fix(fs): panic when failed to get storage details

[KirCute]

Description / 描述

修复

1. beta 版本显示驱动剩余空间时/fs/list会 panic 的问题。
2. 115open 驱动在总空间大于约 100TiB 后，API 返回的总空间数值会变成浮点数，导致反序列化为 int64 失败。

问题1原因：一个很神奇的问题，简单地说，以下代码会 panic：

type DiskUsage struct {}

func (d DiskUsage) MarshalJSON() ([]byte, error) {
    // 没有这个函数时不会 panic
}

type StorageDetails struct {
    DiskUsage
}

type StorageDetailsWithName struct {
    *StorageDetails
    Name string `json:"name"`
}

func main() {
    _, _ = json.Marshal(&StorageDetailsWithName{
        StorageDetails: nil,
        Name: "",
    })
}

考虑到name字段已无作用，删除了StorageDetailsWithName结构体。

Motivation and Context / 背景

How Has This Been Tested? / 测试

没测

Checklist / 检查清单

• I have read the CONTRIBUTING document.
  我已阅读 CONTRIBUTING 文档。
• I have formatted my code with go fmt or prettier.
  我已使用 go fmt 或 prettier 格式化提交的代码。
• I have added appropriate labels to this PR (or mentioned needed labels in the description if lacking permissions).
  我已为此 PR 添加了适当的标签（如无权限或需要的标签不存在，请在描述中说明，管理员将后续处理）。
• I have requested review from relevant code authors using the "Request review" feature when applicable.
  我已在适当情况下使用"Request review"功能请求相关代码作者进行审查。
• I have updated the repository accordingly (If it’s needed).
  我已相应更新了相关仓库（若适用）。
  • OpenList-Frontend #XXXX
  • OpenList-Docs #XXXX

[hhsw2015]

我昨天遇到了后台样式显示前台那个存储空间显示。会出现 驱动列表显示不出来的情况。必须隐藏显示空间详情 才正常。是不是和这个有关？

[hhsw2015]

确实是这个问题引起的 刚测试 能正常显示容量信息

[Copilot]

Pull request overview

This PR fixes two critical bugs related to storage details display: a panic in /fs/list when showing storage space in the beta version, and a deserialization failure in the 115open driver when total space exceeds 100TiB (where the API returns floating-point numbers instead of integers).

Changes:

• Removed StorageDetailsWithName struct to fix panic caused by JSON marshaling of nil embedded pointers
• Added ParseInt64 utility function to handle both integer and floating-point storage size values from the 115open API
• Updated receiver type from value to pointer for GetStorageDetails method

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
internal/model/storage.go	Removed StorageDetailsWithName wrapper struct, simplified ObjStorageDetails to directly embed *StorageDetails, improved method receiver consistency
server/handles/fsread.go	Updated ObjResp.MountDetails field type from *StorageDetailsWithName to *StorageDetails
internal/op/storage.go	Simplified ObjStorageDetails initialization by removing nested struct wrapper
drivers/alias/util.go	Simplified ObjStorageDetails initialization in root listing
drivers/alias/driver.go	Updated storage details assignment to use simplified structure
drivers/115_open/util.go	Added ParseInt64 function to handle both int64 and float64 values from API responses
drivers/115_open/driver.go	Integrated ParseInt64 for parsing storage space values

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.