L4-TOOL-DB接入数控系统仿真证据

结论：L4-TOOL-DB 已接入浏览器/WASM/OPFS 仿真证明链，并纳入 release/host gate；axis/db_demo/base.ngc 仍保持 L4-TOOL-DB locked，promotion_allowed=0，sim-config baseline 保持 28/28/131/0。

wasm-port/runtime/workers/tool-db-python-worker.js

@@ -19,12 +19,42 @@ function getRuntimeProvider() {
   return self.linuxCncToolDbPythonRuntimeProvider ?? null;
 }
 
+async function loadRuntimeProvider(moduleUrl) {
+  if (!moduleUrl) {
+    return {
+      status: "blocked_browser_python_wasm_runtime_missing",
+      provider: getRuntimeProvider(),
+    };
+  }
+  try {
+    await import(moduleUrl);
+  } catch (error) {
+    return {
+      status: "blocked_browser_python_wasm_runtime_load_failed",
+      error,
+      provider: getRuntimeProvider(),
+    };
+  }
+  const provider = getRuntimeProvider();
+  if (!provider) {
+    return {
+      status: "blocked_browser_python_wasm_provider_missing",
+      provider,
+    };
+  }
+  return {
+    status: "browser_python_wasm_runtime_ready",
+    provider,
+  };
+}
+
 self.addEventListener("message", async (event) => {
   const message = event.data ?? {};
   const { id, type, line } = message;
   try {
     if (type === "start") {
-      const provider = getRuntimeProvider();
+      const runtimeLoad = await loadRuntimeProvider(message.pythonRuntimeModuleUrl);
+      const provider = runtimeLoad.provider;
       const providerReady = Boolean(provider?.start && provider?.writeLine && provider?.readLine);
       const ready = providerReady || pythonRuntimeAvailable();
       if (providerReady) {
@@ -33,9 +63,8 @@ self.addEventListener("message", async (event) => {
       postReply(id, type, {
         runtimeMode: "browser-python-wasm-worker",
         runtimeExecutionReady: ready,
-        status: ready
-          ? "browser_python_wasm_runtime_ready"
-          : "blocked_browser_python_wasm_runtime_missing",
+        status: ready ? "browser_python_wasm_runtime_ready" : runtimeLoad.status,
+        error: runtimeLoad.error?.message ?? null,
         executionEnabled: false,
         promotionAllowed: false,
       });