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/run_tests.sh

@@ -38,15 +38,39 @@ run_case() {
   fi
   # Build argv array for analyzer CLI (preserve newlines in text)
   ARGS=( --debug --format json-lsp )
+  # Restrict rules to the target under test for stability
+  local base
+  base="$(basename "$dir")"
+  local rules_key=""
+  case "$base" in
+    HC011_*) rules_key="dead_methods" ;;
+    HC012_*) rules_key="dead_static_box" ;;
+    HC013_*) rules_key="duplicate_method" ;;
+    HC014_*) rules_key="missing_entrypoint" ;;
+    HC015_*) rules_key="arity_mismatch" ;;
+    HC016_*) rules_key="unused_alias" ;;
+    HC017_*) rules_key="non_ascii_quotes" ;;
+    HC018_*) rules_key="top_level_local" ;;
+    HC021_*) rules_key="analyzer_io_safety" ;;
+    HC022_*) rules_key="stage3_gate" ;;
+    HC031_*) rules_key="brace_heuristics" ;;
+    *) rules_key="" ;;
+  esac
+  if [ -n "$rules_key" ]; then ARGS+=( --rules "$rules_key" ); fi
   if [ -f "$input_ok" ]; then ARGS+=( --source-file "$path_ok" "$text_ok" ); fi
   if [ -f "$input_ng" ]; then ARGS+=( --source-file "$path_ng" "$text_ng" ); fi
 
   # Directly invoke analyzer CLI with args via '--', avoid wrapper/FS
+  # Ensure plugin path is set
+  export LD_LIBRARY_PATH="${ROOT}/target/release:${LD_LIBRARY_PATH:-}"
+
   NYASH_DISABLE_NY_COMPILER=1 HAKO_DISABLE_NY_COMPILER=1 \
   NYASH_PARSER_STAGE3=1 HAKO_PARSER_STAGE3=1 NYASH_PARSER_SEAM_TOLERANT=1 HAKO_PARSER_SEAM_TOLERANT=1 \
   NYASH_ENABLE_USING=1 HAKO_ENABLE_USING=1 NYASH_USING_AST=1 \
+  NYASH_DISABLE_PLUGINS=1 \
+  NYASH_BOX_FACTORY_POLICY=builtin_first \
   NYASH_JSON_ONLY=1 \
-  "$BIN" --backend vm tools/hako_check/cli.hako -- "${ARGS[@]}" >"$tmp_out" 2>&1 || true
+  "$BIN" --backend vm "$ROOT/tools/hako_check/cli.hako" -- "${ARGS[@]}" >"$tmp_out" 2>&1 || true
   # Extract diagnostics JSON (one-line or pretty block)
   tmp_json="/tmp/hako_test_json_$$.json"
   json_line=$(grep -m1 '^\{"diagnostics"' "$tmp_out" || true)