WebBrain 8.1.6 release

bugfixes

Release Notes for v2.0.0:
- Deep Verbose Fix: Switched from right-click to Shift+click on the verbose button to avoid Chrome interception.
- Agent Persistence Improvements:
- Increased maxSteps from 60 to 120.
- Increased Loop nudge→stop threshold from 2 to 4.
- Expanded Coordinate click window and attempts.
- Reduced Healthy call reset threshold to 3 for easier recovery.
- Refined nudge/stop messaging to encourage retries.
- Updated done() tool description to discourage premature termination.
- Added 2s retry for LLM errors to handle rate limits and transient network issues.