feat: add rule dispatch, cross-plugin API, and Docker integration test

Wire rule registry and authenticated callbacks into both client and server
runtimes; expose __yonexusClient / __yonexusServer on globalThis for
cross-plugin communication. Add Docker-based integration test with
server-test-plugin (test_ping echo) and client-test-plugin (test_pong
receiver), plus docker-compose setup. Fix transport race condition where
a stale _connections entry caused promoteToAuthenticated to silently fail.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/docker/client-test-plugin/index.mjs

@@ -0,0 +1,33 @@
+// Singleton guard — openclaw calls register() twice per process
+let _registered = false;
+
+export default function register(_api) {
+  if (_registered) return;
+  _registered = true;
+
+  const client = globalThis.__yonexusClient;
+  if (!client) {
+    console.error('[client-test] __yonexusClient not on globalThis — ensure Yonexus.Client loads first');
+    return;
+  }
+
+  console.log('[client-test] __yonexusClient available, keys:', Object.keys(client));
+
+  // Register test_pong rule
+  // Received format (plain rule message from server): test_pong::<content>
+  client.ruleRegistry.registerRule('test_pong', (raw) => {
+    const sep = raw.indexOf('::');
+    const content = raw.slice(sep + 2);
+    console.log(`[client-test] MATCH  test_pong  content="${content}"`);
+  });
+
+  // When authenticated, send one matching and one non-matching rule message to server
+  client.onAuthenticated.push(() => {
+    console.log('[client-test] Authenticated — sending test_ping + other_rule to server');
+    const s1 = client.sendRule('test_ping', 'hello-from-client');
+    const s2 = client.sendRule('other_rule', 'other-from-client');
+    console.log(`[client-test] sendRule results: test_ping=${s1} other_rule=${s2}`);
+  });
+
+  console.log('[client-test] registered test_pong rule and onAuthenticated callback');
+}

tests/docker/client-test-plugin/openclaw.plugin.json

@@ -0,0 +1,13 @@
+{
+  "id": "yonexus-client-test",
+  "name": "Yonexus Client Test Plugin",
+  "version": "0.1.0",
+  "description": "Test plugin for Yonexus.Client rule routing",
+  "entry": "./index.mjs",
+  "permissions": [],
+  "configSchema": {
+    "type": "object",
+    "additionalProperties": false,
+    "properties": {}
+  }
+}