Merge pull request 'fix(edit): curate the CalDAV colour picker (#22)' (!70) from fix/caldav-color-picker-v2 into release/v2.14.1

Reviewed-on: #70

CHANGELOG.md

@@ -5,6 +5,19 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Fixed
+- A tidy colour picker on CalDAV calendars. For calendars synced by a CalDAV
+  app (such as DAVx5), the event colour picker showed every colour the account
+  publishes — nearly 150 swatches in alphabetical order, many of them
+  duplicates or near-identical shades. The picker now shows only visually
+  distinct colours, arranged as a rainbow; near-duplicate shades and the
+  washed-out neutrals are folded away so no two swatches look alike. Picked
+  colours still sync exactly as before, and calendars with hand-picked
+  palettes (like Google's) are unaffected. Thanks to @ptab for the report
+  ([#22]).
+
 ## [2.14.0] — 2026-07-06
 
 ### Added
@@ -865,6 +878,7 @@ automatically, with zero telemetry and no internet permission.
 [#18]: https://codeberg.org/jlmakiola/calendula/issues/18
 [#19]: https://codeberg.org/jlmakiola/calendula/issues/19
 [#20]: https://codeberg.org/jlmakiola/calendula/issues/20
+[#22]: https://codeberg.org/jlmakiola/calendula/issues/22
 [#24]: https://codeberg.org/jlmakiola/calendula/issues/24
 [#25]: https://codeberg.org/jlmakiola/calendula/issues/25
 [#27]: https://codeberg.org/jlmakiola/calendula/issues/27

app/src/main/AndroidManifest.xml

@@ -123,6 +123,22 @@
                 <data android:mimeType="vnd.android.cursor.dir/event" />
             </intent-filter>
 
+            <!-- Open an existing event another app/widget points at (e.g. tapping
+                 an event in the Todo Agenda widget): ACTION_VIEW on
+                 content://com.android.calendar/events/<id>, the way AOSP fires it.
+                 Matched by the provider's item MIME type, not the path — a
+                 content: VIEW intent carries the resolved type
+                 (vnd.android.cursor.item/event) and a path-only filter wouldn't
+                 match it. The occurrence's times ride as EXTRA_EVENT_BEGIN_TIME /
+                 EXTRA_EVENT_END_TIME when the launcher supplies them
+                 (MainActivity.viewEventKeyOrNull, issue #48). -->
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+                <data android:mimeType="vnd.android.cursor.item/event" />
+            </intent-filter>
+
             <!-- Launcher long-press shortcuts (e.g. "New event"). -->
             <meta-data
                 android:name="android.app.shortcuts"

app/src/main/java/de/jeanlucmakiola/calendula/MainActivity.kt

@@ -32,6 +32,7 @@ import de.jeanlucmakiola.calendula.ui.common.LocalShowHourLines
 import de.jeanlucmakiola.calendula.ui.common.LocalUse24HourFormat
 import de.jeanlucmakiola.calendula.ui.WidgetNavRequest
 import de.jeanlucmakiola.calendula.ui.common.CalendarView
+import de.jeanlucmakiola.calendula.ui.detail.EventDetailViewModel.Companion.NO_OCCURRENCE_TIME
 import de.jeanlucmakiola.floret.components.DebugRibbon
 import de.jeanlucmakiola.calendula.ui.crash.CrashReportActivity
 import de.jeanlucmakiola.calendula.domain.FontRole
@@ -90,7 +91,7 @@ class MainActivity : AppCompatActivity() {
         }
 
         enableEdgeToEdge()
-        requestedDetailKey = intent.detailKeyOrNull()
+        requestedDetailKey = intent.detailKeyOrNull() ?: intent.viewEventKeyOrNull()
         requestedNav = intent.navRequestOrNull()
         requestedImportUri = intent.importUriOrNull()
         requestedInsertForm = intent.insertFormOrNull()
@@ -178,7 +179,7 @@ class MainActivity : AppCompatActivity() {
 
     override fun onNewIntent(intent: Intent) {
         super.onNewIntent(intent)
-        intent.detailKeyOrNull()?.let { requestedDetailKey = it }
+        (intent.detailKeyOrNull() ?: intent.viewEventKeyOrNull())?.let { requestedDetailKey = it }
         intent.navRequestOrNull()?.let { requestedNav = it }
         intent.importUriOrNull()?.let { requestedImportUri = it }
         intent.insertFormOrNull()?.let { requestedInsertForm = it }
@@ -293,6 +294,30 @@ class MainActivity : AppCompatActivity() {
         )
     }
 
