[pickers] Remove the hasLeadingZeros property from FieldSection

docs/data/migration/migration-pickers-v6/migration-pickers-v6.md

@@ -63,3 +63,28 @@ For example:
 
 The same applies to `slotProps` and `componentsProps`.
 :::
+
+## Field components
+
+### Replace the section `hasLeadingZeros` property
+
+:::success
+This only impacts you if you are using the `unstableFieldRef` prop to imperatively access the section object.
+:::
+
+The property `hasLeadingZeros` has been removed from the sections in favor of the more precise `hasLeadingZerosInFormat` and `hasLeadingZerosInInput` properties.
+To keep the same behavior, you can replace it by `hasLeadingZerosInFormat`
+
+```diff
+ const fieldRef = React.useRef<FieldRef<FieldSection>>(null);
+
+ React.useEffect(() => {
+     const firstSection = fieldRef.current!.getSections()[0]
+-    console.log(firstSection.hasLeadingZeros)
++    console.log(firstSection.hasLeadingZerosInFormat)
+ }, [])
+
+ return (
+   <DateField unstableFieldRef={fieldRef} />
+ );
+```

packages/x-date-pickers/src/internals/hooks/useField/useField.test.tsx

@@ -8,7 +8,6 @@ const COMMON_PROPERTIES = {
   type: 'year',
   modified: false,
   format: 'YYYY',
-  hasLeadingZeros: true,
   hasLeadingZerosInFormat: true,
   maxLength: 4,
 } as const;

packages/x-date-pickers/src/internals/hooks/useField/useField.utils.ts

@@ -558,7 +558,6 @@ export const splitFormatIntoSections = <TDate>(
       maxLength,
       value: sectionValue,
       placeholder: getSectionPlaceholder(utils, timezone, localeText, sectionConfig, token),
-      hasLeadingZeros: hasLeadingZerosInFormat,
       hasLeadingZerosInFormat,
       hasLeadingZerosInInput,
       startSeparator: sections.length === 0 ? startSeparator : '',

packages/x-date-pickers/src/models/fields.ts

@@ -44,12 +44,6 @@ export interface FieldSection {
    * Will determine if we should apply a digit-based editing or a letter-based editing.
    */
   contentType: FieldSectionContentType;
-  /**
-   * If `true`, the value of this section is supposed to have leading zeroes when parsed by the date library.
-   * For example, the value `1` should be rendered as "01" instead of "1".
-   * @deprecated Will be removed in v7, use `hasLeadingZerosInFormat` instead.
-   */
-  hasLeadingZeros: boolean;
   /**
    * If `true`, the value of this section is supposed to have leading zeroes when parsed by the date library.
    * For example, the value `1` should be rendered as "01" instead of "1".