WIP: Batch 3 — backfill frontend tests

- usePathCompletion: 16 tests (isFuzzyMatch, getCurrentPartial, hook behavior)
- api/client.ts: 9 tests (fetch mocks for all major endpoints, error handling)
- api/workflow.ts: 6 tests (record, acceptance, review queue, ensure)

Frontend tests: 13 → 44

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/api/workflow.test.ts

@@ -0,0 +1,113 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { workflowApi } from "./workflow";
+
+const mockFetch = vi.fn();
+
+beforeEach(() => {
+	vi.stubGlobal("fetch", mockFetch);
+});
+
+afterEach(() => {
+	vi.restoreAllMocks();
+});
+
+function okResponse(body: unknown) {
+	return new Response(JSON.stringify(body), {
+		status: 200,
+		headers: { "Content-Type": "application/json" },
+	});
+}
+
+function errorResponse(status: number, text: string) {
+	return new Response(text, { status });
+}
+
+describe("workflowApi", () => {
+	describe("recordTests", () => {
+		it("sends POST to /workflow/tests/record", async () => {
+			mockFetch.mockResolvedValueOnce(okResponse(true));
+
+			const payload = {
+				story_id: "story-29",
+				unit: [{ name: "t1", status: "pass" as const }],
+				integration: [],
+			};
+
+			await workflowApi.recordTests(payload);
+
+			expect(mockFetch).toHaveBeenCalledWith(
+				"/api/workflow/tests/record",
+				expect.objectContaining({ method: "POST" }),
+			);
+		});
+	});
+
+	describe("getAcceptance", () => {
+		it("sends POST and returns acceptance response", async () => {
+			const response = {
+				can_accept: true,
+				reasons: [],
+				warning: null,
+				summary: { total: 2, passed: 2, failed: 0 },
+				missing_categories: [],
+			};
+			mockFetch.mockResolvedValueOnce(okResponse(response));
+
+			const result = await workflowApi.getAcceptance({
+				story_id: "story-29",
+			});
+
+			expect(result.can_accept).toBe(true);
+			expect(result.summary.total).toBe(2);
+		});
+	});
+
+	describe("getReviewQueueAll", () => {
+		it("sends GET to /workflow/review/all", async () => {
+			mockFetch.mockResolvedValueOnce(okResponse({ stories: [] }));
+
+			const result = await workflowApi.getReviewQueueAll();
+
+			expect(mockFetch).toHaveBeenCalledWith(
+				"/api/workflow/review/all",
+				expect.objectContaining({}),
+			);
+			expect(result.stories).toEqual([]);
+		});
+	});
+
+	describe("ensureAcceptance", () => {
+		it("returns true when acceptance passes", async () => {
+			mockFetch.mockResolvedValueOnce(okResponse(true));
+
+			const result = await workflowApi.ensureAcceptance({
+				story_id: "story-29",
+			});
+
+			expect(result).toBe(true);
+		});
+
+		it("throws on error response", async () => {
+			mockFetch.mockResolvedValueOnce(
+				errorResponse(400, "Acceptance is blocked"),
+			);
+
+			await expect(
+				workflowApi.ensureAcceptance({ story_id: "story-29" }),
+			).rejects.toThrow("Acceptance is blocked");
+		});
+	});
+
+	describe("getReviewQueue", () => {
+		it("sends GET to /workflow/review", async () => {
+			mockFetch.mockResolvedValueOnce(
+				okResponse({ stories: [{ story_id: "s1", can_accept: true }] }),
+			);
+
+			const result = await workflowApi.getReviewQueue();
+
+			expect(result.stories).toHaveLength(1);
+			expect(result.stories[0].story_id).toBe("s1");
+		});
+	});
+});