+    /**
+     * The detail key for an external "open this event" — ACTION_VIEW on
+     * `content://com.android.calendar/events/<id>`, the way AOSP fires it (e.g.
+     * tapping an existing event in the Todo Agenda widget, issue #48). Reuses the
+     * same occurrence-key channel as reminder taps. The launcher passes the
+     * occurrence's times as `EXTRA_EVENT_BEGIN_TIME` / `EXTRA_EVENT_END_TIME` when
+     * it has them; a bare URI omits them, so we carry [NO_OCCURRENCE_TIME] and
+     * [EventDetailViewModel] falls back to the event row's own DTSTART/DTEND
+     * rather than rendering at the epoch.
+     */
+    private fun Intent.viewEventKeyOrNull(): LongArray? {
+        if (action != Intent.ACTION_VIEW) return null
+        val uri = data ?: return null
+        if (uri.host != CALENDAR_PROVIDER_HOST) return null
+        val segments = uri.pathSegments
+        if (segments.firstOrNull() != "events") return null
+        val eventId = segments.getOrNull(1)?.toLongOrNull() ?: return null
+        return longArrayOf(
+            eventId,
+            longExtraOrNull(CalendarContract.EXTRA_EVENT_BEGIN_TIME) ?: NO_OCCURRENCE_TIME,
+            longExtraOrNull(CalendarContract.EXTRA_EVENT_END_TIME) ?: NO_OCCURRENCE_TIME,
+        )
+    }
+
     companion object {
         // The calendar provider's authority/host. A date tap arrives as
         // ACTION_VIEW on content://com.android.calendar/time/<epochMillis>.

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/CalendarDataSource.kt

@@ -22,6 +22,7 @@ import de.jeanlucmakiola.calendula.domain.CalendarSource
 import de.jeanlucmakiola.calendula.domain.EventAttendee
 import de.jeanlucmakiola.calendula.domain.EventColorOption
 import de.jeanlucmakiola.calendula.domain.EventDetail
+import de.jeanlucmakiola.calendula.domain.curatedForPicker
 import de.jeanlucmakiola.calendula.domain.EventForm
 import de.jeanlucmakiola.calendula.domain.EventInstance
 import de.jeanlucmakiola.calendula.domain.EventStatus
@@ -63,10 +64,12 @@ interface CalendarDataSource {
 
     /**
      * The event-colour palette the calendar's account publishes
-     * (`CalendarContract.Colors`, `TYPE_EVENT`), sorted by key. Empty when the
-     * account exposes no palette (most local calendars, some CalDAV) — the
-     * signal that a custom colour can only be written as a raw `EVENT_COLOR`,
-     * which a synced calendar may drop on its next sync.
+     * (`CalendarContract.Colors`, `TYPE_EVENT`), curated for display — deduped,
+     * thinned to visually distinct swatches when oversized (CalDAV adapters
+     * publish all ~147 CSS3 names, #22) and hue-sorted; see [curatedForPicker].
+     * Empty when the account exposes no palette (most local calendars, some
+     * CalDAV) — the signal that a custom colour can only be written as a raw
+     * `EVENT_COLOR`, which a synced calendar may drop on its next sync.
      */
     fun eventColorPalette(calendarId: Long): List<EventColorOption>
 
@@ -492,7 +495,13 @@ class AndroidCalendarDataSource @Inject constructor(
         return resolver.query(
             uri,
             InstanceProjection.COLUMNS,
-            null, null,
+            // Hide cancelled occurrences: "delete only this event" writes a
+            // cancelled exception for the one instance (#47). A NULL status is a
+            // normal, un-cancelled event, so it must survive the filter — a bare
+            // `!= CANCELED` would drop it (NULL != 2 is NULL, not true).
+            "${CalendarContract.Instances.STATUS} IS NULL OR " +
+                "${CalendarContract.Instances.STATUS} != ${CalendarContract.Events.STATUS_CANCELED}",
+            null,
             CalendarContract.Instances.BEGIN + " ASC",
         )?.use { c -> c.mapAllNotNull { CursorColumnReader(c).toEventInstance() } } ?: emptyList()
     }
@@ -611,7 +620,7 @@ class AndroidCalendarDataSource @Inject constructor(
             c.mapAll { EventColorOption(key = it.getString(0).orEmpty(), argb = it.getInt(1)) }
         }
             ?.filter { it.key.isNotEmpty() }
-            ?.sortedBy { it.key }
+            ?.curatedForPicker()
             ?: emptyList()
     }
 
