Add unit tests for models and services

- Implemented unit tests for Object model including folder and file creation, properties, and path retrieval.
- Added unit tests for Setting model covering creation, unique constraints, and type enumeration.
- Created unit tests for User model focusing on user creation, uniqueness, and group relationships.
- Developed unit tests for Login service to validate login functionality, including 2FA and token generation.
- Added utility tests for JWT creation and verification, ensuring token integrity and expiration handling.
- Implemented password utility tests for password generation, hashing, and TOTP verification.

run_tests.py

@@ -0,0 +1,56 @@
+#!/usr/bin/env python
+"""
+测试运行脚本
+
+使用方式:
+    python run_tests.py              # 运行所有测试
+    python run_tests.py models       # 只运行模型测试
+    python run_tests.py utils        # 只运行工具测试
+    python run_tests.py service      # 只运行服务测试
+    python run_tests.py --cov        # 带覆盖率运行
+"""
+import sys
+import subprocess
+
+
+def run_tests(target: str = "", coverage: bool = False):
+    """运行测试"""
+    cmd = ["pytest"]
+
+    # 添加目标路径
+    if target:
+        if target == "models":
+            cmd.append("tests/unit/models")
+        elif target == "utils":
+            cmd.append("tests/unit/utils")
+        elif target == "service":
+            cmd.append("tests/unit/service")
+        else:
+            cmd.append(target)
+    else:
+        cmd.append("tests/unit")
+
+    # 添加覆盖率选项
+    if coverage:
+        cmd.extend(["--cov", "--cov-report=term-missing"])
+
+    # 运行测试
+    print(f"运行命令: {' '.join(cmd)}")
+    result = subprocess.run(cmd)
+    return result.returncode
+
+
+if __name__ == "__main__":
+    args = sys.argv[1:]
+
+    target = ""
+    coverage = False
+
+    for arg in args:
+        if arg == "--cov":
+            coverage = True
+        else:
+            target = arg
+
+    exit_code = run_tests(target, coverage)
+    sys.exit(exit_code)