fix(i18n): Data initialization and carousel translations @nfebe

[nfebe]

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[cloudflare-workers-and-pages]

Deploying webui with    Cloudflare Pages

Latest commit:	64063e2
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Preview URL:	https://0143d4c5.webui-9fh.pages.dev
Branch Preview URL:	https://fix-i18n-data-initialization.webui-9fh.pages.dev

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Code Review Summary

This pull request introduces significant enhancements to the application's onboarding process and internationalization. A new useOnboardingStatus composable centralizes onboarding state management, leading to a more robust and maintainable flow across login, dashboard, and the onboarding wizard itself. Internationalization has been extended to the authentication carousel, and default prop values have been added for increased component stability. Minor bug fixes and readability improvements are also included.

🚀 Key Improvements

• Centralized Onboarding Logic: The introduction of composables/useOnboardingStatus.ts consolidates onboarding state and logic, making the flow more manageable and consistent.
• Enhanced Internationalization: The AuthCarousel is now fully internationalized, and useDataManager handles language preferences more robustly via cookies.
• Improved Prop Definitions: components/ContentCard.vue now uses more explicit prop definitions with default values, enhancing component reliability.

💡 Minor Suggestions

• Consider more explicit error logging in pages/onboarding.vue's onBeforeRouteLeave hook to capture potential issues with onboarding completion API calls.
• Clarify the necessity of resetAuthMiddlewareState in middleware/auth.ts if it's currently a no-op.
• Review the httpOnly setting for the auth.token cookie if client-side JavaScript access is not strictly required, to improve security against XSS.

[sourceant]

Review complete. No specific code suggestions were generated. See the overview comment for a summary.