Fix i18n issues on datamodel translation (#13710)

As per title, I believe calling i18n is bad because it's a singleton.

This singleton is being set back and force by users in
i18n.middleware.ts

Strategy:
we need to load the translations dynamically! Should be straight
forward:
- singleton (i18nService) containing all translationMessages
- singleton also containing a map of i18n instances loaded for each
locale => I've checked it's not heavy on RAM at all
- some methods to get the translation for a messageId x locale or the
whole i18n instance

==> use it everywhere, this PR only takes care of data model translation

packages/twenty-server/src/engine/metadata-modules/field-metadata/utils/__tests__/resolve-field-metadata-standard-override.util.spec.ts

@@ -31,6 +31,7 @@ describe('resolveFieldMetadataStandardOverride', () => {
         fieldMetadata,
         'label',
         'fr-FR',
+        mockI18n,
       );
 
       expect(result).toBe('Custom Label');
@@ -49,6 +50,7 @@ describe('resolveFieldMetadataStandardOverride', () => {
         fieldMetadata,
         'description',
         undefined,
+        mockI18n,
       );
 
       expect(result).toBe('Custom Description');
@@ -67,6 +69,7 @@ describe('resolveFieldMetadataStandardOverride', () => {
         fieldMetadata,
         'icon',
         SOURCE_LOCALE,
+        mockI18n,
       );
 
       expect(result).toBe('custom-icon');
@@ -89,6 +92,7 @@ describe('resolveFieldMetadataStandardOverride', () => {
         fieldMetadata,
         'icon',
         'fr-FR',
+        mockI18n,
       );
 
       expect(result).toBe('override-icon');
@@ -113,13 +117,19 @@ describe('resolveFieldMetadataStandardOverride', () => {
       };
 
       expect(
-        resolveFieldMetadataStandardOverride(fieldMetadata, 'label', 'fr-FR'),
+        resolveFieldMetadataStandardOverride(
+          fieldMetadata,
+          'label',
+          'fr-FR',
+          mockI18n,
+        ),
       ).toBe('Libellé traduit');
       expect(
         resolveFieldMetadataStandardOverride(
           fieldMetadata,
           'description',
           'fr-FR',
+          mockI18n,
         ),
       ).toBe('Description traduite');
     });
@@ -146,6 +156,7 @@ describe('resolveFieldMetadataStandardOverride', () => {
         fieldMetadata,
         'label',
         'fr-FR',
+        mockI18n,
       );
 
       expect(result).toBe('Standard Label');
@@ -173,6 +184,7 @@ describe('resolveFieldMetadataStandardOverride', () => {
         fieldMetadata,
         'description',
         'fr-FR',
+        mockI18n,
       );
 
       expect(result).toBe('Standard Description');
@@ -200,6 +212,7 @@ describe('resolveFieldMetadataStandardOverride', () => {
         fieldMetadata,
         'label',
         undefined,
+        mockI18n,
       );
 
       expect(result).toBe('Standard Label');
@@ -225,6 +238,7 @@ describe('resolveFieldMetadataStandardOverride', () => {
           fieldMetadata,
           'label',
           SOURCE_LOCALE,
+          mockI18n,
         ),
       ).toBe('Overridden Label');
       expect(
@@ -232,6 +246,7 @@ describe('resolveFieldMetadataStandardOverride', () => {
           fieldMetadata,
           'description',
           SOURCE_LOCALE,
+          mockI18n,
         ),
       ).toBe('Overridden Description');
       expect(
@@ -239,6 +254,7 @@ describe('resolveFieldMetadataStandardOverride', () => {
           fieldMetadata,
           'icon',
           SOURCE_LOCALE,
+          mockI18n,
         ),
       ).toBe('overridden-icon');
     });
@@ -261,6 +277,7 @@ describe('resolveFieldMetadataStandardOverride', () => {
         fieldMetadata,
         'label',
         'fr-FR',
+        mockI18n,
       );
 
       expect(result).toBe('Standard Label');
@@ -284,6 +301,7 @@ describe('resolveFieldMetadataStandardOverride', () => {
         fieldMetadata,
         'label',
         SOURCE_LOCALE,
+        mockI18n,
       );
 
       expect(result).toBe('Standard Label');
@@ -307,6 +325,7 @@ describe('resolveFieldMetadataStandardOverride', () => {
         fieldMetadata,
         'label',
         SOURCE_LOCALE,
+        mockI18n,
       );
 
       expect(result).toBe('Standard Label');
@@ -330,6 +349,7 @@ describe('resolveFieldMetadataStandardOverride', () => {
         fieldMetadata,
         'label',
         'fr-FR',
+        mockI18n,
       );
 
       expect(mockGenerateMessageId).toHaveBeenCalledWith('Standard Label');
@@ -355,6 +375,7 @@ describe('resolveFieldMetadataStandardOverride', () => {
         fieldMetadata,
         'label',
         'fr-FR',
+        mockI18n,
       );
 
       expect(result).toBe('Standard Label');
@@ -382,6 +403,7 @@ describe('resolveFieldMetadataStandardOverride', () => {
         fieldMetadata,
         'label',
         'fr-FR',
+        mockI18n,
       );
 
       expect(result).toBe('Translation Override');
@@ -404,6 +426,7 @@ describe('resolveFieldMetadataStandardOverride', () => {
         fieldMetadata,
         'label',
         SOURCE_LOCALE,
+        mockI18n,
       );
 
       expect(result).toBe('Source Override');
@@ -427,6 +450,7 @@ describe('resolveFieldMetadataStandardOverride', () => {
         fieldMetadata,
         'label',
         'de-DE',
+        mockI18n,
       );
 
       expect(result).toBe('Auto Translated Label');

packages/twenty-server/src/engine/metadata-modules/field-metadata/utils/resolve-field-metadata-standard-override.util.ts

@@ -1,4 +1,4 @@
-import { i18n } from '@lingui/core';
+import { I18n } from '@lingui/core';
 import { isNonEmptyString } from '@sniptt/guards';
 import { APP_LOCALES, SOURCE_LOCALE } from 'twenty-shared/translations';
 import { isDefined } from 'twenty-shared/utils';
@@ -13,6 +13,7 @@ export const resolveFieldMetadataStandardOverride = (
   >,
   labelKey: 'label' | 'description' | 'icon',
   locale: keyof typeof APP_LOCALES | undefined,
+  i18nInstance: I18n,
 ): string => {
   if (fieldMetadata.isCustom) {
     return fieldMetadata[labelKey] ?? '';
@@ -43,7 +44,8 @@ export const resolveFieldMetadataStandardOverride = (
   }
 
   const messageId = generateMessageId(fieldMetadata[labelKey] ?? '');
-  const translatedMessage = i18n._(messageId);
+
+  const translatedMessage = i18nInstance._(messageId);
 
   if (translatedMessage === messageId) {
     return fieldMetadata[labelKey] ?? '';