Feat/multivalue limit (#14961)

## Summary
1. This change introduces the ability to limit how many values a
multi-value field can contain (for example: maximum number of emails,
phone numbers, links, or array items).
2. It centralizes the limit as a shared constant and type, validates
settings on the server, updates front-end types and components to
consume the setting, and adds a small settings UI so workspace admins
can change the limit per field.
3. Default behavior is preserved: if no max is configured, the existing
default (10) is used.


## **Fixes Issue:** [#14740
](https://github.com/twentyhq/twenty/issues/14740)

## Manual Test Screenshot
<img width="383" height="451" alt="Screenshot 2025-10-08 002413"
src="https://github.com/user-attachments/assets/a7704af6-10ef-4d10-b8c9-a9eeca03bfd9"
/>


### Values in fields


https://github.com/user-attachments/assets/7f59c4f7-3aca-4f83-8c04-3d44988316e3


Let me know if any changes are needed

---------

Co-authored-by: Félix Malfait <felix@twenty.com>
Co-authored-by: Félix Malfait <felix.malfait@gmail.com>

packages/twenty-server/src/engine/metadata-modules/field-metadata/interfaces/field-metadata-settings.interface.ts

@@ -1,5 +1,6 @@
 import {
   type AllowedAddressSubField,
+  type FieldMetadataMultiItemSettings,
   type FieldMetadataType,
   type IsExactly,
 } from 'twenty-shared/types';
@@ -62,6 +63,10 @@ type FieldMetadataSettingsMapping = {
   [FieldMetadataType.ADDRESS]: FieldMetadataAddressSettings | null;
   [FieldMetadataType.MORPH_RELATION]: FieldMetadataRelationSettings;
   [FieldMetadataType.TS_VECTOR]: FieldMetadataTsVectorSettings | null;
+  [FieldMetadataType.PHONES]: FieldMetadataMultiItemSettings | null;
+  [FieldMetadataType.EMAILS]: FieldMetadataMultiItemSettings | null;
+  [FieldMetadataType.LINKS]: FieldMetadataMultiItemSettings | null;
+  [FieldMetadataType.ARRAY]: FieldMetadataMultiItemSettings | null;
 };
 
 export type AllFieldMetadataSettings =

packages/twenty-server/src/engine/metadata-modules/field-metadata/services/field-metadata-validation.service.ts

@@ -12,6 +12,7 @@ import {
   type ValidationError,
   validateOrReject,
 } from 'class-validator';
+import { MULTI_ITEM_FIELD_MIN_MAX_VALUES } from 'twenty-shared/constants';
 import {
   ALLOWED_ADDRESS_SUBFIELDS,
   type AllowedAddressSubField,
@@ -72,6 +73,13 @@ class AddressSettingsValidation {
   @IsEnum(ALLOWED_ADDRESS_SUBFIELDS, { each: true })
   subFields?: AllowedAddressSubField[];
 }
+
+class MultipleValuesSettingsValidation {
+  @IsOptional()
+  @IsInt()
+  @Min(MULTI_ITEM_FIELD_MIN_MAX_VALUES)
+  maxNumberOfValues?: number;
+}
 @Injectable()
 export class FieldMetadataValidationService {
   constructor(
@@ -107,6 +115,16 @@ export class FieldMetadataValidationService {
           settings,
         });
         break;
+      case FieldMetadataType.PHONES:
+      case FieldMetadataType.EMAILS:
+      case FieldMetadataType.LINKS:
+      case FieldMetadataType.ARRAY:
+        await this.validateSettings({
+          type: fieldType,
+          validator: MultipleValuesSettingsValidation,
+          settings,
+        });
+        break;
       default:
         break;
     }

packages/twenty-server/src/engine/metadata-modules/field-metadata/types/field-metadata-entity-test.type.ts

@@ -1,5 +1,6 @@
 import { type Expect, type HasAllProperties } from 'twenty-shared/testing';
 import {
+  type FieldMetadataMultiItemSettings,
   type FieldMetadataType,
   type NullablePartial,
 } from 'twenty-shared/types';
@@ -133,10 +134,6 @@ type SettingsAssertions = [
   Expect<HasAllProperties<RawJsonFieldMetadata, NotDefinedSettings>>,
   Expect<HasAllProperties<RichTextFieldMetadata, NotDefinedSettings>>,
   Expect<HasAllProperties<ActorFieldMetadata, NotDefinedSettings>>,
-  Expect<HasAllProperties<ArrayFieldMetadata, NotDefinedSettings>>,
-  Expect<HasAllProperties<PhonesFieldMetadata, NotDefinedSettings>>,
-  Expect<HasAllProperties<EmailsFieldMetadata, NotDefinedSettings>>,
-  Expect<HasAllProperties<LinksFieldMetadata, NotDefinedSettings>>,
   Expect<HasAllProperties<UUIDFieldMetadata, NotDefinedSettings>>,
   Expect<HasAllProperties<BooleanFieldMetadata, NotDefinedSettings>>,
 
@@ -164,6 +161,30 @@ type SettingsAssertions = [
       { settings: FieldMetadataDateTimeSettings | null }
     >
   >,
+  Expect<
+    HasAllProperties<
+      ArrayFieldMetadata,
+      { settings: FieldMetadataMultiItemSettings | null }
+    >
+  >,
+  Expect<
+    HasAllProperties<
+      PhonesFieldMetadata,
+      { settings: FieldMetadataMultiItemSettings | null }
+    >
+  >,
+  Expect<
+    HasAllProperties<
+      EmailsFieldMetadata,
+      { settings: FieldMetadataMultiItemSettings | null }
+    >
+  >,
+  Expect<
+    HasAllProperties<
+      LinksFieldMetadata,
+      { settings: FieldMetadataMultiItemSettings | null }
+    >
+  >,
 
   Expect<
     HasAllProperties<