Shared primitives (Field, ToggleField, ToggleWithNumber, CollapsibleSection,
DraftInput, DraftTextarea, DraftNumberInput, HintIcon, help text, adapterLabels,
roleLabels) extracted into agent-config-primitives.tsx.
AgentConfigForm is a dual-mode form supporting both create (controlled values)
and edit (save-on-blur per field) modes, used by NewAgentDialog and AgentDetail.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
