重构账单查询sql

Service/AGENTS.md

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+# SERVICE LAYER KNOWLEDGE BASE
+
+**Generated:** 2026-01-28
+**Parent:** EmailBill/AGENTS.md
+
+## OVERVIEW
+Business logic layer with job scheduling, email processing, and application services.
+
+## STRUCTURE
+```
+Service/
+├── GlobalUsings.cs              # Common imports
+├── Jobs/                        # Background jobs
+│   ├── BudgetArchiveJob.cs      # Budget archiving
+│   ├── DbBackupJob.cs           # Database backups
+│   ├── EmailSyncJob.cs          # Email synchronization
+│   └── PeriodicBillJob.cs       # Periodic bill processing
+├── EmailServices/               # Email processing
+│   ├── EmailHandleService.cs    # Email handling logic
+│   ├── EmailFetchService.cs     # Email fetching
+│   ├── EmailSyncService.cs      # Email synchronization
+│   └── EmailParse/              # Email parsing services
+├── AppSettingModel/             # Configuration models
+├── Budget/                      # Budget services
+└── [Various service classes]    # Core business services
+```
+
+## WHERE TO LOOK
+| Task | Location | Notes |
+|------|----------|-------|
+| Background jobs | Jobs/ | Scheduled tasks, cron patterns |
+| Email processing | EmailServices/ | Email parsing, handling, sync |
+| Budget logic | Budget/ | Budget calculations, stats |
+| Configuration | AppSettingModel/ | Settings models, validation |
+| Core services | *.cs | Main business logic |
+
+## CONVENTIONS
+- Service classes end with "Service" suffix
+- Jobs inherit from appropriate base job classes
+- Use IDateTimeProvider for time operations
+- Async/await for I/O operations
+- Dependency injection via constructor
+
+## ANTI-PATTERNS (THIS LAYER)
+- Never access database directly (use repositories)
+- Don't return domain entities to controllers (use DTOs)
+- Avoid long-running operations in main thread
+- No hardcoded configuration values
+- Don't mix service responsibilities
+
+## UNIQUE STYLES
+- Email parsing with multiple format handlers
+- Background job patterns with error handling
+- Configuration models with validation attributes
+- Service composition patterns