PDF underlays: attach dialog with pages, underlay tab, layers, import settings and file import, unload on the definition

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/command.rs

@@ -1556,6 +1556,17 @@ pub enum CmdResult {
     BatchCopy(Vec<Handle>, Vec<EntityTransform>),
     /// Erase `handle` and replace with new entities; command stays active.
     ReplaceEntity(Handle, Vec<EntityType>),
+    /// Attach PDF pages: each page's underlay with its file (as stored) and
+    /// page; the host creates or reuses the definitions and commits them all
+    /// in one undo step, then ends the command.
+    /// Open the PDF Import Settings dialog; the command keeps its prompt.
+    OpenPdfImportSettings,
+    /// Import a page of a file (PDFIMPORT File); ends the command.
+    PdfImportFile(crate::modules::insert::pdf_import::PdfFileImport),
+    AttachPdfPages {
+        path: String,
+        pages: Vec<(String, EntityType)>,
+    },
     /// Import the vector content of a PDF underlay (PDFIMPORT); ends the command.
     PdfImport(crate::modules::insert::pdf_import::PdfImportRequest),
     /// Update one entity in place, preserve its handle, and end the command.
@@ -2846,12 +2857,6 @@ pub trait CadCommand: Send {
         None
     }
 
-    /// If this command attaches a PDF page: its file and page. The host
-    /// creates (or reuses) the definition with the committed underlay.
-    fn pdf_attach_source(&self) -> Option<(String, String)> {
-        None
-    }
-
     /// The block reference an ATTEDIT pick has resolved to, awaiting the
     /// attribute editor dialog; else None.
     fn attedit_pending_handle(&self) -> Option<acadrust::Handle> {