refactor(reminders): make Reminders.vue take ITaskReminder[] directly

Reminders.vue only read three task fields (dueDate/startDate/endDate)
and wrote one back (reminders). The ITask coupling was accidental.

Flip the prop to ITaskReminder[] and pass defaultRelativeTo / allowAbsolute
as plain props. TaskDetailView now owns the due/start/end priority
computation and binds v-model="task.reminders" directly. This also lets
the settings page reuse Reminders.vue for configuring default reminders.

frontend/src/components/tasks/partials/Reminders.vue

@@ -3,7 +3,7 @@
 		<div
 			v-for="(r, index) in reminders"
 			:key="index"
-			:data-is-overdue="r.reminder < now || undefined"
+			:data-is-overdue="r.reminder && r.reminder < now || undefined"
 			class="reminder-input"
 		>
 			<ReminderDetail
@@ -11,6 +11,7 @@
 				class="reminder-detail"
 				:disabled="disabled"
 				:default-relative-to="defaultRelativeTo"
+				:allow-absolute="allowAbsolute"
 				@update:modelValue="updateData"
 			/>
 			<BaseButton
@@ -26,31 +27,36 @@
 			:disabled="disabled"
 			:clear-after-update="true"
 			:default-relative-to="defaultRelativeTo"
+			:allow-absolute="allowAbsolute"
 			@update:modelValue="addNewReminder"
 		/>
 	</div>
 </template>
 
 <script setup lang="ts">
-import {ref, watch, computed} from 'vue'
+import {ref, watch} from 'vue'
 
 import type {ITaskReminder} from '@/modelTypes/ITaskReminder'
+import type {IReminderPeriodRelativeTo} from '@/types/IReminderPeriodRelativeTo'
 
 import BaseButton from '@/components/base/BaseButton.vue'
 import ReminderDetail from '@/components/tasks/partials/ReminderDetail.vue'
-import type {ITask} from '@/modelTypes/ITask'
-import {REMINDER_PERIOD_RELATIVE_TO_TYPES} from '@/types/IReminderPeriodRelativeTo'
-import { useNow } from '@vueuse/core'
+import {useNow} from '@vueuse/core'
 
 const props = withDefaults(defineProps<{
-	modelValue: ITask,
+	modelValue?: ITaskReminder[],
+	defaultRelativeTo?: IReminderPeriodRelativeTo | null,
 	disabled?: boolean,
+	allowAbsolute?: boolean,
 }>(), {
+	modelValue: () => [],
+	defaultRelativeTo: null,
 	disabled: false,
+	allowAbsolute: true,
 })
 
 const emit = defineEmits<{
-	'update:modelValue': [ITask]
+	'update:modelValue': [ITaskReminder[]]
 }>()
 
 const reminders = ref<ITaskReminder[]>([])
@@ -58,38 +64,15 @@ const reminders = ref<ITaskReminder[]>([])
 const now = useNow({interval: 1000})
 
 watch(
-	() => props.modelValue.reminders,
+	() => props.modelValue,
 	(newVal) => {
-		reminders.value = newVal
+		reminders.value = [...(newVal ?? [])]
 	},
 	{immediate: true, deep: true}, // deep watcher so that we get the resolved date after updating the task
 )
 
-const defaultRelativeTo = computed(() => {
-	if (typeof props.modelValue === 'undefined') {
-		return null
-	}
-	
-	if (props.modelValue?.dueDate) {
-		return REMINDER_PERIOD_RELATIVE_TO_TYPES.DUEDATE
-	}
-	
-	if (props.modelValue.dueDate === null && props.modelValue.startDate !== null) {
-		return REMINDER_PERIOD_RELATIVE_TO_TYPES.STARTDATE
-	}
-	
-	if (props.modelValue.dueDate === null && props.modelValue.startDate === null && props.modelValue.endDate !== null) {
-		return REMINDER_PERIOD_RELATIVE_TO_TYPES.ENDDATE
-	}
-	
-	return null
-})
-
 function updateData() {
-	emit('update:modelValue', {
-		...props.modelValue,
-		reminders: reminders.value,
-	})
+	emit('update:modelValue', [...reminders.value])
 }
 
 function addNewReminder(newReminder: ITaskReminder|null) {

frontend/src/views/tasks/TaskDetailView.vue

@@ -250,7 +250,8 @@
 								</div>
 								<Reminders
 									:ref="e => setFieldRef('reminders', e)"
-									v-model="task"
+									v-model="task.reminders"
+									:default-relative-to="remindersDefaultRelativeTo"
 									:disabled="!canWrite"
 									@update:modelValue="saveTask()"
 								/>
@@ -672,6 +673,7 @@ import {getProjectTitle} from '@/helpers/getProjectTitle'
 import {isAppleDevice} from '@/helpers/isAppleDevice'
 import {scrollIntoView} from '@/helpers/scrollIntoView'
 import {TASK_REPEAT_MODES} from '@/types/IRepeatMode'
+import {REMINDER_PERIOD_RELATIVE_TO_TYPES} from '@/types/IReminderPeriodRelativeTo'
 import {playPopSound} from '@/helpers/playPop'
 
 import {useTaskStore} from '@/stores/tasks'
@@ -707,6 +709,18 @@ const baseStore = useBaseStore()
 
 const task = ref<ITask>(new TaskModel())
 const hasAttachments = computed(() => (task.value.attachments?.length ?? 0) > 0)
+const remindersDefaultRelativeTo = computed(() => {
+	if (task.value.dueDate) {
+		return REMINDER_PERIOD_RELATIVE_TO_TYPES.DUEDATE
+	}
+	if (task.value.startDate) {
+		return REMINDER_PERIOD_RELATIVE_TO_TYPES.STARTDATE
+	}
+	if (task.value.endDate) {
+		return REMINDER_PERIOD_RELATIVE_TO_TYPES.ENDDATE
+	}
+	return null
+})
 const taskNotFound = ref(false)
 const taskTitle = computed(() => task.value.title)
 useTitle(taskTitle)