@@ -1183,15 +1192,25 @@ class AndroidCalendarDataSource @Inject constructor(
 
     override fun deleteOccurrence(eventId: Long, beginMillis: Long) {
         // A cancelled exception row hides exactly this occurrence; the sync
-        // adapter turns it into an EXDATE/cancelled VEVENT upstream.
-        val values = ContentValues().apply {
-            put(CalendarContract.Events.ORIGINAL_INSTANCE_TIME, beginMillis)
-            put(CalendarContract.Events.STATUS, CalendarContract.Events.STATUS_CANCELED)
-        }
+        // adapter turns it into an EXDATE/cancelled VEVENT upstream. It has to
+        // carry the full time set (DTSTART + DURATION + zone), not just STATUS:
+        // the provider only demotes the cloned exception to a single instance —
+        // clearing the inherited RRULE — when it can derive that instance from
+        // those columns. A STATUS-only cancel left the RRULE standing and
+        // cancelled the whole series, wiping every other occurrence (#47), the
+        // same trap the edit path documents (Codeberg #16).
+        val row = querySeriesRow(eventId)
+        val values = buildOccurrenceCancelValues(
+            originalInstanceMillis = beginMillis,
+            dtStartMillis = beginMillis,
+            duration = row.duration,
+            timezone = row.timezone,
+            allDay = row.allDay,
+        )
         val uri = ContentUris.withAppendedId(
             CalendarContract.Events.CONTENT_EXCEPTION_URI, eventId,
         )
-        resolver.insert(uri, values)
+        resolver.insert(uri, values.toContentValues())
             ?: throw WriteFailedException("cancel occurrence event id=$eventId begin=$beginMillis")
     }
 

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/EventWriteMapper.kt

@@ -182,6 +182,33 @@ internal fun buildOccurrenceExceptionValues(
     putAll(eventColorColumns(form.colorKey, form.color))
 }
 
+/**
+ * Column values for a *cancelled*-occurrence exception row ("delete only this
+ * event"): inserting them at `Events.CONTENT_EXCEPTION_URI/<id>` makes the
+ * provider clone the series row and cancel exactly this one instance.
+ *
+ * As with [buildOccurrenceExceptionValues], the occurrence must be anchored with
+ * DTSTART + DURATION so the provider derives a single instance and clears the
+ * inherited RRULE. A STATUS-only cancel skips that: the clone keeps the RRULE, so
+ * the *whole series* is cancelled and every other occurrence disappears
+ * (Codeberg #47). The occurrence's length/zone come straight from the series row
+ * — cancelling never changes them.
+ */
+internal fun buildOccurrenceCancelValues(
+    originalInstanceMillis: Long,
+    dtStartMillis: Long,
+    duration: String?,
+    timezone: String?,
+    allDay: Int,
+): Map<String, Any?> = buildMap {
+    put(CalendarContract.Events.ORIGINAL_INSTANCE_TIME, originalInstanceMillis)
+    put(CalendarContract.Events.DTSTART, dtStartMillis)
+    put(CalendarContract.Events.DURATION, duration)
+    put(CalendarContract.Events.EVENT_TIMEZONE, timezone)
+    put(CalendarContract.Events.ALL_DAY, allDay)
+    put(CalendarContract.Events.STATUS, CalendarContract.Events.STATUS_CANCELED)
+}
+
 /**
  * The `EVENT_COLOR` / `EVENT_COLOR_KEY` columns for a colour selection. A
  * [colorKey] writes the key alone (the provider derives `EVENT_COLOR` from the

