UI: a setup checklist at the top of the browser

Once a model has geometry or a mesh, the browser shows the analysis stages from the engine's
checklist, each ticked, next, dashed (optional) or open; a click starts the stage's command and a
blocked stage's hover says what it waits for. The × hides it and View › Setup checklist shows it
again; the choice is kept in the per-user prefs.json.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo

apps/fieldcraft-web/src/web.rs

@@ -188,6 +188,7 @@ fn services(inbox: Inbox, ctx: egui::Context) -> Services {
         pick_save: Some(Box::new(|name: &str, _: &[Filter]| Some(page_path(name)))),
         // The recent list holds the page's files, which go with the page.
         recent_path: None,
+        prefs_path: None,
     }
 }
 

apps/fieldcraft/src/main.rs

@@ -95,6 +95,7 @@ fn services() -> Services {
         })),
         // Beside the recovery folder in the per-user data folder.
         recent_path: fieldcraft_io::recovery::default_dir().and_then(|d| d.parent().map(|p| p.join("recent.json"))),
+        prefs_path: fieldcraft_io::recovery::default_dir().and_then(|d| d.parent().map(|p| p.join("prefs.json"))),
     }
 }