fix(project-management) : reflect saved task immediately in board, list and reopened modal

TaskModal now emits the fresh task returned by the API (same task:read
shape as the collection). The board, my-tasks and archives pages reinject
it into their local state and selectedTask before the background re-fetch,
so the list and a reopened modal no longer show the previous snapshot while
loadData() is still running.

frontend/modules/project-management/components/TaskModal.vue

@@ -569,7 +569,7 @@ const props = defineProps<{
 
 const emit = defineEmits<{
     (e: 'update:modelValue', value: boolean): void
-    (e: 'saved'): void
+    (e: 'saved', task?: Task): void
 }>()
 
 const isOpen = computed({
@@ -1042,7 +1042,7 @@ async function handleSubmit() {
             await removeRecurrence(props.task.recurrence.id)
         }
 
-        emit('saved')
+        emit('saved', savedTask)
         isOpen.value = false
     } finally {
         isSubmitting.value = false