refactor: group ui/ style+popup dirs, rename cmd_result driver

- Group the flat src/ui/ dir: move the 9 style editors into ui/style/
  (dimstyle, mleaderstyle, mlstyle, plotstyle, textstyle, tablestyle,
  point_style, style_list, style_manager) and the 6 popups into
  ui/popup/ (cycle, isolate, scale, selection_filter, snap, units).
  Call sites repointed to crate::ui::style::/crate::ui::popup::; no
  compat re-exports. ui/ root drops from 36 to 21 files.
- Rename app/cmd_result.rs -> app/command_driver.rs: the file is the
  StepInput->feed_command driver, not the CmdResult type (which lives
  in command.rs). Name now matches contents.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

src/ui/mod.rs

@@ -6,37 +6,24 @@ pub mod about;
 pub mod app_menu;
 pub mod color_select;
 pub mod command_line;
-pub mod cycle_popup;
-pub mod dimstyle;
 pub mod icons;
-pub mod isolate_popup;
 pub mod layers;
 pub mod layout_manager;
-pub mod mleaderstyle;
-pub mod mlstyle;
 pub mod modal;
 pub mod open_progress;
 pub mod overlay;
 pub mod page_setup;
-pub mod plotstyle;
 pub mod plugin_manager;
-pub mod point_style;
+pub mod popup;
 pub mod properties;
 pub mod ribbon;
-pub mod scale_popup;
-pub mod selection_filter_popup;
 pub mod side_toolbar;
 pub mod shortcuts;
-pub mod snap_popup;
 pub mod statusbar;
 pub mod statusbar_config;
 pub mod statusbar_menu;
-pub mod style_list;
-pub mod style_manager;
-pub mod tablestyle;
+pub mod style;
 pub mod text_util;
-pub mod textstyle;
-pub mod units_popup;
 pub mod update_notice;
 
 pub use app_menu::AppMenu;

src/ui/popup/mod.rs

@@ -0,0 +1,6 @@
+pub mod cycle_popup;
+pub mod isolate_popup;
+pub mod scale_popup;
+pub mod selection_filter_popup;
+pub mod snap_popup;
+pub mod units_popup;

src/ui/statusbar.rs

@@ -167,7 +167,7 @@ impl StatusBar {
         if vis(StatusPill::Units) {
             right_status = right_status.push(tip(
                 units_btn(
-                    crate::ui::units_popup::unit_short(insertion_units),
+                    crate::ui::popup::units_popup::unit_short(insertion_units),
                     units_popup_open,
                 ),
                 "Drawing Units (INSUNITS)\nClick to change",

src/ui/style/dimstyle.rs

@@ -792,7 +792,7 @@ pub fn view_window<'a>(
         left: 0.0,
     });
 
-    crate::ui::style_manager::view(crate::ui::style_manager::Scaffold {
+    crate::ui::style::style_manager::view(crate::ui::style::style_manager::Scaffold {
         kind: crate::app::StyleKind::Dim,
         styles: &styles,
         selected,

src/ui/style/mleaderstyle.rs

@@ -413,7 +413,7 @@ pub fn view_window<'a>(v: MLeaderStyleView<'a>) -> Element<'a, Message> {
 
     let right_panel = container(details).width(Fill).height(Fill);
 
-    crate::ui::style_manager::view(crate::ui::style_manager::Scaffold {
+    crate::ui::style::style_manager::view(crate::ui::style::style_manager::Scaffold {
         kind: crate::app::StyleKind::MLeader,
         styles: &v.styles,
         selected: v.selected,

src/ui/style/mlstyle.rs

@@ -79,7 +79,7 @@ pub fn view_window<'a>(
 
     let right_panel = container(details).width(Fill).height(Fill);
 
-    crate::ui::style_manager::view(crate::ui::style_manager::Scaffold {
+    crate::ui::style::style_manager::view(crate::ui::style::style_manager::Scaffold {
         kind: crate::app::StyleKind::MLine,
         styles: &styles,
         selected,

src/ui/style/mod.rs

@@ -0,0 +1,9 @@
+pub mod dimstyle;
+pub mod mleaderstyle;
+pub mod mlstyle;
+pub mod plotstyle;
+pub mod textstyle;
+pub mod tablestyle;
+pub mod point_style;
+pub mod style_list;
+pub mod style_manager;

src/ui/style/style_manager.rs

@@ -115,7 +115,7 @@ pub fn view<'a, 'b>(s: Scaffold<'a, 'b>) -> Element<'a, Message> {
         .map(|name| {
             let is_sel = name.as_str() == s.selected;
             let is_current = s.current == Some(name.as_str());
-            crate::ui::style_list::item(
+            crate::ui::style::style_list::item(
                 name,
                 is_current,
                 is_sel,

src/ui/style/tablestyle.rs

@@ -369,7 +369,7 @@ pub fn view_window<'a>(
 
     let right_panel = container(details).width(Fill).height(Fill);
 
-    crate::ui::style_manager::view(crate::ui::style_manager::Scaffold {
+    crate::ui::style::style_manager::view(crate::ui::style::style_manager::Scaffold {
         kind: crate::app::StyleKind::Table,
         styles: &styles,
         selected,

src/ui/style/textstyle.rs

@@ -306,7 +306,7 @@ pub fn view_window<'a>(v: TextStyleView<'a>) -> Element<'a, Message> {
 
     let editor = row![font_panel, vsep(), ttf_panel, vsep(), props_panel].height(Fill);
 
-    crate::ui::style_manager::view(crate::ui::style_manager::Scaffold {
+    crate::ui::style::style_manager::view(crate::ui::style::style_manager::Scaffold {
         kind: StyleKind::Text,
         styles: &styles,
         selected,