Consolidates the incremental refactor work into a single change set: modular web tools (api/web_tools), native Anthropic request building and SSE block policy, OpenAI conversion and error handling, provider transports and rate limiting, messaging handler and tree queue, safe logging, smoke tests, and broad test coverage.
- Introduced `plans_directory` parameter in `CLISessionManager`, `CLISession`, and updated related methods to handle plan files.
- Updated `api/app.py` to pass the plans directory to the CLI session manager.
- Added a new test in `test_cli.py` to verify that the `--settings plansDirectory` argument is included when starting a task with a specified plans directory.
