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/server-test-plugin/index.mjs

@@ -0,0 +1,39 @@
+// Singleton guard — openclaw calls register() twice per process
+let _registered = false;
+
+export default function register(_api) {
+  if (_registered) return;
+  _registered = true;
+
+  const server = globalThis.__yonexusServer;
+  if (!server) {
+    console.error('[server-test] __yonexusServer not on globalThis — ensure Yonexus.Server loads first');
+    return;
+  }
+
+  console.log('[server-test] __yonexusServer available, keys:', Object.keys(server));
+
+  // Register test_ping rule
+  // Received format (rewritten by server): test_ping::<senderIdentifier>::<content>
+  server.ruleRegistry.registerRule('test_ping', (raw) => {
+    const firstSep = raw.indexOf('::');
+    const rest = raw.slice(firstSep + 2);
+    const secondSep = rest.indexOf('::');
+    const sender = rest.slice(0, secondSep);
+    const content = rest.slice(secondSep + 2);
+    console.log(`[server-test] MATCH  test_ping  from="${sender}"  content="${content}"`);
+    // Echo back to sender via test_pong
+    const sent = server.sendRule(sender, 'test_pong', `echo-${content}`);
+    console.log(`[server-test] echo sent=${sent}`);
+  });
+
+  // When a client authenticates, send one matching and one non-matching rule message
+  server.onClientAuthenticated.push((identifier) => {
+    console.log(`[server-test] Client "${identifier}" authenticated — sending test_pong + other_rule`);
+    const s1 = server.sendRule(identifier, 'test_pong', 'welcome-from-server');
+    const s2 = server.sendRule(identifier, 'other_rule', 'other-from-server');
+    console.log(`[server-test] sendRule results: test_pong=${s1} other_rule=${s2}`);
+  });
+
+  console.log('[server-test] registered test_ping rule and onClientAuthenticated callback');
+}

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

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