fix: clear imageObject default and use correct Parameters version marker

Two fixes for CE0463 on Image widgets with modified properties:

1. Clear imageObject.Image in the template — the extraction captured a
   non-default value ("Atlas_Web_Content.Content.user") from the source
   widget. Widgets created from this template inherited an image binding
   that didn't match their actual configuration.

2. Use Parameters version marker [2] (not [3]) when opTextTemplate
   creates a new TextTemplate from scratch. Studio Pro expects [2] for
   empty parameter arrays in ClientTemplate objects.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ako

mdl/executor/widget_engine.go

@@ -236,7 +236,7 @@ func setTextTemplateValue(val bson.D, text string) bson.D {
 						{Key: "$Type", Value: "Texts$Text"},
 						{Key: "Items", Value: bson.A{int32(3)}},
 					}},
-					{Key: "Parameters", Value: bson.A{int32(3)}},
+					{Key: "Parameters", Value: bson.A{int32(2)}},
 					{Key: "Template", Value: bson.D{
 						{Key: "$ID", Value: mpr.IDToBsonBinary(mpr.GenerateID())},
 						{Key: "$Type", Value: "Texts$Text"},

sdk/widgets/templates/mendix-11.6/image.json

@@ -60,7 +60,7 @@
           "Expression": "",
           "Form": "",
           "Icon": null,
-          "Image": "Atlas_Web_Content.Content.user",
+          "Image": "",
           "Microflow": "",
           "Nanoflow": "",
           "Objects": [
@@ -1337,7 +1337,7 @@
         {
           "$ID": "6f547135d200034bb5d167f9958536a7",
           "$Type": "CustomWidgets$WidgetPropertyType",
-          "Caption": "\u003csystem:Name\u003e",
+          "Caption": "<system:Name>",
           "Category": "General::Conditional Visibility",
           "Description": "",
           "IsDefault": false,
@@ -1388,7 +1388,7 @@
         {
           "$ID": "7c043cb9ab7b7f4da53e330b429963f0",
           "$Type": "CustomWidgets$WidgetPropertyType",
-          "Caption": "\u003csystem:Visibility\u003e",
+          "Caption": "<system:Visibility>",
           "Category": "General::Conditional Visibility",
           "Description": "",
           "IsDefault": false,
@@ -2102,8 +2102,8 @@
       ]
     },
     "OfflineCapable": true,
-    "StudioCategory": "Images, Videos \u0026 Files",
-    "StudioProCategory": "Images, videos \u0026 files",
+    "StudioCategory": "Images, Videos & Files",
+    "StudioProCategory": "Images, videos & files",
     "SupportedPlatform": "Web",
     "WidgetDescription": "Display an image and enlarge it on click.",
     "WidgetId": "com.mendix.widget.web.image.Image",
@@ -2113,4 +2113,4 @@
   },
   "version": "11.8.0",
   "widgetId": "com.mendix.widget.web.image.Image"
-}
+}