app/src/main/java/de/jeanlucmakiola/calendula/domain/EventColorPalette.kt

@@ -0,0 +1,185 @@
+package de.jeanlucmakiola.calendula.domain
+
+import kotlin.math.abs
+import kotlin.math.atan2
+import kotlin.math.cbrt
+import kotlin.math.hypot
+import kotlin.math.pow
+import kotlin.math.roundToInt
+import kotlin.math.sqrt
+
+/**
+ * Curates an account's published event palette for the colour picker.
+ *
+ * Sync adapters differ wildly in what they publish: Google exposes a
+ * hand-picked two-dozen set, while CalDAV adapters (DAVx5) dump all ~147 CSS3
+ * named colours — including exact-value aliases (aqua/cyan, the gray/grey
+ * spelling pairs) and dozens of visually indistinguishable whites and grays
+ * (#22).
+ *
+ * Crucially, curation runs against the colour the picker actually *paints*, not
+ * the raw provider value. The picker softens every swatch through [pastelArgb]:
+ * it pins lightness to a constant and caps saturation, so the raw palette's
+ * lightness axis is invisible on screen. Two raw colours that look different —
+ * a navy and a mid blue — paint as one swatch, and every neutral (black, the
+ * grays, white) paints as the same pale tint. Judging distinctness in raw
+ * space, as before, left near-identical painted swatches and stranded the
+ * neutrals as a run of look-alike "pinks" at the end of the grid.
+ *
+ * Three steps, all in painted space:
+ *  1. Collapse swatches that paint identically to one (alphabetically-first key
+ *     wins, deterministically) — this folds aliases, dark/light shades of a
+ *     hue, and all the neutrals together.
+ *  2. Oversized palettes (> [CURATION_TRIGGER_SIZE]) drop the washed-out
+ *     neutral-origin tints (painted chroma < [PASTEL_CHROMA_FLOOR]) and are
+ *     then thinned to visually distinct colours: most vivid first, a colour is
+ *     kept only when at least [MIN_DELTA_E] (CIE76, painted Lab) from every
+ *     colour already kept. Small palettes are already curated by their adapter
+ *     and pass through whole.
+ *  3. The survivors are ordered like a rainbow — continuously by painted hue —
+ *     with the wheel cut at its single widest empty gap so the one unavoidable
+ *     seam lands in dead space and no hue family is torn across both ends.
+ *
+ * Every surviving option keeps its provider [EventColorOption.key], so a pick
+ * still round-trips through sync.
+ */
+fun List<EventColorOption>.curatedForPicker(): List<EventColorOption> {
+    val painted = sortedBy { it.key }
+        .distinctBy { pastelArgb(it.argb) }
+        .map { it to Lab.of(pastelArgb(it.argb)) }
+    val kept = if (painted.size <= CURATION_TRIGGER_SIZE) {
+        painted
+    } else {
+        thin(painted.filter { (_, lab) -> lab.chroma >= PASTEL_CHROMA_FLOOR })
+    }
+    return orderAroundWheel(kept).map { (option, _) -> option }
+}
+
+/**
+ * Orders swatches continuously around the (painted) hue wheel, then cuts the
+ * circle at its widest angular gap so the single seam lands in empty space
+ * instead of mid-family. Saturation breaks ties, vivid first.
+ */
+private fun orderAroundWheel(
+    swatches: List<Pair<EventColorOption, Lab>>,
+): List<Pair<EventColorOption, Lab>> {
+    if (swatches.size < 2) return swatches
+    val byHue = swatches.sortedWith(
+        compareBy({ (_, lab) -> lab.hue }, { (_, lab) -> -lab.chroma }),
+    )
+    // Split the wheel after the largest empty arc between neighbouring hues;
+    // the default is the wrap gap (last hue back round to the first), i.e. the
+    // familiar 0→360 order, and we only rotate away from it for a wider void.
+    var cutAfter = byHue.lastIndex
+    var widestGap = 360.0 - byHue.last().second.hue + byHue.first().second.hue
+    for (i in 0 until byHue.lastIndex) {
+        val gap = byHue[i + 1].second.hue - byHue[i].second.hue
+        if (gap > widestGap) {
+            widestGap = gap
+            cutAfter = i
+        }
+    }
+    return byHue.subList(cutAfter + 1, byHue.size) + byHue.subList(0, cutAfter + 1)
+}
+
+/** Greedy max-distance filter: vivid colours stake out clusters first. */
+private fun thin(
+    swatches: List<Pair<EventColorOption, Lab>>,
