Web source: render at canvas size 1920x1080 — full-bleed widgets no longer truncated to upper-left

Services/WebView2Manager.cs

@@ -45,16 +45,16 @@ public sealed class WebView2Manager : IDisposable
     {
         if (_sessions.ContainsKey(source.Id)) return;
 
-        // OBS model: the page renders ONCE at a stable viewport — the size the
-        // element was created at (snapshot, never tracked, so dragging the box
-        // never reflows/truncates the page and no scrollbars appear). The
-        // captured texture is then stretched by the display (Stretch=Fill) into
-        // whatever box the user draws, so the frame always bounds content with
-        // zero dead space. Geometry-agnostic: any widget, any box.
+        // OBS model: the page renders at the MASTER CANVAS size (1920×1080),
+        // stable, never tracked. Full-bleed widgets (designed for the canvas)
+        // render fully instead of being clipped to a small box-sized viewport;
+        // dragging the box never reflows the page. The capture is cropped to
+        // the widget's actual content bounds (QueryContentBoundsAsync) and the
+        // display (Stretch=Fill) maps it flush under the box, anchored at (0,0).
         var webView = new WebView2
         {
-            Width = Math.Max(1, source.Width),
-            Height = Math.Max(1, source.Height),
+            Width = 1920,
+            Height = 1080,
             DefaultBackgroundColor = System.Drawing.Color.Transparent,
             Visibility = System.Windows.Visibility.Visible,
         };