[vinayagg]

Summary

• Rename AI connections to AI Models and keep configured models above the picker.
• Populate Local Codex choices from the signed-in Codex account catalog, let users select and enable models in one step, expose their supported effort levels, and remove the hidden Reconnect action.
• Keep Bees AI models configurable when credits are unavailable, while retaining the spending guard for runs.
• Simplify Credits to show balance, configuration status, and the server admin link; remove client billing controls.

Checks

• npm run check
• git diff --cached --check