feat: 配列/Mapリテラル糖衣構文の実装とネームスペース解決の改善計画

- ArrayLiteral/MapLiteralのAST定義追加
- パーサーで[...]と{...}構文をサポート
- MIR Builderでnew Box() + push/setへのdesugaring実装
- テストケースとスモークスクリプト追加
- CURRENT_TASK.mdにネームスペース解決Phase-1計画を追記
- 3段階解決順序（ローカル→エイリアス→プラグイン）の設計合意

src/runner/dispatch.rs

@@ -86,6 +86,12 @@ pub(crate) fn execute_file_with_backend(runner: &NyashRunner, filename: &str) {
                 }
                 runner.execute_mir_mode(filename);
             }
+            "vm" => {
+                if std::env::var("NYASH_CLI_VERBOSE").ok().as_deref() == Some("1") {
+                    println!("🚀 Nyash VM Backend - Executing file: {} 🚀", filename);
+                }
+                runner.execute_vm_mode(filename);
+            }
             #[cfg(feature = "cranelift-jit")]
             "jit-direct" => {
                 if std::env::var("NYASH_CLI_VERBOSE").ok().as_deref() == Some("1") {

src/runner/mod.rs

@@ -6,20 +6,8 @@
  */
 
 use nyash_rust::cli::CliConfig;
-use nyash_rust::{
-    box_trait::{StringBox, IntegerBox, BoolBox, VoidBox, AddBox},
-    tokenizer::{NyashTokenizer},
-    ast::ASTNode,
-    parser::NyashParser,
-    interpreter::NyashInterpreter,
-    mir::{MirCompiler, MirPrinter, MirInstruction},
-    backend::VM,
-};
-use nyash_rust::runtime::{NyashRuntime, NyashRuntimeBuilder};
-use nyash_rust::interpreter::SharedState;
-use nyash_rust::box_factory::user_defined::UserDefinedBoxFactory;
-use nyash_rust::core::model::BoxDeclaration as CoreBoxDecl;
-use std::sync::Arc;
+// prune heavy unused imports here; modules import what they need locally
+// pruned unused runtime imports in this module
 
 #[cfg(feature = "wasm-backend")]
 use nyash_rust::backend::{wasm::WasmBackend, aot::AotBackend};

src/runner/modes/vm.rs

@@ -183,7 +183,7 @@ impl NyashRunner {
                 // Prefer MIR signature when available, but fall back to runtime coercions to keep VM/JIT consistent.
                 let (ety, sval) = if let Some(func) = compile_result.module.functions.get("main") {
                     use nyash_rust::mir::MirType;
-                    use nyash_rust::box_trait::{NyashBox, IntegerBox, BoolBox, StringBox};
+                    use nyash_rust::box_trait::{IntegerBox, BoolBox, StringBox};
                     use nyash_rust::boxes::FloatBox;
                     match &func.signature.return_type {
                         MirType::Float => {
@@ -272,7 +272,7 @@ impl NyashRunner {
             format!("./{}", filename)
         }
 
-        use std::collections::{HashSet, VecDeque};
+        use std::collections::HashSet;
 
         fn walk_with_state(node: &ASTNode, runtime: &NyashRuntime, stack: &mut Vec<String>, visited: &mut HashSet<String>) {
             match node {