feat(modality)!: SnapOtter 2.0 phase 3 modality framework: media/doc engines, pool routing, display modes (#218)

tests/unit/doc-engine/binaries.test.ts

@@ -0,0 +1,9 @@
+import { qpdfAvailable, sofficeAvailable } from "@snapotter/doc-engine";
+import { describe, expect, it } from "vitest";
+
+describe("doc-engine binary resolution", () => {
+  it("availability checks return booleans without throwing", () => {
+    expect(typeof qpdfAvailable()).toBe("boolean");
+    expect(typeof sofficeAvailable()).toBe("boolean");
+  });
+});