Refactor VPN proxy client implementation

test/data-consistency-regression.test.js

@@ -1,8 +1,8 @@
 import assert from 'node:assert/strict';
 import test from 'node:test';
 
-import { parseSubscriptionBody } from '../src/server/subscription.js';
-import { createStateSnapshot, normalizeStoredState } from '../src/shared/contracts/state.js';
+import { parseSubscriptionBody } from '../dist/server/subscription.js';
+import { createStateSnapshot, normalizeStoredState } from '../dist/shared/contracts/state.js';
 
 const outbound = (index) => ({
   type: 'vless',
@@ -52,3 +52,14 @@ test('data invariant: one canonical snapshot owns server selection and never exp
   assert.equal(snapshot.servers.find((server) => server.id === selectedServerId)?.host, 'vpn-17.example.test');
   assert.equal(JSON.stringify(snapshot).includes('private-token'), false);
 });
+
+test('persisted numeric IDs and legacy tags keep their previous string normalization', () => {
+  const stored = normalizeStoredState({
+    servers: [{ id: '42', label: '7', host: 'vpn.example', port: 443, protocol: 'vless' }],
+    selectedServerId: 42,
+    appliedTag: 7,
+  });
+
+  assert.equal(stored.selectedServerId, '42');
+  assert.equal(stored.appliedServerId, '42');
+});