lmr: putting ma100 as default value in the speedlimittag selector

Signed-off-by: Mathieu <[email protected]>

front/src/applications/stdcm/consts.ts

@@ -20,3 +20,5 @@ export const COMPOSITION_CODES = [
   'MV160',
   'MVGV',
 ];
+
+export const DEFAULT_COMPOSITION_CODE = 'MA100';

front/src/common/SpeedLimitByTagSelector/SpeedLimitByTagSelector.tsx

@@ -1,11 +1,12 @@
-import { useMemo } from 'react';
+import { useEffect, useMemo } from 'react';
 
 import { Select } from '@osrd-project/ui-core';
 import cx from 'classnames';
 import { isEmpty } from 'lodash';
 import { useTranslation } from 'react-i18next';
 
 import { createStringSelectOptions } from 'utils/uiCoreHelpers';
+import { DEFAULT_COMPOSITION_CODE } from 'applications/stdcm/consts';
 
 type SpeedLimitByTagSelectorProps = {
   condensed?: boolean;
@@ -26,6 +27,12 @@ export default function SpeedLimitByTagSelector({
 }: SpeedLimitByTagSelectorProps) {
   const { t } = useTranslation(['operationalStudies/manageTrainSchedule']);
 
+  useEffect(() => {
+    if (!speedLimitByTag) {
+      dispatchUpdateSpeedLimitByTag(DEFAULT_COMPOSITION_CODE);
+    }
+  }, [speedLimitByTag, dispatchUpdateSpeedLimitByTag]);
+
   const speedLimitsTagsList = useMemo(
     () => (!isEmpty(speedLimitsByTags) ? speedLimitsByTags : []),
     [speedLimitsByTags]
@@ -46,9 +53,8 @@ export default function SpeedLimitByTagSelector({
         <Select
           disabled={disabled}
           id="speed-limit-by-tag-selector"
-          value={speedLimitByTag || ''}
+          value={speedLimitByTag || DEFAULT_COMPOSITION_CODE}
           label={t('speedLimitByTagAbbrev')}
-          placeholder={t('noSpeedLimitByTag')}
           onChange={(e) => {
             if (e) {
               dispatchUpdateSpeedLimitByTag(e);