+): List<Pair<EventColorOption, Lab>> {
+    val byVividness = swatches
+        .sortedWith(compareByDescending<Pair<EventColorOption, Lab>> { it.second.chroma }.thenBy { it.first.key })
+    val kept = mutableListOf<Pair<EventColorOption, Lab>>()
+    for (candidate in byVividness) {
+        if (kept.none { it.second.deltaE(candidate.second) < MIN_DELTA_E }) kept += candidate
+    }
+    return kept
+}
+
+/**
+ * The softening the colour picker paints over every swatch: keep the hue, scale
+ * and clamp saturation into a gentle band, and pin value to a constant so
+ * nothing screams and everything reads on the surface. Value is fixed here so
+ * curation is theme-independent — only hue and saturation distinguish painted
+ * swatches.
+ *
+ * This is a self-contained mirror of floret-kit's `pastelize` hue/saturation
+ * shaping (`de.jeanlucmakiola.floret.components.pastelize`), with value pinned
+ * rather than theme-picked. Curation must reason about the colour the picker
+ * paints, so the two shapings have to agree: if floret's saturation band or
+ * curve changes, update this in step.
+ */
+fun pastelArgb(rawArgb: Int): Int {
+    val r = ((rawArgb shr 16) and 0xFF) / 255f
+    val g = ((rawArgb shr 8) and 0xFF) / 255f
+    val b = (rawArgb and 0xFF) / 255f
+    val max = maxOf(r, g, b)
+    val min = minOf(r, g, b)
+    val delta = max - min
+    val hue = when {
+        delta == 0f -> 0f
+        max == r -> 60f * (((g - b) / delta) % 6f)
+        max == g -> 60f * (((b - r) / delta) + 2f)
+        else -> 60f * (((r - g) / delta) + 4f)
+    }.let { if (it < 0f) it + 360f else it }
+    val sat = (if (max == 0f) 0f else delta / max) * 0.6f
+    val s = sat.coerceIn(0.25f, 0.65f)
+    val v = PASTEL_VALUE
+    val c = v * s
+    val x = c * (1f - abs((hue / 60f) % 2f - 1f))
+    val m = v - c
+    val (rr, gg, bb) = when {
+        hue < 60f -> Triple(c, x, 0f)
+        hue < 120f -> Triple(x, c, 0f)
+        hue < 180f -> Triple(0f, c, x)
+        hue < 240f -> Triple(0f, x, c)
+        hue < 300f -> Triple(x, 0f, c)
+        else -> Triple(c, 0f, x)
+    }
+    fun channel(value: Float) = ((value + m) * 255f).roundToInt().coerceIn(0, 255)
+    return (0xFF shl 24) or (channel(rr) shl 16) or (channel(gg) shl 8) or channel(bb)
+}
+
+/** Reference lightness for curation; the picker paints at this on dark surfaces. */
+private const val PASTEL_VALUE = 0.82f
+
+/** Palettes at most this big skip the thinning (Google's ~26 pass through). */
+private const val CURATION_TRIGGER_SIZE = 36
+
+/** Minimum CIE76 ΔE between surviving painted swatches. */
+private const val MIN_DELTA_E = 13.0
+
+/**
+ * Painted-chroma floor for oversized palettes: below this a swatch is a washed-
+ * out tint — the neutrals and near-whites the saturation clamp muddies — so it
+ * is dropped rather than shown as pale filler.
+ */
+private const val PASTEL_CHROMA_FLOOR = 22.0
+
+/** CIE Lab (D65) — the space where Euclidean distance ≈ perceived difference. */
+private class Lab(val l: Double, val a: Double, val b: Double) {
+    val chroma: Double get() = hypot(a, b)
+
+    /** Hue angle in degrees, 0–360, around the Lab a-b plane. */
+    val hue: Double get() = (Math.toDegrees(atan2(b, a)) + 360.0) % 360.0
+
+    fun deltaE(other: Lab): Double =
+        sqrt((l - other.l).pow(2) + (a - other.a).pow(2) + (b - other.b).pow(2))
+
+    companion object {
+        fun of(argb: Int): Lab {
+            fun linear(shift: Int): Double {
+                val c = ((argb shr shift) and 0xFF) / 255.0
+                return if (c <= 0.04045) c / 12.92 else ((c + 0.055) / 1.055).pow(2.4)
+            }
+            val r = linear(16)
+            val g = linear(8)
+            val b = linear(0)
+            val x = (0.4124 * r + 0.3576 * g + 0.1805 * b) / 0.95047
+            val y = 0.2126 * r + 0.7152 * g + 0.0722 * b
+            val z = (0.0193 * r + 0.1192 * g + 0.9505 * b) / 1.08883
+            fun f(t: Double) = if (t > 0.008856) cbrt(t) else 7.787 * t + 16.0 / 116.0
+            val fy = f(y)
+            return Lab(116 * fy - 16, 500 * (f(x) - fy), 200 * (fy - f(z)))
+        }
+    }
+}

