feat: scrolling month calendar, green theme fixes, long-press create, event colors

- Month view rewritten as a continuous vertical scroll (iOS-style): no
  prev/next buttons, compact fixed-height week rows, month label on the 1st,
  top-bar title follows the visible month, Today scrolls back to today
- Long-press a day opens the event editor pre-filled with that date
- Theme: green container/tint colors so the FAB and accents are no longer the
  Material default purple
- Event colors: parse #RGB shorthand, and fall back to a stable per-calendar
  palette colour instead of a constant blue when the server omits a colour
- Top bar hides prev/next arrows in month view (scroll instead)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/src/main/java/com/scarriffle/calendarr/domain/model/CalEvent.kt

@@ -23,10 +23,26 @@ data class CalEvent(
     val calendarColor: String,
     val source: String,
 ) {
-    /** Per-event override colour, falling back to the calendar's colour. */
+    /**
-    val effectiveColor: String get() = color?.takeIf { it.isNotBlank() } ?: calendarColor
+     * Per-event override colour, then the calendar's colour, then a stable
+     * per-calendar palette colour (so events never collapse to one default).
+     */
+    val effectiveColor: String
+        get() = color?.takeIf { it.isNotBlank() }
+            ?: calendarColor.takeIf { it.isNotBlank() }
+            ?: fallbackColorFor("$source:$calendarId")
 
     companion object {
+        private val FALLBACK_PALETTE = listOf(
+            "#34a853", "#4285f4", "#ea4335", "#fbbc05",
+            "#46bdc6", "#9c27b0", "#ff7043", "#7090c0",
+        )
+
+        private fun fallbackColorFor(key: String): String {
+            val idx = (key.hashCode().and(Int.MAX_VALUE)) % FALLBACK_PALETTE.size
+            return FALLBACK_PALETTE[idx]
+        }
+
         /** Parse one event object from the `/api/caldav/events` aggregate response. */
         fun fromJson(json: JSONObject): CalEvent? {
             val title = json.optString("title").takeIf { json.has("title") } ?: return null
@@ -63,7 +79,7 @@ data class CalEvent(
                 color = colorRaw.takeIf { it.isNotBlank() },
                 calendarId = calendarId,
                 calendarName = json.optString("calendar_name", ""),
-                calendarColor = json.optString("calendarColor", "#4285f4"),
+                calendarColor = json.optString("calendarColor", ""),
                 source = json.optString("source", "local"),
             )
         }

app/src/main/java/com/scarriffle/calendarr/ui/calendar/CalendarScreen.kt

@@ -25,9 +25,11 @@ import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
 import androidx.compose.material3.TopAppBar
+import androidx.compose.foundation.lazy.rememberLazyListState
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
@@ -72,15 +74,19 @@ fun CalendarScreen(
     var editor by remember { mutableStateOf<EditorRequest?>(null) }
     var overlay by remember { mutableStateOf(Overlay.NONE) }
 
