story-kit: merge 300_story_show_token_cost_badge_on_pipeline_board_work_items

frontend/src/api/client.ts

@@ -143,6 +143,20 @@ export interface SearchResult {
 	matches: number;
 }
 
+export interface AgentCostEntry {
+	agent_name: string;
+	input_tokens: number;
+	output_tokens: number;
+	cache_creation_input_tokens: number;
+	cache_read_input_tokens: number;
+	total_cost_usd: number;
+}
+
+export interface TokenCostResponse {
+	total_cost_usd: number;
+	agents: AgentCostEntry[];
+}
+
 export interface CommandOutput {
 	stdout: string;
 	stderr: string;
@@ -316,6 +330,13 @@ export const api = {
 			baseUrl,
 		);
 	},
+	getTokenCost(storyId: string, baseUrl?: string) {
+		return requestJson<TokenCostResponse>(
+			`/work-items/${encodeURIComponent(storyId)}/token-cost`,
+			{},
+			baseUrl,
+		);
+	},
 	/** Approve a story in QA, moving it to merge. */
 	approveQa(storyId: string) {
 		return callMcpTool("approve_qa", { story_id: storyId });