app/src/main/java/de/jeanlucmakiola/calendula/ui/detail/EventDetailViewModel.kt

@@ -141,13 +141,20 @@ class EventDetailViewModel @Inject constructor(
     private suspend fun loadDetail(target: Target): EventDetailUiState = try {
         val detail = repository.eventDetail(target.eventId)
         // The Events row holds the series start; replace it with this
-        // occurrence's time so recurring events render correctly.
-        val corrected = detail.copy(
-            instance = detail.instance.copy(
-                start = Instant.fromEpochMilliseconds(target.beginMillis),
-                end = Instant.fromEpochMilliseconds(target.endMillis),
-            ),
-        )
+        // occurrence's time so recurring events render correctly. An external
+        // "open event" that names no occurrence ([NO_OCCURRENCE_TIME] — e.g. a
+        // bare content://.../events/<id> VIEW intent, issue #48) keeps the row's
+        // own DTSTART/DTEND instead of overriding it to the epoch.
+        val corrected = if (target.beginMillis == NO_OCCURRENCE_TIME) {
+            detail
+        } else {
+            detail.copy(
+                instance = detail.instance.copy(
+                    start = Instant.fromEpochMilliseconds(target.beginMillis),
+                    end = Instant.fromEpochMilliseconds(target.endMillis),
+                ),
+            )
+        }
         val calendar = repository.calendars().first()
             .firstOrNull { it.id == corrected.instance.calendarId }
         EventDetailUiState.Success(
@@ -168,6 +175,16 @@ class EventDetailViewModel @Inject constructor(
 
     /** A tapped occurrence: the series [eventId] plus this occurrence's own times. */
     private data class Target(val eventId: Long, val beginMillis: Long, val endMillis: Long)
+
+    companion object {
+        /**
+         * Sentinel begin/end for an "open this event" that names no occurrence —
+         * a bare `content://com.android.calendar/events/<id>` VIEW intent with no
+         * `EXTRA_EVENT_BEGIN_TIME` (issue #48). [loadDetail] then keeps the event
+         * row's own DTSTART/DTEND instead of overriding it to the epoch.
+         */
+        const val NO_OCCURRENCE_TIME: Long = Long.MIN_VALUE
+    }
 }
 
 /** A filesystem-safe `.ics` file name from an event title (or a fallback). */

app/src/main/java/de/jeanlucmakiola/calendula/ui/edit/EventEditScreen.kt

@@ -134,6 +134,7 @@ import de.jeanlucmakiola.floret.components.GroupedRow
 import de.jeanlucmakiola.calendula.ui.common.MILLIS_PER_DAY
 import de.jeanlucmakiola.floret.components.InlineTextField
 import de.jeanlucmakiola.floret.components.OptionCard
+import de.jeanlucmakiola.floret.components.OptionPicker
 import de.jeanlucmakiola.floret.components.Position
 import de.jeanlucmakiola.floret.components.positionOf
 import de.jeanlucmakiola.calendula.ui.common.REMINDER_PRESETS
@@ -345,29 +346,29 @@ private fun SaveConflictDialog(
     onDiscard: () -> Unit,
     onDismiss: () -> Unit,
 ) {
-    AlertDialog(
-        onDismissRequest = onDismiss,
-        title = { Text(stringResource(R.string.event_edit_conflict_title)) },
-        text = {
-            Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
-                Text(stringResource(R.string.event_edit_conflict_body))
-                Spacer(Modifier.height(4.dp))
-                OptionCard(
-                    label = stringResource(R.string.event_edit_conflict_overwrite),
-                    supportingText = stringResource(R.string.event_edit_conflict_overwrite_hint),
-                    onClick = onOverwrite,
-                )
-                OptionCard(
-                    label = stringResource(R.string.event_edit_conflict_discard),
-                    supportingText = stringResource(R.string.event_edit_conflict_discard_hint),
-                    onClick = onDiscard,
-                )
-            }
-        },
-        confirmButton = {
-            TextButton(onClick = onDismiss) { Text(stringResource(R.string.dialog_cancel)) }
-        },
-    )
+    FullScreenPicker(
+        title = stringResource(R.string.event_edit_conflict_title),
+        onDismiss = onDismiss,
+    ) {
+        Text(
+            text = stringResource(R.string.event_edit_conflict_body),
+            style = MaterialTheme.typography.bodyMedium,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier.padding(horizontal = 24.dp, vertical = 8.dp),
+        )
+        GroupedRow(
+            title = stringResource(R.string.event_edit_conflict_overwrite),
+            summary = stringResource(R.string.event_edit_conflict_overwrite_hint),
+            position = positionOf(0, 2),
+            onClick = onOverwrite,
+        )
+        GroupedRow(
+            title = stringResource(R.string.event_edit_conflict_discard),
+            summary = stringResource(R.string.event_edit_conflict_discard_hint),
+            position = positionOf(1, 2),
+            onClick = onDiscard,
+        )
+    }
 }
 
