尽快推进：收紧浏览器后端边界

check-linuxcnc-browser-app-source-map.sh

@@ -121,4 +121,10 @@ for entry in [
 app = Path("web/src/app.js").read_text(encoding="utf-8")
 if "parse(" in app.replace("parseProgram", ""):
     raise SystemExit("browser app should route program execution through parseFileWithParameterFile, not direct parse")
+if app.count("elements.backendSelect.value = linuxCncBackend;") != 2:
+    raise SystemExit("browser app backend selector must only be forced to the LinuxCNC backend")
+if "backendSelect.value" in app.replace("elements.backendSelect.value = linuxCncBackend;", ""):
+    raise SystemExit("browser app must not read the backend selector as a dynamic backend source")
+if 'backend: linuxCncBackend' not in app:
+    raise SystemExit("browser app parse options must force the LinuxCNC backend")
 PY