fix(adminui,cli): /raw device-name placeholder + no-prerender tree, CLI read prints Bad status (#577)

Claude-Session: https://claude.ai/code/session_01Ef2ozxS7QPanGT8uoATbTe

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Shared/Drivers/DeviceModal.razor

@@ -28,7 +28,7 @@
                         <div class="row g-3 mb-2">
                             <div class="col-md-6">
                                 <label class="form-label">Device name</label>
-                                <input class="form-control form-control-sm mono" @bind="_name" placeholder="Device1" />
+                                <input class="form-control form-control-sm mono" @bind="_name" placeholder="e.g. plc1" />
                                 <div class="form-text">A RawPath segment — letters, digits, dash, underscore.</div>
                             </div>
                             <div class="col-md-3">
@@ -145,7 +145,7 @@
         {
             _resolvedDriverInstanceId = DriverInstanceId;
             _driverType = DriverType ?? "";
-            _name = "Device1";
+            _name = ""; // placeholder only: a pre-filled value made typing append to it (#577); the name is validated on save
             _enabled = true;
             _deviceConfigJson = "{}";
             _rowVersion = [];