 /**
@@ -1064,24 +1065,19 @@ private fun FieldPickerDialog(
     onSelect: (EventFormField) -> Unit,
     onDismiss: () -> Unit,
 ) {
-    AlertDialog(
-        onDismissRequest = onDismiss,
-        title = { Text(stringResource(R.string.event_edit_more_fields)) },
-        text = {
-            Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
-                hiddenFields.forEach { field ->
-                    OptionCard(
-                        label = stringResource(eventFormFieldLabel(field)),
-                        onClick = { onSelect(field) },
-                        icon = eventFormFieldIcon(field),
-                    )
-                }
-            }
-        },
-        confirmButton = {
-            TextButton(onClick = onDismiss) { Text(stringResource(R.string.dialog_cancel)) }
-        },
-    )
+    FullScreenPicker(
+        title = stringResource(R.string.event_edit_more_fields),
+        onDismiss = onDismiss,
+    ) {
+        hiddenFields.forEachIndexed { index, field ->
+            GroupedRow(
+                title = stringResource(eventFormFieldLabel(field)),
+                position = positionOf(index, hiddenFields.size),
+                leading = { Icon(imageVector = eventFormFieldIcon(field), contentDescription = null) },
+                onClick = { onSelect(field) },
+            )
+        }
+    }
 }
 
 /** Quick-pick lead times offered as chips in the reminder dialog. */
@@ -1106,41 +1102,10 @@ private fun ReminderPickerDialog(
         ?.takeIf { it in 1..999 }
         ?.let { it * unit.minutesFactor }
 