+    // Continuous month scrolling
+    val monthListState = rememberLazyListState()
+    var todaySignal by remember { mutableIntStateOf(0) }
+    var visibleMonth by remember { mutableStateOf(state.currentDate) }
+    val isMonth = state.viewType == CalViewType.MONTH
+    val barTitle = if (isMonth) titleForView(CalViewType.MONTH, visibleMonth, lang)
+        else titleForView(state.viewType, state.currentDate, lang)
+
     Scaffold(
         topBar = {
             TopAppBar(
                 title = {
-                    Text(
+                    Text(barTitle, maxLines = 1, overflow = TextOverflow.Ellipsis)
-                        titleForView(state.viewType, state.currentDate, lang),
-                        maxLines = 1,
-                        overflow = TextOverflow.Ellipsis,
-                    )
                 },
                 navigationIcon = {
                     IconButton(onClick = { showMenu = true }) {
@@ -88,15 +94,19 @@ fun CalendarScreen(
                     }
                 },
                 actions = {
+                    if (!isMonth) {
                         IconButton(onClick = vm::navigatePrev) {
                             Icon(Icons.Filled.ChevronLeft, contentDescription = null)
                         }
-                    IconButton(onClick = vm::moveToToday) {
+                    }
+                    IconButton(onClick = { if (isMonth) todaySignal++ else vm.moveToToday() }) {
                         Icon(Icons.Filled.Today, contentDescription = tr("nav.today"))
                     }
+                    if (!isMonth) {
                         IconButton(onClick = vm::navigateNext) {
                             Icon(Icons.Filled.ChevronRight, contentDescription = null)
                         }
+                    }
                     IconButton(onClick = { showFilter = true }) {
                         Icon(Icons.Filled.FilterList, contentDescription = tr("filter.button"))
                     }
@@ -121,7 +131,11 @@ fun CalendarScreen(
             )
         },
         floatingActionButton = {
-            FloatingActionButton(onClick = { editor = EditorRequest(null, state.currentDate) }) {
+            FloatingActionButton(
+                onClick = { editor = EditorRequest(null, if (isMonth) visibleMonth else state.currentDate) },
+                containerColor = MaterialTheme.colorScheme.primary,
+                contentColor = MaterialTheme.colorScheme.onPrimary,
+            ) {
                 Icon(Icons.Filled.Add, contentDescription = tr("cal.new_event"))
             }
         },
@@ -137,9 +151,12 @@ fun CalendarScreen(
                 CalendarBody(
                     state = state,
                     vm = vm,
+                    monthListState = monthListState,
+                    scrollToTodaySignal = todaySignal,
+                    onVisibleMonthChange = { visibleMonth = it },
                     onEventClick = { detailEvent = it },
                     onDayClick = { date -> vm.goToDate(date, CalViewType.DAY) },
-                    onEmptySlotClick = { date -> editor = EditorRequest(null, date) },
+                    onDayLongPress = { date -> editor = EditorRequest(null, date) },
                 )
             }
         }
@@ -215,12 +232,24 @@ fun CalendarScreen(
 private fun CalendarBody(
     state: CalendarUiState,
     vm: CalendarViewModel,
+    monthListState: androidx.compose.foundation.lazy.LazyListState,
+    scrollToTodaySignal: Int,
+    onVisibleMonthChange: (LocalDate) -> Unit,
     onEventClick: (CalEvent) -> Unit,
     onDayClick: (LocalDate) -> Unit,
-    onEmptySlotClick: (LocalDate) -> Unit,
+    onDayLongPress: (LocalDate) -> Unit,
 ) {
     when (state.viewType) {
-        CalViewType.MONTH -> MonthView(state, vm, onDayClick, onEventClick)
+        CalViewType.MONTH -> MonthView(
+            state = state,
+            vm = vm,
+            listState = monthListState,
+            scrollToTodaySignal = scrollToTodaySignal,
+            onVisibleMonthChange = onVisibleMonthChange,
+            onDayClick = onDayClick,
+            onDayLongPress = onDayLongPress,
+            onEventClick = onEventClick,
+        )
         CalViewType.WEEK -> WeekView(state, vm, onEventClick)
         CalViewType.DAY -> DayView(state, vm, onEventClick)
         CalViewType.QUARTER -> QuarterView(state, onDayClick)

app/src/main/java/com/scarriffle/calendarr/ui/calendar/CalendarViewModel.kt

@@ -159,6 +159,21 @@ class CalendarViewModel @Inject constructor(
         }
     }
 
+    /** On-demand load for a month the user scrolled to in the continuous calendar. */
+    fun ensureMonthLoaded(monthAnchor: LocalDate) {
+        val first = monthAnchor.withDayOfMonth(1)
+        val start = instant(first.minusMonths(1))
+        val end = instant(first.plusMonths(2))
+        if (isCached(start, end)) return
+        viewModelScope.launch {
+            _state.update { it.copy(isLoading = true) }
+            runCatching { repository.fetchEvents(start, end) }
+                .onSuccess { mergeIntoCache(it, start, end); refreshFromCache() }
+                .onFailure { e -> _state.update { it.copy(error = e.message) } }
+            _state.update { it.copy(isLoading = false) }
+        }
+    }
+
     private fun prefetchBackground() {
         val months = settingsStore.cacheMonths
         val today = LocalDate.now().withDayOfMonth(1)

app/src/main/java/com/scarriffle/calendarr/ui/calendar/MonthView.kt

@@ -1,7 +1,9 @@
 package com.scarriffle.calendarr.ui.calendar
 
+import androidx.compose.foundation.ExperimentalFoundationApi
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
+import androidx.compose.foundation.combinedClickable
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -10,15 +12,23 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.LazyListState
+import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.Divider
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.snapshotFlow
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
-import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
@@ -28,111 +38,183 @@ import com.scarriffle.calendarr.ui.LocalLang
 import com.scarriffle.calendarr.util.colorFromHex
 import com.scarriffle.calendarr.util.contrastingTextColor
 import java.time.LocalDate
-import java.time.temporal.IsoFields
+import java.time.format.TextStyle
+import java.time.temporal.ChronoUnit
 
