fix(paste): pasted entities land in the current space

The paste kernel added every entity to model space. It now takes the
space a new entity goes to: the block being edited, a layout's paper
space when no viewport is active, or model space.

Fixes #1652

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/modules/insert/wblock.rs

@@ -114,7 +114,13 @@ fn copy_with_dependencies(
         })
         .collect();
     let (entities, deps) = crate::app::copy_to_clipboard_kernel(src, &handles);
-    crate::app::paste_entities_kernel(out, &entities, &deps, translate, None);
+    crate::app::paste_entities_kernel(
+        out,
+        &entities,
+        &deps,
+        translate,
+        crate::app::PasteSpace::Model,
+    );
 }
 
 /// Translate every entity of `out` so the overall bounds minimum lands on