Feature: Added support for changing the size format

[yaira2]

Resolved / Related Issues

To prevent extra work, all changes to the Files codebase must link to an approved issue marked as Ready to build. Please insert the issue number following the hashtag with the issue number that this Pull Request resolves.

• Closes Feature: Ability to customize the way file sizes are displayed (units and decimal/binary bytes) #10075

Steps used to test these changes

Stability is a top priority for Files and all changes are required to go through testing before being merged into the repo. Please include a list of steps that you used to test this PR.

1. Confirmed the size unit reflects the selected option in settings

[Copilot]

Pull Request Overview

This PR adds support for changing the size format displayed in the app, allowing users to choose between binary and decimal units.

• Introduces a new view model property and corresponding user setting for the size unit format.
• Updates size conversion logic in both view models and utility methods.
• Adds a new enum and updates settings contracts to support the new size format selection.

Reviewed Changes

Copilot reviewed 6 out of 8 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/Files.App/ViewModels/Settings/FoldersViewModel.cs	Adds SizeUnitsOptions initialization and SizeUnitFormat property for managing size display format.
src/Files.App/Services/Settings/FoldersSettingsService.cs	Introduces a new SizeUnitFormat property to persist the user’s size format choice.
src/Files.App/Extensions/StringExtensions.cs	Adjusts size string conversion logic based on the selected size unit format.
src/Files.App/Data/Models/ByteSize.cs	Updates ShortString to use the appropriate size value based on the user preference.
src/Files.App/Data/Enums/SizeUnitTypes.cs	Defines the enum representing available size unit formats.
src/Files.App/Data/Contracts/IFoldersSettingsService.cs	Extends the settings service contract to include SizeUnitFormat.

Files not reviewed (2)

• src/Files.App/Strings/en-US/Resources.resw: Language not supported
• src/Files.App/Views/Settings/FoldersPage.xaml: Language not supported

[0x5bfa]

Tested locally, confirmed working well.
Settings title could be more descriptive maybe?

[dongle-the-gadget]

On my machine, the toggle doesn't immediately refresh the view, causing the page to show units based on the old setting until the user navigates to a new page or manually refresh.

[0x5bfa]

On my machine, the toggle doesn't immediately refresh the view, causing the page to show units based on the old setting until the user navigates to a new page or manually refresh.

I clicked the Refresh button to test, wouldnt it b challenging to reflect the change automatically? @yaira2

[yaira2]

On my machine, the toggle doesn't immediately refresh the view, causing the page to show units based on the old setting until the user navigates to a new page or manually refresh.

This should be addressed with my latest commit.

[yaira2]

Tested locally, confirmed working well. Settings title could be more descriptive maybe?

We can technically display an example, but let's see how this works first.