Block Attribute Manager window (BATTMAN / ATTMAN)

BATTMAN and ATTMAN open a manager for the attribute definitions of one
attributed block: block chips with reference counts and a pick button,
a table whose columns are chosen with chips, move up/down, remove, and
an edit card (Attribute / Text / Properties) for the selected row. Apply,
OK and Sync write the list back to the block definition and, when asked,
rebuild the existing references keeping values through tag renames;
each is one undo step. Live changes are taken back on Cancel. Automation
gains attman_dialog.

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

src/app/view/modal.rs

@@ -52,6 +52,7 @@ impl OpenCADStudio {
             Some(K::GeometricTolerance) => crate::t!("Geometric Tolerance").into_owned(),
             Some(K::AttDef) => crate::t!("Attribute Definition").into_owned(),
             Some(K::AttDefEdit) => crate::t!("Edit Attribute Definition").into_owned(),
+            Some(K::AttMan) => crate::t!("Block Attribute Manager").into_owned(),
             Some(K::CountInvalidArea) => crate::t!("Count - Invalid Area").into_owned(),
             Some(K::Field) => crate::t!("Field").into_owned(),
             Some(K::DraftingSettings) => crate::t!("Drafting Settings").into_owned(),
@@ -629,6 +630,12 @@ impl OpenCADStudio {
             super::super::ModalKind::CountInvalidArea => sized_flow(ex, 520, 260, |flow| {
                 crate::ui::window::count_palette::invalid_area_view(&self.count_palette, flow)
             }),
+            super::super::ModalKind::AttMan => {
+                let state = self.attman.as_ref()?;
+                sized_flow(ex, 880, 660, |flow| {
+                    crate::ui::window::attman_dialog::view(state, flow)
+                })
+            }
             super::super::ModalKind::AttDefEdit => {
                 let state = self.attdef_edit.as_ref()?;
                 sized_flow(ex, 460, 220, |flow| {