Add tests and enhance local draft storage handling

tests/unit/package-scripts.test.ts

@@ -0,0 +1,24 @@
+import { readFileSync } from "node:fs";
+
+import { describe, expect, it } from "vitest";
+
+interface PackageManifest {
+  scripts?: Record<string, string>;
+}
+
+function readPackageManifest(): PackageManifest {
+  return JSON.parse(readFileSync(new URL("../../package.json", import.meta.url), "utf8")) as PackageManifest;
+}
+
+describe("package scripts", () => {
+  it("exposes the expected verification script contract", () => {
+    const packageManifest = readPackageManifest();
+
+    expect(packageManifest.scripts).toBeDefined();
+    expect(packageManifest.scripts?.["test"]).toBeDefined();
+    expect(packageManifest.scripts?.["test:browser"]).toBeDefined();
+    expect(packageManifest.scripts?.["test:e2e"]).toBeDefined();
+    expect(packageManifest.scripts?.["typecheck"]).toBeDefined();
+    expect(packageManifest.scripts?.["test:typecheck"]).toBeDefined();
+  });
+});