fix: Fix content type header

[benjaminVadon]

No description provided.

[Copilot]

Pull request overview

This PR fixes how default HTTP request headers are applied for Ktor clients, ensuring Accept / Content-Type are set using Ktor’s dedicated APIs (instead of custom header keys), which improves content negotiation and response validation consistency across the network layer.

Changes:

• Refactors HttpUtils.applyDefaultHeaders to set Accept and Content-Type via Ktor request builder helpers and standard HttpHeaders keys.
• Updates Ktor defaultRequest { ... } usage in clients to call applyDefaultHeaders() directly rather than nesting it under headers { ... }.
• Corrects previously incorrect header names (e.g., Accept-type) by using canonical header constants.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
TwoFactorAuth/Back/src/main/kotlin/TwoFactorAuthImpl.kt	Updates Ktor defaultRequest to apply default headers correctly at the request-builder level.
Network/src/main/kotlin/com/infomaniak/core/network/networking/HttpUtils.kt	Refactors default header application to use Ktor APIs and canonical header names (Accept, Content-Type, etc.).
Network/Ktor/src/main/kotlin/CreateHttpClient.kt	Updates default Ktor client creation to apply the new default header logic.

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

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

See analysis details on SonarQube Cloud