fix : corrections de tous les retours + modification de la seed et fixtures

frontend/pages/shipment/[[id]].vue

@@ -1,6 +1,6 @@
 <template>
     <div>
-        <div class="flex justify-between h-[52px] mt-16 mb-[80px]">
+        <div class="flex justify-between h-[52px] mb-[80px]">
             <div class="flex flex-1 mr-16">
                 <UiStepper
                     :labels="SHIPMENT_STEP_LABELS"
@@ -9,12 +9,12 @@
 
                 />
             </div>
-            <button
+            <UiButton
                 type="button"
                 class="flex flex-col justify-center uppercase text-xl bg-black text-white h-[50px] w-[272px] text-center"
                 @click="saveAndHold"
             >Mettre en attente
-            </button>
+            </UiButton>
         </div>
         <ShipmentForm v-if="!storeShipment || storeShipment.currentStep === 0" ref="shipmentFormRef"/>
         <ShipmentWeight v-if="storeShipment?.currentStep === 1" mode="gross"/>