Establish OA/SA prototype baseline and first-release work

crates/oa-desktop/src/main.rs

@@ -0,0 +1,38 @@
+#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
+mod app;
+mod behavior;
+mod diagram;
+mod forms;
+mod guide;
+mod highlight;
+mod navigation;
+mod source_navigation;
+mod style;
+#[cfg(test)]
+mod tests;
+mod views;
+mod workflow;
+
+fn main() -> iced::Result {
+    // Small headless entry points support reproducible examples and CI validation.
+    let args: Vec<_> = std::env::args().collect();
+    if args.get(1).is_some_and(|s| s == "--write-example") {
+        let path = args
+            .get(2)
+            .expect("usage: arcadia-studio --write-example PATH");
+        oa_core::persistence::save(std::path::Path::new(path), &oa_core::Project::demo())
+            .expect("write example");
+        return Ok(());
+    }
+    iced::application(app::App::new, app::App::update, app::App::view)
+        .title(app::App::title)
+        .theme(|_: &app::App| style::theme())
+        .subscription(app::App::subscription)
+        .window(iced::window::Settings {
+            size: iced::Size::new(1440., 900.),
+            min_size: Some(iced::Size::new(1100., 700.)),
+            exit_on_close_request: false,
+            ..Default::default()
+        })
+        .run()
+}