+private const val MONTHS_BACK = 18L
+private const val MONTHS_AHEAD = 18L
+
+/**
+ * Continuous, vertically scrolling month calendar (matches the iOS app).
+ * There are no prev/next buttons — the user scrolls through weeks and the
+ * top-bar title follows the currently visible month.
+ */
 @Composable
 fun MonthView(
     state: CalendarUiState,
     vm: CalendarViewModel,
+    listState: LazyListState,
+    scrollToTodaySignal: Int,
+    onVisibleMonthChange: (LocalDate) -> Unit,
     onDayClick: (LocalDate) -> Unit,
+    onDayLongPress: (LocalDate) -> Unit,
     onEventClick: (CalEvent) -> Unit,
 ) {
     val lang = LocalLang.current
     val mondayFirst = state.weekStartsOnMonday
     val today = LocalDate.now()
-    val firstOfMonth = state.currentDate.withDayOfMonth(1)
+
-    val firstVisible = startOfWeekFor(firstOfMonth, mondayFirst)
+    val firstVisible = remember(mondayFirst) {
-    val weeks = (0 until 6).map { w -> (0 until 7).map { d -> firstVisible.plusDays((w * 7 + d).toLong()) } }
+        startOfWeek(today.withDayOfMonth(1).minusMonths(MONTHS_BACK), mondayFirst)
+    }
+    val end = remember(mondayFirst) {
+        startOfWeek(today.withDayOfMonth(1).plusMonths(MONTHS_AHEAD), mondayFirst)
+    }
+    val weekCount = remember(firstVisible, end) {
+        (ChronoUnit.WEEKS.between(firstVisible, end).toInt() + 1).coerceAtLeast(1)
+    }
+    val todayIndex = remember(firstVisible) {
+        ChronoUnit.WEEKS.between(firstVisible, startOfWeek(today, mondayFirst)).toInt()
+    }
+
+    // Initial scroll to today's week.
+    LaunchedEffect(Unit) {
+        listState.scrollToItem((todayIndex - 1).coerceAtLeast(0))
+    }
+    // "Today" button.
+    LaunchedEffect(scrollToTodaySignal) {
+        if (scrollToTodaySignal > 0) listState.animateScrollToItem((todayIndex - 1).coerceAtLeast(0))
+    }
+    // Track visible month + trigger on-demand loads.
+    LaunchedEffect(listState, weekCount) {
+        snapshotFlow { listState.firstVisibleItemIndex }.collect { idx ->
+            val weekStart = firstVisible.plusWeeks(idx.toLong())
+            val month = weekStart.plusDays(3) // mid-week → representative month
+            onVisibleMonthChange(month)
+            vm.ensureMonthLoaded(month)
+        }
+    }
 
