `requireDefaultAdminSiteId()` method to throw validation error when no integration site exists
- Enhanced site deletion to migrate platform role bindings to fallback site and auto-delete site-specific admin accounts
- Made agent line code optional with auto-generation fallback using `{site_code}-agent-{counter}` format
