chore: add pre-commit hook to reject *@bytedance.com author/committer email

Co-authored-by: Cursor <cursoragent@cursor.com>

.githooks/pre-commit

@@ -0,0 +1,29 @@
+#!/bin/sh
+# Reject commit if author or committer email is *@bytedance.com
+
+config_email="$(git config user.email)"
+author_email="${GIT_AUTHOR_EMAIL:-$config_email}"
+committer_email="${GIT_COMMITTER_EMAIL:-$config_email}"
+
+check() {
+  case "$1" in
+    *@bytedance.com) return 0;;  # matched = bad
+    *) return 1;;
+  esac
+}
+
+err=0
+if check "$author_email"; then
+  echo "pre-commit: 拒绝提交：作者邮箱不能为 *@bytedance.com (当前: $author_email)"
+  err=1
+fi
+if check "$committer_email"; then
+  echo "pre-commit: 拒绝提交：提交者邮箱不能为 *@bytedance.com (当前: $committer_email)"
+  err=1
+fi
+
+if [ $err -eq 1 ]; then
+  echo "请使用: git config user.email \"lofisuchat@gmail.com\""
+  exit 1
+fi
+exit 0