参考所有分组，完成尽量多的内容。禁止顺手扩功能 smoke

结论：补强 WASM runtime shim 的 LinuxCNC HAL source-map 与 probe，确认 HAL lookup 在浏览器安全 shim 中保持不可用边界，不扩展 smoke 行为。

core/wasm_shims/cnc_sim_wasm_runtime_probe_main.cc

@@ -1,4 +1,5 @@
 #include "cnc_sim_api.h"
+#include "hal.h"
 
 #include <cmath>
 #include <cstdlib>
@@ -9,6 +10,8 @@
 
 // LinuxCNC source basis: src/emc/rs274ngc/rs274ngc_pre.cc provides read(),
 // execute(), and wordexp() paths; interp_convert.cc converts G0, G2, and M30.
+// src/emc/rs274ngc/interp_namedparams.cc calls the HAL lookup functions
+// declared in include/hal.h and implemented by src/hal/hal_lib.c.
 namespace {
 
 int collect_event(const CncSimEvent *event, void *user_data) {
@@ -57,6 +60,46 @@ bool wordexp_expands_environment_variables() {
     return ok;
 }
 
+bool hal_lookup_is_unavailable() {
+    if (hal_init("cnc_sim_wasm_runtime_probe") != 1) {
+        return false;
+    }
+    if (hal_ready(1) != 0) {
+        return false;
+    }
+
+    hal_data_u dummy{};
+    hal_data_u *data = &dummy;
+    hal_type_t type = HAL_FLOAT;
+    bool connected = true;
+    if (hal_get_pin_value_by_name("cnc-sim.missing-pin", &type, &data, &connected) != -1 ||
+        type != HAL_TYPE_UNINITIALIZED ||
+        data != nullptr ||
+        connected) {
+        return false;
+    }
+
+    data = &dummy;
+    type = HAL_FLOAT;
+    bool has_writers = true;
+    if (hal_get_signal_value_by_name("cnc-sim.missing-signal", &type, &data, &has_writers) != -1 ||
+        type != HAL_TYPE_UNINITIALIZED ||
+        data != nullptr ||
+        has_writers) {
+        return false;
+    }
+
+    data = &dummy;
+    type = HAL_FLOAT;
+    if (hal_get_param_value_by_name("cnc-sim.missing-param", &type, &data) != -1 ||
+        type != HAL_TYPE_UNINITIALIZED ||
+        data != nullptr) {
+        return false;
+    }
+
+    return true;
+}
+
 } // namespace
 
 int main() {
@@ -66,6 +109,9 @@ int main() {
     if (!wordexp_expands_environment_variables()) {
         return 6;
     }
+    if (!hal_lookup_is_unavailable()) {
+        return 7;
+    }
 
     std::vector<CncSimEvent> events;
     CncSimHandle *sim = cnc_sim_create();