fix(ui): show available space instead of total capacity in size info widget

[GongHeng2017]

fix(ui): show available space instead of total capacity in size info widget

The capacity bar label in the disk/partition detail view was showing
total capacity. Per product decision, change it to show available space
(available = total - used) with the label 'Available:' instead of the
partition path + 'Capacity:'.

Log: Update capacity bar legend to display available space
Bug: https://pms.uniontech.com/bug-view-204631.html

Summary by Sourcery

Show available space rather than total capacity in the size information widget.

Bug Fixes:

• Display available disk or partition space in the size information widget instead of total capacity.

Enhancements:

• Update the capacity bar legend to use the “Available:” label and show available-space values across partition, logical-volume, device, and decrypted LUKS views.

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: GongHeng2017

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[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

The widget now derives and stores available space for partition, logical-volume, device, and decrypted LUKS data, then displays that value under an “Available:” legend in place of total capacity in both capacity-bar rendering paths.

Flow diagram for available-space size info rendering

flowchart LR
    A["PartitionInfo, LVInfo, or DeviceInfo"] --> B["setData()"]
    B --> C["Calculate available space"]
    C --> D["Override with decrypted LUKS filesystem free space"]
    D --> E["paintEvent()"]
    E --> F["Display Available: value"]

Loading

File-Level Changes

Change	Details	Files
Track available-space values alongside used and total sizes for all supported storage data sources.	Calculate formatted available space from partition, logical-volume, and device filesystem metadata. Use decrypted LUKS mapper usage data when available, including unavailable placeholders for encrypted logical volumes that are not decrypted.	application/widgets/customcontrol/sizeinfowidget.cpp application/widgets/customcontrol/sizeinfowidget.h
Update the capacity-bar legend to present available space instead of total capacity.	Replace the partition-path/Capacity label with Available. Render and size the legend value using the new available-space field in both painting paths.	application/widgets/customcontrol/sizeinfowidget.cpp

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Hey - I've reviewed your changes and they look great!

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[GongHeng2017]

/forcemerge

[deepin-bot]

This pr force merged! (status: unstable)