Delete USDT-M futures support since the user's Binance API key does not
support futures trading. This simplifies the CLI to spot-only:
- Remove futures client wrapper (um_futures_client.py)
- Remove futures trade commands and close position logic
- Simplify account service to spot-only (no market_type field)
- Remove futures references from opportunity service
- Update README and tests to reflect spot-only architecture
- Bump version to 2.0.7
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Add with_spinner context manager with cyan Braille animation for human mode.
- Wrap all query/execution commands in cli.py with loading spinners.
- Integrate shtab: auto-install shell completions during init for zsh/bash.
- Add `completion` subcommand for manual script generation.
- Fix stale output_format default in DEFAULT_CONFIG (json → tui).
- Add help descriptions to all second-level subcommands.
- Version 2.0.4.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>