Remove the SETUP card: the browser tree shows the progress

The setup checklist card (#265), its show_setup view setting, the View
menu checkbox and the preferences file that only remembered it go; the
tree's marks and ghost rows replace them. Session::progress and
model.check's progress stay for agents. An old prefs.json is no longer
read.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo

crates/ui-egui/src/lib.rs

@@ -42,7 +42,6 @@ pub mod results;
 pub mod results_panel;
 pub mod scene;
 pub mod selection;
-pub mod setup;
 pub mod theme;
 pub mod timeline;
 pub mod titlebar;
@@ -88,8 +87,6 @@ pub struct UiState {
     pub show_tree: bool,
     /// The journal timeline (bottom).
     pub show_timeline: bool,
-    /// The setup checklist at the top of the browser (remembered per user).
-    pub show_setup: bool,
     /// The workspace shown, and its toolbar tab.
     pub workspace: Workspace,
     pub tab: Tab,
@@ -113,7 +110,6 @@ impl Default for UiState {
             dark: true,
             show_tree: true,
             show_timeline: true,
-            show_setup: true,
             workspace: Workspace::default(),
             tab: Tab::default(),
             palette: false,
@@ -356,8 +352,7 @@ pub struct ModelApp {
     /// Recently opened and saved files.
     pub recent: files::Recent,
     /// The user's preferences as last saved.
-    prefs: files::Prefs,
-    /// The setup checklist and what it was worked out for.
+    /// The setup progress the browser marks, and what it was worked out for.
     setup: (Option<(u64, u64, bool, bool)>, std::sync::Arc<Vec<fieldcraft_engine::progress::StageState>>),
     /// The file opening in the background, and files waiting to open after it.
     pub loading: Option<files::Loading>,
@@ -436,7 +431,6 @@ impl ModelApp {
             quit_requested: false,
             services: files::Services::default(),
             recent: files::Recent::default(),
-            prefs: files::Prefs::default(),
             setup: (None, std::sync::Arc::default()),
             loading: None,
             queued: std::collections::VecDeque::new(),
@@ -469,8 +463,6 @@ impl ModelApp {
     /// Use the host's services (file pickers, the recent-files file) and load the recent list.
     pub fn with_services(mut self, services: files::Services) -> Self {
         self.recent = files::Recent::load(services.recent_path.clone());
-        self.prefs = files::Prefs::load(services.prefs_path.as_deref());
-        self.ui.show_setup = self.prefs.show_setup;
         self.services = services;
         self
     }
@@ -1327,7 +1319,6 @@ impl ModelApp {
             browser::browser(self, ui);
         }
         context::panel(self, ui);
-        self.save_prefs();
         egui::CentralPanel::default().frame(egui::Frame::NONE).show(ui, |ui| viewport::show(self, ui));
         palette::popup(self, ui.ctx());
         files::show(self, ui.ctx());
@@ -1336,8 +1327,8 @@ impl ModelApp {
         }
     }
 
-    /// The setup checklist ([`fieldcraft_engine::progress`]), worked out again only when the model
-    /// or its results change.
+    /// The setup progress ([`fieldcraft_engine::progress`]) the browser marks, worked out again
+    /// only when the model or its results change.
     pub fn setup_stages(&mut self) -> std::sync::Arc<Vec<fieldcraft_engine::progress::StageState>> {
         use fieldcraft_engine::requirement::Requirement;
         let key = (self.revision, self.session.revision(), Requirement::Result.met(&self.session), Requirement::ResultsShown.met(&self.session));
@@ -1347,14 +1338,6 @@ impl ModelApp {
         self.setup.1.clone()
     }
 
-    /// Save the preferences the window changed (a View menu toggle, `ui.set`).
-    pub(crate) fn save_prefs(&mut self) {
-        if self.ui.show_setup != self.prefs.show_setup {
-            self.prefs.show_setup = self.ui.show_setup;
-            self.prefs.save(self.services.prefs_path.as_deref());
-        }
-    }
-
     /// Remember where a region of the window was drawn (`ui.inspect`'s `layout`).
     pub fn place(&mut self, region: &'static str, rect: egui::Rect) {
         self.layout.insert(region, rect);