refactor: 整理项目根目录结构

整理内容:
- 删除 60+ 临时测试输出文件 (*.txt)
- 移动二进制文件到 bin/ 目录
- 移动 Shell 脚本到 scripts/ 目录
  - scripts/dev/: check_gitea.sh, check_sub2api.sh, run_tests.sh
  - scripts/deploy/: deploy_*.sh, simple_deploy.sh
  - scripts/ops/: fix_nginx.sh, fix_ssl.sh, install_docker.sh
  - scripts/test/: test_*.sh, test_*.bat
- 移动批处理文件到 scripts/
- 移动 Python 脚本到 tools/
- 清理临时日志文件

保留根目录必要文件:
- go.mod, go.sum, go.work
- Makefile, docker-compose.yml
- .env.example, .gitignore
- README.md, AGENTS.md, DEPLOY_GUIDE.md

验证: go build ./... && go test ./... 通过

scripts/test/test_api.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+
+# 用户管理系统 API 测试脚本
+
+TEST_ADMIN_ACCOUNT="${TEST_ADMIN_ACCOUNT:-admin}"
+if [ -z "${TEST_ADMIN_PASSWORD:-}" ]; then
+  echo "请先设置 TEST_ADMIN_PASSWORD"
+  exit 1
+fi
+
+echo "=== 1. 健康检查 ==="
+curl http://localhost:8080/health
+echo -e "\n"
+
+echo "=== 2. 用户注册 ==="
+curl -X POST http://localhost:8080/api/v1/auth/register \
+  -H "Content-Type: application/json" \
+  -d '{"username":"testuser","password":"Test123456","email":"test@example.com"}'
+echo -e "\n"
+
+echo "=== 3. 用户登录（admin） ==="
+LOGIN_RESPONSE=$(curl -s -X POST http://localhost:8080/api/v1/auth/login \
+  -H "Content-Type: application/json" \
+  -d "{\"account\":\"${TEST_ADMIN_ACCOUNT}\",\"password\":\"${TEST_ADMIN_PASSWORD}\"}")
+
+echo "$LOGIN_RESPONSE"
+
+# 提取token
+TOKEN=$(echo $LOGIN_RESPONSE | grep -o '"access_token":"[^"]*' | cut -d'"' -f4)
+
+echo -e "\n=== 4. 获取用户信息 ==="
+if [ -n "$TOKEN" ]; then
+    curl -X GET http://localhost:8080/api/v1/auth/userinfo \
+      -H "Authorization: Bearer $TOKEN"
+    echo -e "\n"
+else
+    echo "无法获取token，跳过此测试"
+fi
+
+echo -e "\n=== 5. 测试限流（连续快速请求） ==="
+for i in {1..6}; do
+    echo "第 $i 次登录请求："
+    curl -s -X POST http://localhost:8080/api/v1/auth/login \
+      -H "Content-Type: application/json" \
+      -d '{"account":"wrong","password":"wrong"}'
+    echo ""
+done
+
+echo -e "\n测试完成！"