- browser_agent.py: use get_anthropic_client instead of raw api_key, fix model map for 9Router
- credentials.py + agent_manager.py: subscription (9Router) checked before API key everywhere
- main.py: clean browser-agent endpoint, no credential params
- tools_lib.py: when uvx not found, fall back to pip-installed binary from venv
- requirements.txt: add google-workspace-mcp so it works without uvx