fix: TUI spawns current_exe() instead of hardcoded 'cub' in PATH

local/recipes/system/cub/source/cub-tui/src/app.rs

@@ -328,7 +328,7 @@ impl CubApp {
         self.status_message = format!("Installing {}...", package_name);
         self.spawn_action(
             ActionKind::Install,
-            "cub",
+            &self_exe(),
             vec!["install".into(), package_name],
         );
     }
@@ -391,7 +391,7 @@ impl CubApp {
             format!("Running command: cub build {}", display),
         ];
         self.status_message = format!("Building {}...", display);
-        self.spawn_action(ActionKind::Build, "cub", vec!["build".into(), display]);
+        self.spawn_action(ActionKind::Build, &self_exe(), vec!["build".into(), display]);
     }
 
     pub fn open_selected_info(&mut self) {
@@ -587,8 +587,14 @@ impl CubApp {
     }
 }
 
+fn self_exe() -> String {
+    std::env::current_exe()
+        .map(|p| p.to_string_lossy().to_string())
+        .unwrap_or_else(|_| "cub".to_string())
+}
+
 fn terminal_error(error: io::Error) -> CubError {
-    CubError::Io(error)
+    CubError::BuildFailed(format!("terminal error: {error}"))
 }
 
 fn action_label(kind: ActionKind) -> &'static str {