接续上一轮：推进浏览器验证与M428配置收拢

结论：已完成浏览器侧真实加载验证，M428/M429/M430 的配置入口进一步从 LinuxCNC INI/HALFILE/REMAP 来源生成，native 与 source-link 验证通过。

test-web-wasm-node-smoke.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+cd "$(dirname "$0")"
+
+missing=()
+for required in node web/public/cnc_sim.js web/public/cnc_sim.wasm; do
+    if [[ "$required" == node ]]; then
+        if ! command -v node >/dev/null 2>&1; then
+            missing+=("node")
+        fi
+    elif [[ ! -f "$required" ]]; then
+        missing+=("$required")
+    fi
+done
+
+if ((${#missing[@]} > 0)); then
+    echo "WASM Node smoke prerequisites are missing: ${missing[*]}." >&2
+    echo "Run ./build-wasm.sh after activating emsdk to generate web/public/cnc_sim.js and web/public/cnc_sim.wasm." >&2
+    exit 1
+fi
+
+node test-web-wasm-node-smoke.cjs