Please address the comments from this code review:

## Individual Comments

### Comment 1
<location> `src/nonebot_plugin_liteperm/nodelib.py:109-110` </location>
<code_context>
             self.permissions_data = json.load(f)
         self.__dump_to_str(overwrite=True)

+    def from_perm_str(self, perm_str: str):
+        for line in perm_str.split("\n"):
+            if line.strip() == "":
+                continue
</code_context>

<issue_to_address>
**issue:** The new 'from_perm_str' method does not handle malformed lines robustly.

Lines without a space will cause a ValueError on split. Add validation or error handling to skip or report these cases and avoid runtime exceptions.
</issue_to_address>

### Comment 2
<location> `src/nonebot_plugin_liteperm/commands/cmd_utils.py:18` </location>
<code_context>
async def parse_command(
    matcher: Matcher, args: Message = CommandArg()
) -> tuple[str, str, str, str, str]:
    """统一参数解析器"""
    args_list = args.extract_plain_text().strip().split(maxsplit=5)

    # 参数校验
    if len(args_list) < 1:
        await matcher.finish("❌ 缺少ID")
    if len(args_list) < 3:
        await matcher.finish("❌ 参数不足，需要至少3个参数")

    id = args_list[0]
    action_type = args_list[1]
    operation = args_list[2]
    target = args_list[3] if len(args_list) >= 4 else ""
    value = args_list[4] if len(args_list) == 5 else ""

    return id, action_type, operation, target, value

</code_context>

<issue_to_address>
**issue (code-quality):** Don't assign to builtin variable `id` ([`avoid-builtin-shadow`](https://docs.sourcery.ai/Reference/Default-Rules/comments/avoid-builtin-shadow/))

<br/><details><summary>Explanation</summary>Python has a number of `builtin` variables: functions and constants that
form a part of the language, such as `list`, `getattr`, and `type`
(See https://docs.python.org/3/library/functions.html).
It is valid, in the language, to re-bind such variables:

```python
list = [1, 2, 3]
```
However, this is considered poor practice.
- It will confuse other developers.
- It will confuse syntax highlighters and linters.
- It means you can no longer use that builtin for its original purpose.

How can you solve this?

Rename the variable something more specific, such as `integers`.
In a pinch, `my_list` and similar names are colloquially-recognized
placeholders.</details>
</issue_to_address>