chore: clean up repo structure

- Add node_modules/, test-results/, e2e-report/, .omp/ to .gitignore
- Remove throwaway debug scripts (debug-pw*.js, debug-login-dom.js)
- Remove empty mock-server/ directory
- Untrack harness artifact (.omp/plans/)
- Add missing project files to git (e2e tests, Dockerfiles, tooling configs)

docker-compose.yml

@@ -1,4 +1,37 @@
 services:
+  # OpenWRT LuCI container — web UI for Playwright E2E tests
+  # Uses the pre-imported zt-gateway-luci:dev image (OpenWrt 25.12.4 rootfs
+  # with LuCI + zt-gateway application overlay). No docker build needed.
+  openwrt-luci:
+    image: zt-gateway-luci:dev
+    container_name: openwrt-luci
+    privileged: true
+    cap_add:
+      - NET_ADMIN
+      - SYS_ADMIN
+    ports:
+      - "8080:80"
+    networks:
+      zt-exit-net:
+        ipv4_address: "10.99.12.2"
+    environment:
+      ZTG_SKIP_PERSIST: "1"
+      ZTG_PING_IFACE: "br-zt"
+      ZTG_WIBLAN_CIDR: "10.99.13.0/24"
+    entrypoint: ["/entrypoint.sh"]
+    volumes:
+      # Overlay fixed application files (rpcd backend, LuCI view, config, menu, acl)
+      - ./root/usr/share/rpcd/ucode/zt-gateway.uc:/usr/share/rpcd/ucode/zt-gateway.uc:ro
+      - ./root/usr/share/rpcd/ucode/system.uc:/usr/share/rpcd/ucode/system.uc:ro
+      - ./root/usr/share/ucode/luci/runtime.uc:/usr/share/ucode/luci/runtime.uc:ro
+      - ./root/usr/share/luci/menu.d/luci-app-zt-gateway.json:/usr/share/luci/menu.d/luci-app-zt-gateway.json:ro
+      - ./root/usr/share/rpcd/acl.d/luci-app-zt-gateway.json:/usr/share/rpcd/acl.d/luci-app-zt-gateway.json:ro
+      # Stage host config so the entrypoint can copy it into the writable overlay.
+      - ./root/etc/config:/host-config:ro
+      - ./htdocs/luci-static/resources/view/zt-gateway/overview.js:/www/luci-static/resources/view/zt-gateway/overview.js:ro
+      - ./docker/openwrt-luci-entrypoint.sh:/entrypoint.sh:ro
+
+  # Arch-based router — CLI routing tests
   openwrt-router:
     build:
       context: .