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.

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.