Support plain fast Codex toggle

[MagMueller]

Summary

• treat plain fast as the same as /fast
• keep fast from being swallowed by a live goal session
• label low reasoning as Fast in the inline model picker and add default effort reset

Tests

• /home/bux/.local/bin/ruff check agent/telegram_bot.py agent/test_telegram_bot.py
• /opt/bux/venv/bin/python -m unittest agent/test_telegram_bot.py

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Summary by cubic

Adds a plain "fast" toggle for Codex, refreshes the model picker with Fast/Medium/High/XHigh labels and a Default reset, and ensures the toggle works during live goal sessions.

• New Features

  • Typing "fast" now acts like "/fast" and switches Codex to low effort.
  • Model picker: effort labels use Fast/Medium/High/XHigh and include a "Default" button that clears custom effort.

• Bug Fixes

  • Prevents live goal sessions from swallowing the fast toggle.

^{Written for commit c48c808. Summary will update on new commits. Review in cubic}

[cubic-dev-ai]

No issues found across 2 files

_{Re-trigger cubic}