fix(pc-audit): .gitattributes で BOM を保証、runner のエラーハンドリング改善

.gitattributes

@@ -0,0 +1 @@
+tools/pc-audit/Invoke-PcAudit.ps1 text working-tree-encoding=UTF-8-BOM

scripts/run-pc-audit.js

@@ -0,0 +1,46 @@
+#!/usr/bin/env node
+import { readFileSync, writeFileSync } from 'fs';
+import { spawnSync } from 'child_process';
+import { dirname, join } from 'path';
+import { fileURLToPath } from 'url';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const rootDir = join(__dirname, '..');
+const psScript = join(rootDir, 'tools', 'pc-audit', 'Invoke-PcAudit.ps1');
+
+function ensureUtf8Bom(filePath) {
+  let data;
+  try {
+    data = readFileSync(filePath);
+  } catch {
+    console.error('[pc-audit] Invoke-PcAudit.ps1 が見つかりません:', filePath);
+    process.exit(1);
+  }
+  const hasBom = data.length >= 3 && data[0] === 0xef && data[1] === 0xbb && data[2] === 0xbf;
+  if (hasBom) return false;
+  writeFileSync(filePath, Buffer.concat([Buffer.from([0xef, 0xbb, 0xbf]), data]));
+  return true;
+}
+
+function run() {
+  const shareSafe = process.argv.includes('--share-safe');
+  const bomAdded = ensureUtf8Bom(psScript);
+  if (bomAdded) {
+    console.log('[pc-audit] Invoke-PcAudit.ps1 に UTF-8 BOM を自動付与しました。');
+  }
+
+  const args = ['-NoProfile', '-ExecutionPolicy', 'Bypass', '-File', psScript];
+  if (shareSafe) args.push('-ShareSafe');
+
+  const result = spawnSync('powershell', args, {
+    cwd: rootDir,
+    stdio: 'inherit',
+  });
+
+  if (result.error) {
+    console.error('[pc-audit] PowerShell 起動失敗:', result.error.message);
+  }
+  process.exit(result.status ?? 1);
+}
+
+run();