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/Dockerfile

@@ -0,0 +1,37 @@
+# Build context: repo root (Yonexus/)
+# ── Stage 1: compile ──────────────────────────────────────────────────────────
+FROM node:22-alpine AS builder
+
+WORKDIR /build
+
+# Client imports Yonexus.Protocol only
+COPY Yonexus.Protocol/src                    ./Yonexus.Protocol/src
+
+COPY Yonexus.Client/package.json             ./Yonexus.Client/
+COPY Yonexus.Client/package-lock.json        ./Yonexus.Client/
+COPY Yonexus.Client/tsconfig.json            ./Yonexus.Client/
+COPY Yonexus.Client/plugin                   ./Yonexus.Client/plugin
+
+WORKDIR /build/Yonexus.Client
+RUN npm ci
+RUN npm run build
+
+# ── Stage 2: runtime ─────────────────────────────────────────────────────────
+FROM node:22-alpine AS runtime
+
+RUN npm install -g openclaw@2026.4.9
+
+WORKDIR /app
+
+# Layout expected by install.mjs: repoRoot = /app, sourceDist = /app/dist
+COPY --from=builder /build/Yonexus.Client/dist         ./dist
+COPY --from=builder /build/Yonexus.Client/node_modules ./node_modules
+COPY Yonexus.Client/package.json               ./package.json
+COPY Yonexus.Client/plugin/openclaw.plugin.json ./plugin/openclaw.plugin.json
+COPY Yonexus.Client/scripts/install.mjs        ./scripts/install.mjs
+
+COPY tests/docker/client-test-plugin /app/client-test-plugin
+COPY tests/docker/client/entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]