src/components/CalendarHeader.vue

@@ -12,10 +12,10 @@ const props = defineProps({
 
 const calendarStore = useCalendarStore()
 
-// Emits: year-change -> { year, scrollTop }
+// Emits year-change events
 const emit = defineEmits(['year-change'])
 
-const baseDate = new Date(1970, 0, 4 + calendarStore.config.first_day)
+const baseDate = computed(() => new Date(1970, 0, 4 + calendarStore.config.first_day))
 const WEEK_MS = 7 * 24 * 60 * 60 * 1000
 
 const topVirtualWeek = computed(() => {
@@ -24,9 +24,9 @@ const topVirtualWeek = computed(() => {
 })
 
 const currentYear = computed(() => {
-  const weekStart = new Date(baseDate)
+  const weekStart = new Date(baseDate.value)
   weekStart.setDate(weekStart.getDate() + topVirtualWeek.value * 7)
-  // ISO anchor: Thursday of current calendar week
+  // ISO anchor Thursday
   const anchor = new Date(weekStart)
   anchor.setDate(anchor.getDate() + ((4 - anchor.getDay() + 7) % 7))
   return isoWeekInfo(anchor).year
@@ -36,11 +36,10 @@ function virtualWeekOf(d) {
   const o = (d.getDay() - calendarStore.config.first_day + 7) % 7
   const fd = new Date(d)
   fd.setDate(d.getDate() - o)
-  return Math.floor((fd - baseDate) / WEEK_MS)
+  return Math.floor((fd - baseDate.value) / WEEK_MS)
 }
 
 function isoWeekMonday(isoYear, isoWeek) {
-  // Monday of ISO week 1
   const jan4 = new Date(isoYear, 0, 4)
   const week1Mon = new Date(jan4)
   week1Mon.setDate(week1Mon.getDate() - ((week1Mon.getDay() + 6) % 7))
@@ -54,16 +53,16 @@ function changeYear(y) {
   y = Math.round(Math.max(calendarStore.minYear, Math.min(calendarStore.maxYear, y)))
   if (y === currentYear.value) return
   const vw = topVirtualWeek.value
-  // Fraction within current row for smooth vertical position preservation
+  // Fraction within current row
   const weekStartScroll = (vw - props.minVirtualWeek) * props.rowHeight
   const frac = Math.max(0, Math.min(1, (props.scrollTop - weekStartScroll) / props.rowHeight))
-  // Derive current ISO week via anchor Thursday
-  const curCalWeekStart = new Date(baseDate)
+  // Anchor Thursday of current calendar week
+  const curCalWeekStart = new Date(baseDate.value)
   curCalWeekStart.setDate(curCalWeekStart.getDate() + vw * 7)
   const curAnchorThu = new Date(curCalWeekStart)
   curAnchorThu.setDate(curAnchorThu.getDate() + ((4 - curAnchorThu.getDay() + 7) % 7))
   let { week: isoW } = isoWeekInfo(curAnchorThu)
-  // Build Monday of that ISO week in target year; fallback if week absent (53)
+  // Build Monday of ISO week
   let weekMon = isoWeekMonday(y, isoW)
   if (isoWeekInfo(weekMon).year !== y) {
     isoW--
@@ -80,7 +79,7 @@ function changeYear(y) {
 }
 
 const weekdayNames = computed(() => {
-  // Get Monday-first names, then reorder by first day, then add weekend info
+  // Reorder names & weekend flags
   const mondayFirstNames = getLocalizedWeekdayNames()
   const sundayFirstNames = [mondayFirstNames[6], ...mondayFirstNames.slice(0, 6)]
   const reorderedNames = reorderByFirstDay(sundayFirstNames, calendarStore.config.first_day)

src/components/CalendarView.vue

@@ -1,5 +1,5 @@
 <script setup>
-import { ref, onMounted, onBeforeUnmount, computed } from 'vue'
+import { ref, onMounted, onBeforeUnmount, computed, watch } from 'vue'
 import { useCalendarStore } from '@/stores/CalendarStore'
 import CalendarHeader from '@/components/CalendarHeader.vue'
 import CalendarWeek from '@/components/CalendarWeek.vue'
@@ -39,7 +39,7 @@ function createEventFromSelection() {
 const scrollTop = ref(0)
 const viewportHeight = ref(600)
 const rowHeight = ref(64)
-const baseDate = new Date(1970, 0, 4 + calendarStore.config.first_day)
+const baseDate = computed(() => new Date(1970, 0, 4 + calendarStore.config.first_day))
 
