[aholbreich]

Fixes #72. Thanks @jotapesse for the English-UI/Portuguese-date report.

Give dates and times a separate locale in list/columns, grid and modified/deleted details:

• Nonempty LC_ALL takes precedence over LC_TIME.
• Without an override, keep the UI-language formats and live switching.
• Explicit C/POSIX locales use Qt's C formats. Unrecognized values fall back to the UI language; invalid nonempty LC_ALL does not try LC_TIME.
• Preserve locale scripts, translations, numeric formatting, sorting and RTL behavior.

This proposes an explicit regional override to #31's language-coupled date policy; prior maintainer agreement is not assumed. Environment changes require restart.

Testing on Qt 6.12 / CMake 3.31.6:

• bin/build, bin/test and CTest pass on base and fixed copies in a no-network Bubblewrap sandbox: 192 existing checks plus 13 new locale cases on the fixed tree.
• Original Date/Time Format Doesn't Follow Regional Date/Time Locale Settings #72 and script-loss negative controls fail as expected. Exact field assertions cover all date views and live language switching.
• Passing full-suite profile uses en_US.UTF-8 without the optional KDE RAW decoder. Existing C-collation/CR2 expectations also fail on unchanged base; no tests were edited or skipped.

Native visual acceptance is still pending. Nothing has been installed on the live desktop.

AI-assisted implementation and tests.

[greptile-apps]

Confidence Score: 5/5

[Medium impact] The PR appears safe to merge; no blocking issues were found.

Summary

Dates and times now honor explicit regional settings without changing the UI language.

• File dates and times can follow a separate regional locale.

No actionable issues were found. This review checked the source; it did not run the tests or perform native visual acceptance.

Diagram

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    UI[UI language] --> Default[Default locale]
    Default --> Numbers[Numbers, sorting and window direction]
    All[Nonempty LC_ALL] --> Dates[Select date locale]
    Time[LC_TIME when LC_ALL is empty] --> Dates
    Default --> Fallback[Fallback when no recognized override exists]
    Fallback --> Dates
    Dates --> Property[translator.dateLocale]
    Property --> Views[List, grid and details dates]

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