Remove obsolete phase completion summaries and demo test scripts - Deleted `PHASE1_COMPLETION_SUMMARY.md`, `PHASE2_COMPLETION_SUMMARY.md`, `PHASE3_COMPLETION_SUMMARY.md`, and associated demo test scripts to streamline the codebase and eliminate unused documentation. This cleanup supports ongoing refactoring efforts and enhances overall project maintainability.

Implement Phase 3 enhancements for candidate pool persistence in recommendation agents - Introduced `SessionManagerService` to support candidate pool generation and retrieval across `UnifiedCandidateGenerator`, `DiscoveryAgent`, `JudgeAgent`, and `GenreMoodAgent`. Updated agent initialization to accept session manager, enabling efficient follow-up query handling and improved user experience. Added methods for generating and persisting large candidate pools, as well as retrieving candidates from persisted pools, ensuring better performance and responsiveness in music recommendations. This update aims to streamline agent logic and enhance the overall recommendation system.

Enhance intent management and context handling in the recommendation system - Introduced `SessionManagerService` and `IntentOrchestrationService` to centralize intent processing and improve follow-up query handling. Refactored `EnhancedRecommendationService` to integrate these new services, ensuring agents receive a clear "effective intent" for better decision-making. Updated scoring logic in `ComprehensiveQualityScorer` for improved robustness. This update aims to streamline agent logic, enhance user experience with follow-ups, and support ongoing refactoring efforts.

Remove obsolete test scripts for follow-up behavior, detection fix, history filtering, hybrid context, Kendrick follow-up, simple extraction, and state management - Deleted multiple test files to streamline the codebase and eliminate unused tests. This cleanup supports ongoing refactoring efforts and enhances overall project maintainability.

Add autopep8 as a dependency for code formatting - Updated pyproject.toml to include autopep8 version 2.3.2 for improved code style consistency. Modified uv.lock to reflect the new dependency and its requirements. This update aims to enhance code maintainability and adherence to style guidelines.

Enhance intent-aware recommendation system design and scoring logic - Updated the design document to introduce a new query type for "by artist" intent, detailing user goals, scoring strategies, and agent workflows. Refactored scoring logic in the quality scorer and ranking logic to accommodate exploration preferences and artist alias handling. Improved candidate generation for artist-specific queries and refined genre filtering methods to support hybrid queries. This update aims to better align system behavior with user intent and enhance overall recommendation accuracy.

Update configuration files and remove obsolete test scripts - Increased line length limit in `pyproject.toml`, `test_hybrid_intent_final.py`, `test_hybrid_intent_fix.py`, `test_hybrid_subtypes.py`, `test_intent_fix.py`, `test_quick_hybrid.py`, `test_ui_improvements.py` to enhance code formatting flexibility. Deleted unused test files to streamline the codebase and improve maintainability. This cleanup supports ongoing refactoring efforts and enhances overall project structure.

Update .gitignore and remove obsolete cleanup documentation - Added `.gradio` and `tests/data/cache` to `.gitignore` to prevent unnecessary file tracking. Deleted outdated cleanup documentation files (`AGENT_CLEANUP_COMPLETION.md` and `CLEANUP_PLAN.md`) to streamline the codebase and remove obsolete references. This cleanup supports ongoing refactoring efforts and enhances overall project maintainability.

Remove obsolete test files and enhance agent initialization - Deleted unused test files `test_backend_fixes.py` and `test_query_fix.py` to streamline the codebase. Updated agent initialization in `EnhancedRecommendationService` to include rate limiting for improved API management and performance. This cleanup supports ongoing refactoring efforts and enhances the overall structure of the project.

Remove obsolete test files and refactor agent imports - Deleted unused test files for `test_fix.py` and `test_smart_context.py`. Updated agent imports in `__init__.py` and other files to streamline the codebase and improve maintainability. This cleanup supports ongoing refactoring efforts and enhances the overall structure of the project.