af2a25bf87
- Add agent discovery step to cmdSetupInteractive flow - _promptAgentSelection: discover uwf-* binaries, auto-select if only one, prompt user to choose if multiple, show install hints if none found - mergeConfig: always write selected agent entry, update defaultAgent - Known agent labels for hermes, claude-code, cursor, builtin - 10 new tests for _agentNameFromBinary, _printAgentMenu, cmdSetup agent config Fixes #424