Analyzer安定化完了: NYASH_DISABLE_PLUGINS=1復元 + plugin無効化根治

## 修正内容
1. **hako_check.sh/run_tests.sh**: NYASH_DISABLE_PLUGINS=1 + NYASH_BOX_FACTORY_POLICY=builtin_first追加
2. **src/box_factory/plugin.rs**: NYASH_DISABLE_PLUGINS=1チェック追加
3. **src/box_factory/mod.rs**: plugin shortcut pathでNYASH_DISABLE_PLUGINS尊重
4. **tools/hako_check/render/graphviz.hako**: smart quotes修正（parse error解消）

## 根本原因
- NYASH_USE_PLUGIN_BUILTINS=1が自動設定され、ArrayBox/MapBoxがplugin経由で生成を試行
- bid/registry.rsで"Plugin loading temporarily disabled"の状態でも試行されエラー
- mod.rs:272のshortcut pathがNYASH_DISABLE_PLUGINSを無視していた

## テスト結果
- 10/11 PASS（HC011,13-18,21-22,31）
- HC012: 既存issue（JSON安定化未完）

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

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

tools/hako_check/cli.hako

@@ -1,4 +1,4 @@
-// tools/hako_check/cli.hako — HakoAnalyzerBox (MVP)
+// tools/hako_check/cli.hako - HakoAnalyzerBox (MVP)
 using selfhost.shared.common.string_helpers as Str
 using tools.hako_check.analysis_consumer as HakoAnalysisBuilderBox
 using tools.hako_check.rules.rule_include_forbidden as RuleIncludeForbiddenBox
@@ -65,7 +65,7 @@ static box HakoAnalyzerBox {
       }
       // keep a copy before sanitize for rules that must see original bytes (HC017, etc.)
       local text_raw = text
-      // pre-sanitize (ASCII quotes, normalize newlines) — minimal & reversible
+      // pre-sanitize (ASCII quotes, normalize newlines) - minimal & reversible
       text = me._sanitize(text)
       // analysis - only build IR if needed by active rules
       local ir = null
@@ -80,7 +80,7 @@ static box HakoAnalyzerBox {
         ir.set("boxes", new ArrayBox())
         ir.set("entrypoints", new ArrayBox())
       }
-      // parse AST only when explicitly needed by active rules（include_forbiddenはfallback可）
+      // parse AST only when explicitly needed by active rules (include_forbidden fallback allowed)
       local ast = null
       if no_ast == 0 && me._needs_ast(rules_only, rules_skip) == 1 { ast = HakoParserCoreBox.parse(text) }
       if debug == 1 {
@@ -287,7 +287,7 @@ static box HakoAnalyzerBox {
       if me._is_hc011(s) == 1 {
         local qual = me._extract_method_from_hc011(s)
         if qual != null {
-          // method qual: Box.method/arity → Box
+          // method qual: Box.method/arity -> Box
           local dot = qual.lastIndexOf(".")
           if dot > 0 {
           local box_name = qual.substring(0, dot)