koan

docs(memory): refresh memory bank for pydantic-ai era (add M-series notes, drop stale claude-sdk notes)

docs: rewrite architecture, agent-protocol, ipc, projections, etc. for pydantic-ai migration

feat(frontend): refresh settings, usage gauge, header and new run form for new agent layer

test: update suite for pydantic-ai agent layer; drop legacy runner/permissions/probe/MCP tests

refactor: remove legacy claude/command_line agents, CLI runners, probe, permissions