test: unify i18next mocks into centralized helpers

[tomerqodo]

Benchmark PR from qodo-benchmark#129

[greptile-apps]

Greptile Overview

Greptile Summary

Centralizes i18next mock helpers into a new web/test/i18n-mock.ts module with reusable factory functions. Refactors 17 test files to use the centralized helpers, eliminating ~293 lines of duplicated mock code. Updates documentation and test templates to reference the new helper functions.

Confidence Score: 5/5

• Safe to merge—excellent refactoring that improves test maintainability without changing functionality
• This is a pure refactoring that consolidates duplicated i18n mock code into reusable helpers. All test files correctly use the new centralized functions, test assertions were updated to match global mock behavior, and documentation was comprehensively updated. No functional changes to production code.
• No files require special attention

Important Files Changed

File Analysis

Filename	Score	Overview
web/test/i18n-mock.ts	5/5	New centralized i18n mock helper module with well-designed factory functions for creating translation mocks
web/vitest.setup.ts	5/5	Updated to use centralized i18n mock helper, reducing code duplication and improving maintainability
web/testing/testing.md	5/5	Updated documentation to reference new centralized i18n mock helpers and usage patterns
.claude/skills/frontend-testing/references/mocking.md	5/5	Updated mocking guide to reference new createReactI18nextMock helper and usage examples
web/app/components/plugins/marketplace/index.spec.tsx	5/5	Removed redundant i18n mock and updated test assertions to match global mock behavior (namespace prefixing)

Sequence Diagram

sequenceDiagram
    participant Dev as Developer
    participant Test as Test File
    participant Helper as i18n-mock.ts
    participant Setup as vitest.setup.ts
    
    Dev->>Test: "Write test"
    
    alt Test needs custom translations
        Test->>Helper: "Import createReactI18nextMock"
        Test->>Test: "vi.mock with custom translations"
        Helper-->>Test: "Return mock with translations"
    else Test uses default behavior
        Setup->>Helper: "Import createReactI18nextMock"
        Setup->>Setup: "Setup global mock"
        Test->>Setup: "Use global mock"
        Setup-->>Test: "Keys returned with namespace"
    end
    
    Test->>Test: "Run test assertions"

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