Refactor backend: extract async stream helper, direct tool registry, nudge_for_result via call_llm

Debug panel: full LLM call parity, show_html tool, drag-drop file upload

Add abort/stop feature and agentui CLI command

Fix imports: use relative imports throughout backend package

Add command center continuation, result nudge, input blocking, and prompt improvements

Rename notebooks→agents, Productive→AgentUI across full codebase

Centralize agent type registry into single source of truth

update

v0.20

v0.15

v0.14