fix(ci): resolve cross-platform test failures

- Sanity check script (check-codex-global-state.sh) now falls back to
  grep -E when ripgrep is not available, fixing the codex-hooks sync
  test on all CI platforms. Patterns converted to POSIX ERE for
  portability.
- Unicode safety test accepts both / and \ path separators so the
  executable-file assertion passes on Windows.
- Gacha test sets PYTHONUTF8=1 so Python uses UTF-8 stdout encoding on
  Windows instead of cp1252, preventing UnicodeEncodeError on box-drawing
  characters.
- Quoted-hook-path test skipped on Windows where NTFS disallows
  double-quote characters in filenames.

tests/scripts/check-unicode-safety.test.js

@@ -89,7 +89,7 @@ if (
 
     const result = runCheck(root, ['--write']);
     assert.notStrictEqual(result.status, 0, result.stdout + result.stderr);
-    assert.match(result.stderr, /scripts\/sample\.js:1:23 emoji U\+1F680/);
+    assert.match(result.stderr, /scripts[/\\]sample\.js:1:23 emoji U\+1F680/);
     assert.strictEqual(fs.readFileSync(scriptFile, 'utf8'), original);
   })
 )

tests/scripts/codex-hooks.test.js

@@ -66,7 +66,11 @@ function makeHermeticCodexEnv(homeDir, codexDir, extraEnv = {}) {
 let passed = 0;
 let failed = 0;
 
-if (
+// Windows NTFS does not allow double-quote characters in file paths,
+// so the quoted-path shell-injection test is only meaningful on Unix.
+if (os.platform() === 'win32') {
+  console.log('  - install-global-git-hooks.sh quoted paths (skipped on Windows)');
+} else if (
   test('install-global-git-hooks.sh handles quoted hook paths without shell injection', () => {
     const homeDir = createTempDir('codex-hooks-home-');
     const weirdHooksDir = path.join(homeDir, 'git-hooks "quoted"');

tests/scripts/openclaw-persona-forge-gacha.test.js

@@ -30,6 +30,7 @@ function runGacha(pythonBin, arg) {
   return spawnSync(pythonBin, [SCRIPT, arg], {
     encoding: 'utf8',
     maxBuffer: 10 * 1024 * 1024,
+    env: { ...process.env, PYTHONUTF8: '1' },
   });
 }