TRIM / EXTEND: Standard mode and TRIMEXTENDMODE (#1733)

Both commands gain a mOde option [Quick/Standard]. Quick (the default)
starts ready to pick, every object a cutting or boundary edge; Standard
starts by selecting those edges, Enter with none taking every object.
The choice is TRIMEXTENDMODE (1 Quick, 0 Standard), kept in the profile
and settable with SETVAR.

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

src/app/update/file.rs

@@ -810,6 +810,7 @@ impl OpenCADStudio {
             field_display: crate::entities::field::display(),
             xref_fade: crate::scene::cache::block_cache::xref_fade_ctl(),
             file_dia: crate::sys::file_dia(),
+            trim_extend_quick: crate::modules::draw::modify::trim::quick_mode(),
             attach_filter: crate::sys::attach_filter(),
             surface_associativity: crate::scene::model::sweep_model::surface_associativity(),
             ucs_ortho: crate::modules::view::view_cmd::ucs_ortho(),
@@ -946,6 +947,7 @@ impl OpenCADStudio {
         crate::scene::cache::block_cache::set_xref_fade_ctl(s.xref_fade);
         self.ribbon.xref_fade = crate::scene::cache::block_cache::xref_fade_ctl();
         crate::sys::set_file_dia(s.file_dia);
+        crate::modules::draw::modify::trim::set_quick_mode(s.trim_extend_quick);
         crate::sys::set_attach_filter(s.attach_filter);
         crate::scene::model::sweep_model::set_surface_associativity(s.surface_associativity);
         crate::modules::view::view_cmd::set_ucs_ortho(s.ucs_ortho);