Improve action validation system

[paul-fresquet]

This pull request introduces a comprehensive framework for validating atomic actions in the synchronization process, including new enums and result classes, and updates to resource files for localization. The main focus is on improving how validation failures are tracked, categorized, and displayed to users, with support for both English and French.

Validation Framework Enhancements

• Added the AtomicActionValidationFailureReason enum to categorize all possible validation failure reasons for atomic actions, making validation logic more structured and maintainable (AtomicActionValidationFailureReason.cs).
• Introduced the AtomicActionValidationResult class to encapsulate the result of a validation check, including whether it passed and the specific failure reason if it did not (AtomicActionValidationResult.cs).
• Refactored AtomicActionConsistencyCheckCanAddResult to use a list of ComparisonItemValidationResult objects, replacing the previous valid/invalid sets, and added methods to retrieve valid and invalid items and validation results. This change enables more granular tracking and reporting of validation outcomes (AtomicActionConsistencyCheckCanAddResult.cs).

Localization and UI Improvements

• Updated English and French resource files (Resources.resx, Resources.fr.resx) to include new localized strings for all validation failure reasons, UI messages about action issues, and item pluralization. This ensures users receive clear feedback about validation failures in their preferred language. [1] [2]
• Added corresponding property accessors in the auto-generated designer file (Resources.Designer.cs) for each new string resource, allowing code to easily retrieve localized messages for display in the UI.

[sonarqubecloud]

Quality Gate passed

Issues
85 New issues
0 Accepted issues

Measures
0 Security Hotspots
84.8% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[Copilot]

Pull Request Overview

This pull request introduces a comprehensive framework for validating atomic actions in the synchronization process. The main goal is to improve how validation failures are tracked, categorized, and displayed to users with proper localization support for both English and French.

• Validation Framework: Adds enums and result classes to systematically categorize and report atomic action validation failures
• Enhanced UI: Updates the targeted action dialog to show detailed validation failure information with tooltips
• Localization: Adds comprehensive localized strings for all validation failure reasons in English and French

Reviewed Changes

Copilot reviewed 70 out of 72 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
AtomicActionValidationFailureReason.cs	Introduces enum with 48 categorized validation failure reasons
AtomicActionValidationResult.cs	Encapsulates validation results with success/failure states
AtomicActionConsistencyChecker.cs	Refactored to return detailed validation results instead of boolean checks
TargetedActionGlobalViewModel.cs	Enhanced to display detailed validation failures with localized messages
TargetedActionGlobalView.axaml	Updated UI to show validation failure summaries with tooltips
Resources.resx/Resources.fr.resx	Added 100+ localized strings for validation messages
Test files	Comprehensive test coverage for new validation components

Files not reviewed (1)

• src/ByteSync.Client/Assets/Resources/Resources.Designer.cs: Language not supported

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