CUB-200: resolve merge conflicts with dev — adopt dev's consolidated workflows and improved Go gateway code

.env.example

@@ -12,16 +12,15 @@ ENVIRONMENT=development
 # Format: postgresql://user:password@host:port/database?sslmode=disable
 DATABASE_URL=postgresql://controlcenter:controlcenter@localhost:5432/controlcenter?sslmode=disable
 
-# Gateway (OpenClaw) connection — WebSocket (primary)
-# WebSocket URL for real-time OpenClaw gateway v3 protocol
-GATEWAY_WS_URL=ws://localhost:18789/
-# Auth token for the OpenClaw gateway (operator scope)
-OPENCLAW_GATEWAY_TOKEN=
+# Gateway (OpenClaw) connection
+# WebSocket gateway config (primary path)
+WS_GATEWAY_URL=ws://host.docker.internal:18789/
+# Gateway auth token — same as OPENCLAW_GATEWAY_TOKEN (set in environment)
+GATEWAY_TOKEN=
 
-# Gateway (OpenClaw) connection — REST (fallback)
-# URL to the OpenClaw gateway API for polling agent states (used only if WS fails)
-GATEWAY_URL=http://localhost:18789/api/agents
-# Polling interval for agent state updates
+# REST poller config (fallback, only used if WS fails to connect)
+GATEWAY_URL=http://host.docker.internal:18789/api/agents
+# Polling interval for agent state updates (fallback only)
 GATEWAY_POLL_INTERVAL=5s
 
 # ── Frontend Variables (via Vite) ───────────────────────────────────────
@@ -33,7 +32,7 @@ GATEWAY_POLL_INTERVAL=5s
 # When using docker-compose, these are set in the services section
 # See docker-compose.yml for service-specific environment variables
 
-# ── Database Configuration ─────────────────────────────────────────────
+# ── Database Configuration ───────────────────────────────────────────────
 # Set in the db service environment section of docker-compose.yml
 # POSTGRES_USER=controlcenter
 # POSTGRES_PASSWORD=controlcenter
@@ -48,4 +47,4 @@ GATEWAY_POLL_INTERVAL=5s
 # For Docker deployment:
 # 1. Copy .env.example to .env (backend only)
 # 2. Run: docker compose up -d
-# 3. Access frontend at http://localhost:3000
+# 3. Access frontend at http://localhost:3000