 const selection = ref({ startDate: null, dayCount: 0 })
 const isDragging = ref(false)
@@ -52,7 +52,7 @@ const minVirtualWeek = computed(() => {
   const firstDayOfWeek = new Date(date)
   const dayOffset = (date.getDay() - calendarStore.config.first_day + 7) % 7
   firstDayOfWeek.setDate(date.getDate() - dayOffset)
-  return Math.floor((firstDayOfWeek - baseDate) / WEEK_MS)
+  return Math.floor((firstDayOfWeek - baseDate.value) / WEEK_MS)
 })
 
 const maxVirtualWeek = computed(() => {
@@ -60,7 +60,7 @@ const maxVirtualWeek = computed(() => {
   const firstDayOfWeek = new Date(date)
   const dayOffset = (date.getDay() - calendarStore.config.first_day + 7) % 7
   firstDayOfWeek.setDate(date.getDate() - dayOffset)
-  return Math.floor((firstDayOfWeek - baseDate) / WEEK_MS)
+  return Math.floor((firstDayOfWeek - baseDate.value) / WEEK_MS)
 })
 
 const totalVirtualWeeks = computed(() => {
@@ -126,18 +126,17 @@ function getWeekIndex(date) {
   const firstDayOfWeek = new Date(date)
   const dayOffset = (date.getDay() - calendarStore.config.first_day + 7) % 7
   firstDayOfWeek.setDate(date.getDate() - dayOffset)
-  return Math.floor((firstDayOfWeek - baseDate) / WEEK_MS)
+  return Math.floor((firstDayOfWeek - baseDate.value) / WEEK_MS)
 }
 
 function getFirstDayForVirtualWeek(virtualWeek) {
-  const firstDay = new Date(baseDate)
+  const firstDay = new Date(baseDate.value)
   firstDay.setDate(firstDay.getDate() + virtualWeek * 7)
   return firstDay
 }
 
 function createWeek(virtualWeek) {
   const firstDay = getFirstDayForVirtualWeek(virtualWeek)
-  // ISO week number should be based on the Thursday of this week (anchor) to avoid off-by-one when week starts Sunday or other days
   const isoAnchor = new Date(firstDay)
   isoAnchor.setDate(isoAnchor.getDate() + ((4 - isoAnchor.getDay() + 7) % 7))
   const weekNumber = isoWeekInfo(isoAnchor).week
@@ -147,7 +146,7 @@ function createWeek(virtualWeek) {
   let monthToLabel = null
   let labelYear = null
 
-  // Precollect unique repeating base events once (avoid nested loops for each day)
+  // Collect repeating base events once
   const repeatingBases = []
   if (calendarStore.events) {
     for (const ev of calendarStore.events.values()) {
@@ -168,10 +167,10 @@ function createWeek(virtualWeek) {
     // Build day events starting with stored (base/spanning) then virtual occurrences
     const dayEvents = [...storedEvents]
     for (const base of repeatingBases) {
-      // Skip if the base itself already on this date (already in storedEvents)
+      // Skip if base spans this date
       if (dateStr >= base.startDate && dateStr <= base.endDate) continue
 
-      // Check if any occurrence of this repeating event spans through this date
+      // Check if any virtual occurrence spans this date
       const baseStart = fromLocalString(base.startDate)
       const baseEnd = fromLocalString(base.endDate)
       const spanDays = Math.max(0, Math.round((baseEnd - baseStart) / (24 * 60 * 60 * 1000)))
@@ -179,7 +178,7 @@ function createWeek(virtualWeek) {
 
       let occurrenceFound = false
 
-      // Check dates going backwards to find an occurrence that might span to this date
+      // Walk backwards within span to find occurrence start
       for (let offset = 0; offset <= spanDays && !occurrenceFound; offset++) {
         const candidateStart = new Date(currentDate)
         candidateStart.setDate(candidateStart.getDate() - offset)
@@ -430,6 +429,20 @@ const handleHeaderYearChange = ({ scrollTop: st }) => {
 function openSettings() {
   settingsDialog.value?.open()
 }
+// Preserve approximate top visible date when first_day changes
+watch(
+  () => calendarStore.config.first_day,
+  () => {
+    const currentTopVW = Math.floor(scrollTop.value / rowHeight.value) + minVirtualWeek.value
+    const currentTopDate = getFirstDayForVirtualWeek(currentTopVW)
+    requestAnimationFrame(() => {
+      const newTopWeekIndex = getWeekIndex(currentTopDate)
+      const newScroll = (newTopWeekIndex - minVirtualWeek.value) * rowHeight.value
+      scrollTop.value = newScroll
+      if (viewport.value) viewport.value.scrollTop = newScroll
+    })
+  },
+)
 </script>
 