     Column(Modifier.fillMaxSize()) {
-        // Header: CW + weekdays
+        // Fixed weekday header
-        Row(Modifier.fillMaxWidth().padding(vertical = 4.dp)) {
+        Row(Modifier.fillMaxWidth().padding(vertical = 2.dp)) {
-            Box(Modifier.width(28.dp))
             weekdayLabels(mondayFirst, lang).forEach { label ->
                 Text(
                     label,
                     modifier = Modifier.weight(1f),
-                    textAlign = androidx.compose.ui.text.style.TextAlign.Center,
+                    textAlign = TextAlign.Center,
                     style = MaterialTheme.typography.labelSmall,
                     color = MaterialTheme.colorScheme.onSurfaceVariant,
                 )
             }
         }
-        weeks.forEach { week ->
+        Divider(color = MaterialTheme.colorScheme.outline.copy(alpha = 0.4f))
-            Row(Modifier.fillMaxWidth().weight(1f)) {
+
-                val cw = week.first().get(IsoFields.WEEK_OF_WEEK_BASED_YEAR)
+        LazyColumn(state = listState, modifier = Modifier.fillMaxSize()) {
-                Box(Modifier.width(28.dp).fillMaxSize(), contentAlignment = Alignment.TopCenter) {
+            items(weekCount) { index ->
-                    Text(
+                val weekStart = firstVisible.plusWeeks(index.toLong())
-                        "$cw",
+                WeekRow(
-                        style = MaterialTheme.typography.labelSmall,
+                    weekStart = weekStart,
-                        color = MaterialTheme.colorScheme.outline,
+                    today = today,
-                        fontSize = 9.sp,
+                    events = state.events,
-                        modifier = Modifier.padding(top = 4.dp),
+                    vm = vm,
+                    lang = lang,
+                    onDayClick = onDayClick,
+                    onDayLongPress = onDayLongPress,
+                    onEventClick = onEventClick,
                 )
             }
-                week.forEach { day ->
+        }
+    }
+}
+
+@OptIn(ExperimentalFoundationApi::class)
+@Composable
+private fun WeekRow(
+    weekStart: LocalDate,
+    today: LocalDate,
+    events: List<CalEvent>,
+    vm: CalendarViewModel,
+    lang: String,
+    onDayClick: (LocalDate) -> Unit,
+    onDayLongPress: (LocalDate) -> Unit,
+    onEventClick: (CalEvent) -> Unit,
+) {
+    val days = (0 until 7).map { weekStart.plusDays(it.toLong()) }
+    Row(
+        Modifier
+            .fillMaxWidth()
+            .height(78.dp),
+    ) {
+        days.forEach { day ->
             DayCell(
                 day = day,
-                        inMonth = day.month == firstOfMonth.month,
                 isToday = day == today,
-                        events = vm.eventsOn(day, state.events),
+                events = vm.eventsOn(day, events),
+                lang = lang,
                 onClick = { onDayClick(day) },
+                onLongClick = { onDayLongPress(day) },
                 onEventClick = onEventClick,
                 modifier = Modifier.weight(1f).fillMaxSize(),
             )
         }
     }
-        }
+    Divider(color = MaterialTheme.colorScheme.outline.copy(alpha = 0.2f))
-    }
 }
 
+@OptIn(ExperimentalFoundationApi::class)
 @Composable
 private fun DayCell(
     day: LocalDate,
-    inMonth: Boolean,
     isToday: Boolean,
     events: List<CalEvent>,
+    lang: String,
     onClick: () -> Unit,
+    onLongClick: () -> Unit,
     onEventClick: (CalEvent) -> Unit,
     modifier: Modifier = Modifier,
 ) {
-    val todayColor = colorFromHex(LocalAppSettings.current.todayColor)
+    val settings = LocalAppSettings.current
+    val todayColor = colorFromHex(settings.todayColor)
+    val monthLabelColor = colorFromHex(settings.monthLabelColor, MaterialTheme.colorScheme.onSurfaceVariant)
+    val isFirst = day.dayOfMonth == 1
+
     Column(
         modifier = modifier
-            .padding(1.dp)
+            .combinedClickable(onClick = onClick, onLongClick = onLongClick)
-            .clickable(onClick = onClick),
+            .padding(horizontal = 1.dp, vertical = 2.dp),
         horizontalAlignment = Alignment.CenterHorizontally,
     ) {
-        Box(contentAlignment = Alignment.Center, modifier = Modifier.padding(top = 2.dp)) {
+        Row(verticalAlignment = Alignment.CenterVertically) {
+            if (isFirst) {
+                Text(
+                    day.month.getDisplayName(TextStyle.SHORT, com.scarriffle.calendarr.ui.L10n.locale(lang)),
+                    fontSize = 8.sp,
+                    color = monthLabelColor,
+                    modifier = Modifier.padding(end = 2.dp),
+                )
+            }
+            Box(contentAlignment = Alignment.Center) {
                 if (isToday) {
                     Box(
                         Modifier
-                        .height(22.dp).width(22.dp)
+                            .height(18.dp)
-                        .clip(RoundedCornerShape(11.dp))
+                            .width(18.dp)
+                            .clip(RoundedCornerShape(9.dp))
                             .background(todayColor),
                     )
                 }
                 Text(
                     "${day.dayOfMonth}",
-                style = MaterialTheme.typography.labelMedium,
+                    fontSize = 11.sp,
                     fontWeight = if (isToday) FontWeight.Bold else FontWeight.Normal,
-                color = when {
+                    color = if (isToday) todayColor.contrastingTextColor() else MaterialTheme.colorScheme.onBackground,
-                    isToday -> todayColor.contrastingTextColor()
-                    inMonth -> MaterialTheme.colorScheme.onBackground
-                    else -> MaterialTheme.colorScheme.outline
-                },
                 )
             }
-        events.take(3).forEach { ev ->
-            EventChip(ev, onClick = { onEventClick(ev) })
         }
+        events.take(3).forEach { ev -> EventChip(ev) { onEventClick(ev) } }
         if (events.size > 3) {
-            Text(
+            Text("+${events.size - 3}", fontSize = 8.sp, color = MaterialTheme.colorScheme.onSurfaceVariant)
-                "+${events.size - 3}",
-                style = MaterialTheme.typography.labelSmall,
-                fontSize = 8.sp,
-                color = MaterialTheme.colorScheme.onSurfaceVariant,
-            )
         }
     }
 }
@@ -140,26 +222,26 @@ private fun DayCell(
 @Composable
 private fun EventChip(event: CalEvent, onClick: () -> Unit) {
     val color = colorFromHex(event.effectiveColor)
-    Box(
+    Surface(
-        Modifier
+        color = color,
+        shape = RoundedCornerShape(3.dp),
+        modifier = Modifier
             .fillMaxWidth()
-            .padding(horizontal = 1.dp, vertical = 1.dp)
+            .padding(horizontal = 1.dp, vertical = 0.5.dp)
-            .clip(RoundedCornerShape(3.dp))
+            .clickable(onClick = onClick),
-            .background(color)
-            .clickable(onClick = onClick)
-            .padding(horizontal = 3.dp, vertical = 1.dp),
     ) {
         Text(
             event.title,
             maxLines = 1,
             overflow = TextOverflow.Ellipsis,
-            fontSize = 9.sp,
+            fontSize = 8.sp,
             color = color.contrastingTextColor(),
+            modifier = Modifier.padding(horizontal = 3.dp, vertical = 1.dp),
         )
     }
 }
 
