## Changes
- Add system account report aggregation APIs in reporting-service
- Add internal statistics APIs in wallet-service, reward-service, authorization-service
- Add system accounts tab in admin-web statistics page
- Enhanced metadata in reward entries for traceability
## Backend Changes
- wallet-service: Add offline settlement summary and system accounts balances APIs
- reward-service: Add expired rewards summary API
- authorization-service: Add fixed accounts list, region accounts summary APIs
- reporting-service: Add HTTP clients and aggregation service for system account reports
## Frontend Changes
- admin-web: Add SystemAccountsTab component with fixed accounts, region summaries,
offline settlement stats, and expired rewards display
## Rollback Instructions
Each file includes rollback comments with [2026-01-04] tag marking new additions.
To rollback: delete files marked as new, remove code sections marked with date comments.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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