refactor: simplify vpr iterator construction with bool::then_some

Author: fengmk2

packages/cli/binding/src/cli.rs

@@ -558,12 +558,11 @@ impl CommandHandler for VitePlusCommandHandler {
             return Ok(HandledCommand::Verbatim);
         }
         // "vpr <args>" is shorthand for "vp run <args>", so prepend "run" for parsing.
+        let is_vpr = program == "vpr";
         let cli_args = match CLIArgs::try_parse_from(
-            iter::once("vp").chain(
-                if program == "vpr" { Some("run") } else { None }
-                    .into_iter()
-                    .chain(command.args.iter().map(Str::as_str)),
-            ),
+            iter::once("vp")
+                .chain(is_vpr.then_some("run"))
+                .chain(command.args.iter().map(Str::as_str)),
         ) {
             Ok(args) => args,
             Err(err) if err.kind() == ErrorKind::InvalidSubcommand => {