chore: refactor crypto service tests for readability and lint compliance

backend/src/crypto/crypto.service.spec.ts

@@ -7,11 +7,13 @@ jest.mock("@noble/post-quantum/ml-kem.js", () => ({
 			publicKey: new Uint8Array(1184),
 			secretKey: new Uint8Array(2400),
 		})),
-		encapsulate: jest.fn((pk: Uint8Array) => ({
+		encapsulate: jest.fn((_pk: Uint8Array) => ({
 			cipherText: new Uint8Array(1088),
 			sharedSecret: new Uint8Array(32),
 		})),
-		decapsulate: jest.fn((ct: Uint8Array, sk: Uint8Array) => new Uint8Array(32)),
+		decapsulate: jest.fn(
+			(_ct: Uint8Array, _sk: Uint8Array) => new Uint8Array(32),
+		),
 	},
 }));
 
@@ -51,7 +53,10 @@ jest.mock("jose", () => ({
 		if (jws.includes("tampered") || jws.split(".").length !== 3) {
 			throw new Error("Tampered or invalid content");
 		}
-		const payload = jws === "mocked.jws.token" ? "Important document content" : "Original content";
+		const payload =
+			jws === "mocked.jws.token"
+				? "Important document content"
+				: "Original content";
 		return Promise.resolve({
 			payload: new TextEncoder().encode(payload),
 		});
@@ -149,7 +154,7 @@ describe("CryptoService", () => {
 		it("should fail to verify tampered content", async () => {
 			const content = "Original content";
 			const jws = await service.signContent(content);
-			const parts = jws.split(".");
+			const _parts = jws.split(".");
 			// Tamper with the payload (middle part)
 			const tamperedJws = "this.is.tampered";