fix: mount point drag-and-drop reorder not persisted on save

[Copilot]

Reordering mount points via drag-and-drop and saving had no effect — the order reset on refresh. Toggling visibility worked fine because the checkbox handler called onSettingsChange; the onDrop handler did not.

Change

• MountPointsList.tsx — onDrop now calls onSettingsChange with the reordered visible mount points, matching the pattern already used in the checkbox handler and in TorrentListColumnsList:

// Before
onDrop={(items) => {
  setDiskItems(items.map((id) => ({id, visible: diskItemVisiblity[id]})));
}}

// After
onDrop={(items) => {
  const newItems = items.map((id) => ({id, visible: diskItemVisiblity[id]}));
  onSettingsChange({
    mountPoints: newItems.filter((newItem) => newItem.visible).map((newItem) => newItem.id),
  });
  setDiskItems(newItems);
}}

Original prompt

---

This section details on the original issue you should resolve

<issue_title>mountpath order only change not saved</issue_title>
<issue_description>Type: Bug Report

• Try to follow the update procedure described in the README and try again before opening this issue.

Your Environment

• Version used:
  • Version: master branch
  • Commit ID (development release) 2b652f8
• Environment name and version:
  • Node.js version: 18.17.0
  • npm version: 9.8.1
  • Web browser: Chrome/116.0.0.0
• Operating system and version: debian10
• Torrent client and version: rtorrent jesec version

Summary

mountpath config page support drag and drop for sorting, but click save doesn't working.

Expected Behavior

Current Behavior

click save, refresh, then the order get reset

Possible Solution

Steps to Reproduce

1. change mountpath order
2. save config
3. refresh
4. find mount path order not saved

Context

if any selected mountPaths changed, the order will be updated as expected.

</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes mountpath order only change not saved #670

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[codecov]

Codecov Report

❌ Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 22.20%. Comparing base (7322d4a) to head (d1ceca5).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...ts/modals/settings-modal/lists/MountPointsList.tsx	0.00%	5 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1056   +/-   ##
=======================================
  Coverage   22.19%   22.20%           
=======================================
  Files         412      412           
  Lines       27571    27575    +4     
  Branches     1282     1280    -2     
=======================================
+ Hits         6119     6122    +3     
- Misses      21154    21155    +1     
  Partials      298      298           

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