feat(cms): recover drafts and failed imports with verified UI workflows

src/components/admin/studio/import-source-diagnostics.test.tsx

@@ -0,0 +1,54 @@
+import { renderToStaticMarkup } from "react-dom/server";
+import { expect, it, vi } from "vitest";
+import { ImportSourceDiagnostics } from "./import-source-diagnostics";
+
+vi.mock("next-intl", () => ({
+	useTranslations: () => (key: string, args?: Record<string, unknown>) =>
+		`${key}${args?.status ?? ""}`,
+}));
+it("shows filenames, attempted addresses and distinct reasons inline", () => {
+	const html = renderToStaticMarkup(
+		<ImportSourceDiagnostics
+			check={{
+				classname: "chair",
+				revision: 1,
+				state: "missing",
+				alternatives: [],
+				attempts: [
+					{
+						file: "chair.swf",
+						url: "https://source.test/1/chair.swf",
+						state: "missing",
+						reason: "http",
+						status: 404,
+					},
+					{
+						file: "chair.nitro",
+						url: "https://source.test/chair.nitro",
+						state: "unknown",
+						reason: "timeout",
+					},
+				],
+			}}
+		/>,
+	);
+	expect(html).toContain("chair.swf");
+	expect(html).toContain("http404");
+	expect(html).toContain("timeout");
+	expect(html).toContain("https://source.test/1/chair.swf");
+	expect(html).not.toContain("href=");
+});
+it("does not invent diagnostics for earlier responses", () => {
+	expect(
+		renderToStaticMarkup(
+			<ImportSourceDiagnostics
+				check={{
+					classname: "chair",
+					revision: 1,
+					state: "missing",
+					alternatives: [],
+				}}
+			/>,
+		),
+	).toBe("");
+});