Block Definition command-line forms, block record data and dialog defaults

-BLOCK, -WBLOCK, -BEDIT, ATTSYNC, BASE and INSBASE follow the reference
prompts and messages; empty blocks; WBLOCK keeps object coordinates and
stores INSBASE; annotative and hyperlink data on the block record; block
preview images; remembered dialog choices; block aliases.

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

src/app/update/blocks_palette.rs

@@ -629,14 +629,7 @@ impl OpenCADStudio {
         self.block_palette.source_tab_id = Some(self.tabs[i].id);
         self.block_palette.source_block_epoch = self.tabs[i].scene.block_epoch;
         let doc = &self.tabs[i].scene.document;
-        let annotative = |name: &str| {
-            doc.block_records.get(name).is_some_and(|br| {
-                matches!(
-                    doc.get_entity(br.block_entity_handle),
-                    Some(codec::EntityType::Block(b)) if b.common.extended_data.records().iter().any(|r| r.application_name == "AcadAnnotative")
-                )
-            })
-        };
+        let annotative = |name: &str| crate::scene::annotative::block_is_annotative(doc, name);
         let entries: Vec<BlockEntry> = names
             .into_iter()
             .map(|name| BlockEntry {