fix(web): use toast for error notifications instead of window.alert

Replace blocking window.alert calls with a notifyError helper that
mirrors notifySuccess, giving consistent toast-based UX for both
success and failure paths on the Refresh Models and Test Connection
buttons.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

connect_node.py

@@ -31,7 +31,7 @@ class LMStudioConnect(io.ComfyNode):
                     id="server_url",
                     display_name="Server URL",
                     default="http://127.0.0.1:1234",
-                    placeholder="http://192.0.2.10:1234",
+                    placeholder="http://10.168.168.7:1234",
                     tooltip="LMStudio server URL (without /v1).",
                 ),
                 io.String.Input(

tests/test_client.py

@@ -6,7 +6,7 @@ import client
 
 
 def test_normalize_server_url_trims_and_strips_v1() -> None:
-    assert client.normalize_server_url(" http://192.0.2.10:1234/v1/ ") == "http://192.0.2.10:1234"
+    assert client.normalize_server_url(" http://10.168.168.7:1234/v1/ ") == "http://10.168.168.7:1234"
 
 
 @pytest.mark.parametrize(

web/lmstudio_connect.js

@@ -190,6 +190,19 @@ function notifySuccess(message) {
   }
 }
 
+function notifyError(message) {
+  if (typeof app.extensionManager?.toast?.add === "function") {
+    app.extensionManager.toast.add({
+      severity: "error",
+      summary: "LMStudio",
+      detail: message,
+      life: 5000,
+    });
+  } else {
+    console.error(`[LMStudio] ${message}`);
+  }
+}
+
 function fitNodeToWidgets(node) {
   if (typeof node.computeSize !== "function" || typeof node.setSize !== "function") {
     return;
@@ -292,7 +305,7 @@ function attachButtons(node) {
     } catch (error) {
       const message = error?.message || String(error);
       console.error("[LMStudio] Model refresh failed", error);
-      window.alert(`Model refresh failed: ${message}`);
+      notifyError(`Model refresh failed: ${message}`);
     }
   });
 
@@ -302,7 +315,7 @@ function attachButtons(node) {
     } catch (error) {
       const message = error?.message || String(error);
       console.error("[LMStudio] Connectivity test failed", error);
-      window.alert(`Connectivity test failed: ${message}`);
+      notifyError(`Connectivity test failed: ${message}`);
     }
   });