fix(utils): skip empty string translations when applying locale

[asynchroza]

Translation records may include empty strings for fields the Admin UI did not localize (e.g. title left blank while description is set). Those values must not overwrite the base entity fields.

Summary

What — What changes are introduced in this PR?

In the translation function, we first check whether the string is empty. If it is empty, we leave the original translation unchanged instead of overriding it.

Why — Why are these changes relevant or necessary?

This is done to prevent making two separate UI requests when merging translation entries and resolving fallbacks properly.

Testing — How have these changes been tested, or how can the reviewer test the feature?

Add the translation module and configure two languages. Create a product with the title defined only in the default language, and the description defined in both languages. When fetching the product using the secondary language locale, the title should fall back to the default language value, while the description should appear in the secondary language. Without this fix, the title would be returned as empty.

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Checklist

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[changeset-bot]

🦋 Changeset detected

Latest commit: cb6c0fc

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 77 packages

Name	Type
@medusajs/utils	Major
@medusajs/event-bus-redis	Major
@medusajs/framework	Major
@medusajs/modules-sdk	Major
@medusajs/orchestration	Major
@medusajs/workflows-sdk	Major
@medusajs/cli	Major
@medusajs/medusa-oas-cli	Major
integration-tests-http	Patch
@medusajs/medusa	Major
@medusajs/test-utils	Major
@medusajs/analytics	Major
@medusajs/api-key	Major
@medusajs/auth	Major
@medusajs/cache-inmemory	Major
@medusajs/cache-redis	Major
@medusajs/caching	Major
@medusajs/cart	Major
@medusajs/currency	Major
@medusajs/customer	Major
@medusajs/event-bus-local	Major
@medusajs/file	Major
@medusajs/fulfillment	Major
@medusajs/index	Major
@medusajs/inventory	Major
@medusajs/link-modules	Major
@medusajs/locking	Major
@medusajs/notification	Major
@medusajs/order	Major
@medusajs/payment	Major
@medusajs/pricing	Major
@medusajs/product	Major
@medusajs/promotion	Major
@medusajs/rbac	Major
@medusajs/region	Major
@medusajs/sales-channel	Major
@medusajs/settings	Major
@medusajs/stock-location	Major
@medusajs/store	Major
@medusajs/tax	Major
@medusajs/translation	Major
@medusajs/user	Major
@medusajs/workflow-engine-inmemory	Major
@medusajs/workflow-engine-redis	Major
@medusajs/analytics-local	Major
@medusajs/analytics-posthog	Major
@medusajs/auth-emailpass	Major
@medusajs/auth-github	Major
@medusajs/auth-google	Major
@medusajs/caching-redis	Major
@medusajs/file-local	Major
@medusajs/file-s3	Major
@medusajs/fulfillment-manual	Major
@medusajs/locking-postgres	Major
@medusajs/locking-redis	Major
@medusajs/notification-local	Major
@medusajs/notification-sendgrid	Major
@medusajs/payment-stripe	Major
@medusajs/draft-order	Major
@medusajs/core-flows	Major
@medusajs/oas-github-ci	Major
@medusajs/js-sdk	Major
@medusajs/types	Major
@medusajs/http-types-generator	Major
@medusajs/deps	Major
@medusajs/telemetry	Major
@medusajs/admin-bundler	Major
@medusajs/admin-sdk	Major
@medusajs/admin-shared	Major
@medusajs/admin-vite-plugin	Major
@medusajs/dashboard	Major
@medusajs/icons	Major
@medusajs/toolbox	Major
@medusajs/ui-preset	Major
create-medusa-app	Major
medusa-dev-cli	Major
@medusajs/ui	Patch

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[medusa-os-bot]

Thank you for your contribution!

After reviewing this PR, we need a few things addressed before we can move forward:

Required changes:

• Please fill in the How section of the PR description (it's currently missing). Describe how the change was implemented — e.g. which condition was added and where in apply-translations.ts.
• Verify the changeset bump type. The changeset bot reports @medusajs/utils: Major, but this is a bug fix and should be patch. Please run yarn changeset and select patch when prompted, or update .changeset/honest-planes-walk.md directly.

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