fix(ws-client): reject envelopes from unsupported protocol versions

isWsEnvelope accepted any numeric v, so a hypothetical v2 frame would be
dispatched (or resolve a pending ack) under v1 semantics while the server
parser pins v to 1 — pin the client predicate to the same literal.

Author: Innei

packages/ws-client/src/protocol.ts

@@ -21,7 +21,7 @@ export function isWsEnvelope(value: unknown): value is WsEnvelope {
 
   const candidate = value as Record<string, unknown>
 
-  if (typeof candidate.v !== 'number') return false
+  if (candidate.v !== WS_PROTOCOL_VERSION) return false
   if (typeof candidate.event !== 'string' || candidate.event.length === 0) {
     return false
   }

packages/ws-client/test/protocol.spec.ts

@@ -67,6 +67,11 @@ describe('isWsEnvelope', () => {
     expect(isWsEnvelope({ v: '1', event: 'ping' })).toBe(false)
   })
 
+  it('rejects an unsupported protocol version', () => {
+    expect(isWsEnvelope({ v: 2, event: 'ping' })).toBe(false)
+    expect(isWsEnvelope({ v: 0, event: 'ping' })).toBe(false)
+  })
+
   it('rejects a missing or empty event', () => {
     expect(isWsEnvelope({ v: 1 })).toBe(false)
     expect(isWsEnvelope({ v: 1, event: '' })).toBe(false)