Allow users to set where new fields must be created in a record page layout (#18420)

## Demo


https://github.com/user-attachments/assets/eaf89d0c-96e0-4e49-ac58-290c8e7403ff

packages/twenty-front/src/modules/localization/utils/__tests__/resolveDateFormat.test.ts

@@ -0,0 +1,30 @@
+import { DateFormat } from '@/localization/constants/DateFormat';
+import { resolveDateFormat } from '@/localization/utils/resolveDateFormat';
+
+jest.mock('@/localization/utils/detection/detectDateFormat', () => ({
+  detectDateFormat: jest.fn(() => 'DAY_FIRST'),
+}));
+
+describe('resolveDateFormat', () => {
+  it('should detect system format when SYSTEM is passed', () => {
+    const result = resolveDateFormat(DateFormat.SYSTEM);
+
+    expect(result).toBe(DateFormat.DAY_FIRST);
+  });
+
+  it('should return MONTH_FIRST as-is', () => {
+    expect(resolveDateFormat(DateFormat.MONTH_FIRST)).toBe(
+      DateFormat.MONTH_FIRST,
+    );
+  });
+
+  it('should return DAY_FIRST as-is', () => {
+    expect(resolveDateFormat(DateFormat.DAY_FIRST)).toBe(DateFormat.DAY_FIRST);
+  });
+
+  it('should return YEAR_FIRST as-is', () => {
+    expect(resolveDateFormat(DateFormat.YEAR_FIRST)).toBe(
+      DateFormat.YEAR_FIRST,
+    );
+  });
+});

packages/twenty-front/src/modules/localization/utils/__tests__/resolveTimeFormat.test.ts

@@ -0,0 +1,22 @@
+import { TimeFormat } from '@/localization/constants/TimeFormat';
+import { resolveTimeFormat } from '@/localization/utils/resolveTimeFormat';
+
+jest.mock('@/localization/utils/detection/detectTimeFormat', () => ({
+  detectTimeFormat: jest.fn(() => 'HOUR_24'),
+}));
+
+describe('resolveTimeFormat', () => {
+  it('should detect system format when SYSTEM is passed', () => {
+    const result = resolveTimeFormat(TimeFormat.SYSTEM);
+
+    expect(result).toBe(TimeFormat.HOUR_24);
+  });
+
+  it('should return HOUR_24 as-is', () => {
+    expect(resolveTimeFormat(TimeFormat.HOUR_24)).toBe(TimeFormat.HOUR_24);
+  });
+
+  it('should return HOUR_12 as-is', () => {
+    expect(resolveTimeFormat(TimeFormat.HOUR_12)).toBe(TimeFormat.HOUR_12);
+  });
+});