Phase 12: 統一TypeBox ABI実装開始 - ChatGPT5による極小コアABI基盤構築

- TypeBox ABI雛形: メソッドスロット管理システム追加
- Type Registry: Array/Map/StringBoxの基本メソッド定義
- Host API: C ABI逆呼び出しシステム実装
- Phase 12ドキュメント整理: 設計文書統合・アーカイブ化
- MIR Builder: クリーンアップと分離実装完了

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/backend/wasm/codegen.rs

@@ -403,7 +403,7 @@ impl WasmCodegen {
                 Ok(instructions)
             },
             
-            // Phase 9.77: BoxCall Implementation - Critical Box method calls
+            // BoxCall codegen - critical Box method calls
             MirInstruction::BoxCall { dst, box_val, method, args, effects: _ , .. } => {
                 self.generate_box_call(*dst, *box_val, method, args)
             },
@@ -576,7 +576,7 @@ impl WasmCodegen {
             .ok_or_else(|| WasmError::CodegenError(format!("Local variable not found for ValueId: {:?}", value_id)))
     }
     
-    /// Phase 9.77: Generate BoxCall method invocation
+    /// Generate BoxCall method invocation
     /// Implements critical Box methods: toString, print, equals, clone
     fn generate_box_call(&mut self, dst: Option<ValueId>, box_val: ValueId, method: &str, args: &[ValueId]) -> Result<Vec<String>, WasmError> {
         match method {