fix: clear stale nordvpn disconnect state

skills/nordvpn-client/scripts/nordvpn-client.test.js

@@ -15,6 +15,8 @@ module.exports = {
     typeof buildWireguardConfig === "function" ? buildWireguardConfig : undefined,
   buildLookupResult:
     typeof buildLookupResult === "function" ? buildLookupResult : undefined,
+  cleanupMacWireguardState:
+    typeof cleanupMacWireguardState === "function" ? cleanupMacWireguardState : undefined,
   getMacTailscalePath:
     typeof getMacTailscalePath === "function" ? getMacTailscalePath : undefined,
   isMacTailscaleActive:
@@ -108,6 +110,26 @@ test("buildMacTailscaleState records whether tailscale was active", () => {
   );
 });
 
+test("cleanupMacWireguardState removes stale config and last-connection files", () => {
+  const { cleanupMacWireguardState } = loadInternals();
+  assert.equal(typeof cleanupMacWireguardState, "function");
+
+  const tmpDir = fs.mkdtempSync(path.join(fs.mkdtempSync("/tmp/nordvpn-client-test-"), "state-"));
+  const configPath = path.join(tmpDir, "nordvpnctl.conf");
+  const lastConnectionPath = path.join(tmpDir, "last-connection.json");
+  fs.writeFileSync(configPath, "wireguard-config");
+  fs.writeFileSync(lastConnectionPath, "{\"country\":\"Germany\"}");
+
+  const result = cleanupMacWireguardState({
+    configPath,
+    lastConnectionPath,
+  });
+
+  assert.equal(result.cleaned, true);
+  assert.equal(fs.existsSync(configPath), false);
+  assert.equal(fs.existsSync(lastConnectionPath), false);
+});
+
 test("isMacTailscaleActive treats Running backend as active", () => {
   const { isMacTailscaleActive } = loadInternals();
   assert.equal(typeof isMacTailscaleActive, "function");