 <template>

src/components/SettingsDialog.vue

@@ -1,33 +1,28 @@
 <script setup>
-import { ref, watch } from 'vue'
+import { ref, computed } from 'vue'
 import BaseDialog from './BaseDialog.vue'
 import { useCalendarStore } from '@/stores/CalendarStore'
+import WeekdaySelector from './WeekdaySelector.vue'
 
 const show = ref(false)
 const calendarStore = useCalendarStore()
 
-// Local copies for editing
-const firstDay = ref(calendarStore.config.first_day)
-const weekend = ref([...calendarStore.weekend])
+// Reactive bindings to store
+const firstDay = computed({
+  get: () => calendarStore.config.first_day,
+  set: (v) => (calendarStore.config.first_day = v),
+})
+const weekend = computed({
+  get: () => calendarStore.weekend,
+  set: (v) => (calendarStore.weekend = [...v]),
+})
 
 function open() {
-  firstDay.value = calendarStore.config.first_day
-  weekend.value = [...calendarStore.weekend]
   show.value = true
 }
 function close() {
   show.value = false
 }
-function save() {
-  calendarStore.config.first_day = firstDay.value
-  calendarStore.weekend = [...weekend.value]
-  show.value = false
-}
-
-function toggleWeekend(idx) {
-  weekend.value[idx] = !weekend.value[idx]
-}
-
 defineExpose({ open })
 </script>
 
@@ -48,23 +43,12 @@ defineExpose({ open })
       </label>
       <div class="weekend-select ec-field">
         <span>Weekend days</span>
-        <div class="weekday-pills">
-          <button
-            v-for="(isW, i) in weekend"
-            :key="i"
-            type="button"
-            @click="toggleWeekend(i)"
-            :class="['pill', { active: isW }]"
-          >
-            {{ ['Su', 'Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa'][i] }}
-          </button>
-        </div>
+        <WeekdaySelector v-model="weekend" :first-day="firstDay" />
       </div>
     </div>
     <template #footer>
       <div class="footer-row">
-        <button type="button" class="ec-btn" @click="close">Cancel</button>
-        <button type="button" class="ec-btn save-btn" @click="save">Save</button>
+        <button type="button" class="ec-btn close-btn" @click="close">Close</button>
       </div>
     </template>
   </BaseDialog>
@@ -90,26 +74,7 @@ select {
   padding: 0.4rem 0.5rem;
   border-radius: 0.4rem;
 }
-.weekday-pills {
-  display: flex;
-  gap: 0.35rem;
-  flex-wrap: wrap;
-}
-.pill {
-  border: 1px solid var(--muted);
-  background: var(--panel-alt, transparent);
-  color: var(--ink);
-  padding: 0.35rem 0.6rem;
-  border-radius: 0.5rem;
-  font-size: 0.7rem;
-  cursor: pointer;
-}
-.pill.active {
-  background: var(--today);
-  color: #000;
-  border-color: var(--today);
-  font-weight: 600;
-}
+/* WeekdaySelector display tweaks */
 .footer-row {
   display: flex;
   justify-content: flex-end;
@@ -124,10 +89,25 @@ select {
   border-radius: 0.4rem;
   cursor: pointer;
 }
-.ec-btn.save-btn {
-  background: var(--today);
-  color: #000;
-  border-color: transparent;
+.ec-btn.close-btn {
+  background: var(--panel-alt);
+  border-color: var(--muted);
   font-weight: 500;
 }
+
+/* Adjust WeekdaySelector size inside settings */
+::v-deep(.weekgrid) {
+  margin-top: 0.25rem;
+}
+::v-deep(.day) {
+  font-size: 0.6rem;
+  padding: 0.45rem 0.25rem;
+}
+::v-deep(.workday-weekend div.workday) {
+  background: var(--muted);
+}
+::v-deep(.workday-weekend div.weekend) {
+  background: var(--strong);
+}
 </style>
+<!-- settings dialog -->