- Move DB operations from routes/admin.py to services/admin.py (get_logs_context, query_summary_statuses, retry_failed, delete/reset operations)
- Add services/jobs.py with Job/JobEvent-based async job queue (create_job, run_job, enqueue_job)
- Add services/derived.py with FTS5 reindex and paper index deletion helpers
- Refactor scheduler to use job queue instead of direct pipeline calls
- Add heartbeat_at/expires_at to TaskLock for lock health tracking
- Remove DESIGN_REVIEW.md
- Update tests: remove redundant integration tests, add unit tests for new services
- Split summarizer into summary_generator and summary_persister modules
- Refactor pdf_image_extractor to two-phase pipeline with PicoDet layout detection
- Add layout_detector service for PicoDet-S_layout_3cls integration
- Add exceptions module with ConflictError and NotFoundError
- Improve admin dashboard with better statistics and task management
- Add design review document with system optimization suggestions
- Add new tests for crawler, pdf_downloader, pipeline, and summary_utils
- Update dependencies and configuration
- Clean up dead code and improve error handling
- Replace image_extractor with pdf_image_extractor service
- Enhance pi_client with expanded API capabilities
- Improve summarizer service with additional features
- Update admin routes with more endpoints
- Add login page template
- Enhance detail page with comprehensive layout
- Improve search and trends pages
- Update base template with additional elements
- Refactor tests for better coverage
- Add validate_summary script
- Update project configuration and dependencies
- Add POST /admin/crawl with TaskLock-based reentrancy guard
- Add POST /admin/cleanup (tmp files older than 24h) with CrawlLog
- Add POST /admin/delete with date range and 'DELETE' confirm token
- Add GET /admin/logs (paginated CrawlLog + DataDeleteJob viewer)
- Add app/services/cleaner.py (cleanup_tmp, delete_papers_by_date_range)
- Add app/services/scheduler.py (APScheduler daily crawl/cleanup jobs)
- Wire scheduler startup/shutdown hooks in app/main.py
- Add admin nav link in base.html and APP_HOST security warning
- Add apscheduler>=3.10 dependency
- Add tests/test_admin_phase4.py covering the new endpoints
- Add /admin routes for manual trigger and status inspection
- Add summarizer service with batch/single summary support
- Add summarize CLI command (single arxiv_id or batch pending)
- Register admin router in main app
- Add tests for summarizer
- Add FastAPI app with paper browsing UI and REST API
- Add crawler service and database models
- Add scripts for DB init and manual crawl
- Add docs (api-and-ui, data-model, services)
- Add requirements and project config
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