-private fun startOfWeekFor(date: LocalDate, mondayFirst: Boolean): LocalDate {
+private fun startOfWeek(date: LocalDate, mondayFirst: Boolean): LocalDate {
     val dow = date.dayOfWeek.value
     val offset = if (mondayFirst) dow - 1 else dow % 7
     return date.minusDays(offset.toLong())

app/src/main/java/com/scarriffle/calendarr/ui/theme/Theme.kt

@@ -25,12 +25,22 @@ fun CalendarrTheme(
 ) {
     val primary = BrandGreen
 
+    val container = Color(0xFF14532D)
+    val onContainer = Color(0xFFB7F0C6)
     val colors = darkColorScheme(
         primary = primary,
         onPrimary = primary.contrastingTextColor(),
+        primaryContainer = container,
+        onPrimaryContainer = onContainer,
         secondary = primary,
         onSecondary = primary.contrastingTextColor(),
+        secondaryContainer = container,
+        onSecondaryContainer = onContainer,
         tertiary = primary,
+        onTertiary = primary.contrastingTextColor(),
+        tertiaryContainer = container,
+        onTertiaryContainer = onContainer,
+        surfaceTint = primary,
         background = Color(0xFF000000),
         onBackground = Color(0xFFF2F2F7),
         surface = Color(0xFF1C1C1E),

app/src/main/java/com/scarriffle/calendarr/util/ColorUtil.kt

@@ -5,8 +5,15 @@ import androidx.compose.ui.graphics.Color
 /** Parse a "#RRGGBB" (or "RRGGBB") hex string into a Compose [Color]. */
 fun colorFromHex(hex: String?, fallback: Color = Color(0xFF4285F4)): Color {
     if (hex.isNullOrBlank()) return fallback
-    val clean = hex.trim().removePrefix("#")
+    val clean = hex.trim().removePrefix("#").filter { it.isLetterOrDigit() }
     return when (clean.length) {
+        3 -> runCatching {
+            // #RGB shorthand -> expand each nibble
+            val r = clean[0].digitToInt(16) * 17
+            val g = clean[1].digitToInt(16) * 17
+            val b = clean[2].digitToInt(16) * 17
+            Color(r / 255f, g / 255f, b / 255f, 1f)
+        }.getOrDefault(fallback)
         6 -> runCatching {
             val v = clean.toLong(16)
             Color(