Rewrite Curator in Rust with an egui GUI

src/constants.rs

@@ -0,0 +1,24 @@
+//! Application-level constants (name, version, debug flag, window title).
+
+use std::env;
+
+pub const APP_NAME: &str = "Curator";
+
+/// The project version — `Cargo.toml` is the single source of truth.
+pub const APP_VERSION: &str = env!("CARGO_PKG_VERSION");
+
+/// Default main-window size when no geometry has been saved yet.
+pub const DEFAULT_WINDOW_SIZE: (f32, f32) = (1200.0, 800.0);
+
+/// True when `ENV_DEBUG` is set to a truthy value (`true` / `1` / `yes`).
+pub fn debug_mode() -> bool {
+    env::var("ENV_DEBUG")
+        .map(|v| matches!(v.to_lowercase().as_str(), "true" | "1" | "yes"))
+        .unwrap_or(false)
+}
+
+/// `Curator v1.2.3`, with a `-DEV` suffix in debug mode.
+pub fn app_title() -> String {
+    let suffix = if debug_mode() { "-DEV" } else { "" };
+    format!("{APP_NAME} v{APP_VERSION}{suffix}")
+}