story-kit: merge 339_story_web_ui_agent_assignment_dropdown_on_work_items

frontend/src/api/agents.test.ts

@@ -36,6 +36,7 @@ const sampleAgent: AgentInfo = {
 const sampleConfig: AgentConfigInfo = {
 	name: "coder",
 	role: "engineer",
+	stage: "coder",
 	model: "claude-sonnet-4-6",
 	allowed_tools: null,
 	max_turns: null,

frontend/src/api/agents.ts

@@ -31,6 +31,7 @@ export interface AgentEvent {
 export interface AgentConfigInfo {
 	name: string;
 	role: string;
+	stage: string | null;
 	model: string | null;
 	allowed_tools: string[] | null;
 	max_turns: number | null;