-    AlertDialog(
-        onDismissRequest = onDismiss,
-        title = { Text(stringResource(R.string.event_edit_add_reminder)) },
-        text = {
-            if (!customMode) {
-                Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
-                    REMINDER_QUICK_PICKS.filterNot { it in alreadyChosen }.forEach { minutes ->
-                        OptionCard(
-                            label = reminderLabel(minutes),
-                            onClick = { onSelect(minutes) },
-                        )
-                    }
-                    OptionCard(
-                        label = stringResource(R.string.event_edit_reminder_custom),
-                        onClick = { customMode = true },
-                        labelColor = MaterialTheme.colorScheme.primary,
-                    )
-                }
-            } else {
-                Row(verticalAlignment = Alignment.CenterVertically) {
-                    DialogAmountField(
-                        value = amountText,
-                        onValueChange = { amountText = it },
-                        placeholder = "10",
-                    )
-                    Spacer(Modifier.width(12.dp))
-                    DialogUnitDropdown(
-                        label = stringResource(reminderUnitLabel(unit)),
-                        entries = ReminderUnit.entries.map { stringResource(reminderUnitLabel(it)) },
-                        onPick = { unit = ReminderUnit.entries[it] },
-                    )
-                }
-            }
-        },
-        confirmButton = {
+    FullScreenPicker(
+        title = stringResource(R.string.event_edit_add_reminder),
+        onDismiss = onDismiss,
+        actions = {
             // The quick-pick list adds on tap; only the custom step needs Add.
             if (customMode) {
                 TextButton(
@@ -1149,10 +1114,41 @@ private fun ReminderPickerDialog(
                 ) { Text(stringResource(R.string.event_edit_add)) }
             }
         },
-        dismissButton = {
-            TextButton(onClick = onDismiss) { Text(stringResource(R.string.dialog_cancel)) }
-        },
-    )
+    ) {
+        if (!customMode) {
+            val presets = REMINDER_QUICK_PICKS.filterNot { it in alreadyChosen }
+            val rowCount = presets.size + 1
+            presets.forEachIndexed { index, minutes ->
+                GroupedRow(
+                    title = reminderLabel(minutes),
+                    position = positionOf(index, rowCount),
+                    onClick = { onSelect(minutes) },
+                )
+            }
+            GroupedRow(
+                title = stringResource(R.string.event_edit_reminder_custom),
+                position = positionOf(rowCount - 1, rowCount),
+                onClick = { customMode = true },
+            )
+        } else {
+            Row(
+                verticalAlignment = Alignment.CenterVertically,
+                modifier = Modifier.padding(horizontal = 24.dp, vertical = 8.dp),
+            ) {
+                DialogAmountField(
+                    value = amountText,
+                    onValueChange = { amountText = it },
+                    placeholder = "10",
+                )
+                Spacer(Modifier.width(12.dp))
+                DialogUnitDropdown(
+                    label = stringResource(reminderUnitLabel(unit)),
+                    entries = ReminderUnit.entries.map { stringResource(reminderUnitLabel(it)) },
+                    onPick = { unit = ReminderUnit.entries[it] },
+                )
+            }
+        }
+    }
 }
 
 /** How a custom recurrence ends; mirrors [RecurrenceEnd] in saveable form. */
@@ -1222,109 +1218,10 @@ private fun RecurrencePickerDialog(
         null
     }
 
-    AlertDialog(
-        onDismissRequest = onDismiss,
-        title = { Text(stringResource(R.string.event_detail_recurrence)) },
-        text = {
-            if (!customMode) {
-                Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
-                    OptionCard(
-                        label = stringResource(R.string.event_edit_recurrence_none),
-                        onClick = { onSelect(null) },
-                        selected = current == null,
-                    )
-                    RecurrenceFreq.entries.forEach { entry ->
-                        OptionCard(
-                            label = stringResource(recurrencePresetLabel(entry)),
-                            onClick = { onSelect(SimpleRecurrence(entry).toRRule()) },
-                            selected = isPlainPreset && parsed?.freq == entry,
-                        )
-                    }
-                    OptionCard(
-                        label = stringResource(R.string.event_edit_recurrence_custom),
-                        onClick = { customMode = true },
-                        selected = current != null && !isPlainPreset,
-                        labelColor = MaterialTheme.colorScheme.primary,
-                    )
-                }
-            } else {
-                Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
-                    Row(verticalAlignment = Alignment.CenterVertically) {
-                        Text(
-                            text = stringResource(R.string.event_edit_recurrence_every),
-                            style = MaterialTheme.typography.titleMedium,
-                        )
-                        Spacer(Modifier.width(12.dp))
-                        DialogAmountField(
-                            value = intervalText,
-                            onValueChange = { intervalText = it },
-                            placeholder = "1",
-                        )
-                        Spacer(Modifier.width(12.dp))
-                        DialogUnitDropdown(
-                            label = stringResource(recurrenceUnitLabel(freq)),
-                            entries = RecurrenceFreq.entries.map {
-                                stringResource(recurrenceUnitLabel(it))
-                            },
-                            onPick = { freq = RecurrenceFreq.entries[it] },
-                        )
-                    }
-                    if (freq == RecurrenceFreq.Weekly) {
-                        Spacer(Modifier.height(4.dp))
-                        WeekdayToggleRow(
-                            selected = daysMask.toDaySet(),
-                            onToggle = { day -> daysMask = daysMask xor day.toMaskBit() },
-                            locale = locale,
-                        )
-                    }
-                    Spacer(Modifier.height(4.dp))
-                    Text(
-                        text = stringResource(R.string.event_edit_recurrence_ends),
-                        style = MaterialTheme.typography.bodyMedium,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant,
-                    )
-                    OptionCard(
-                        label = stringResource(R.string.event_edit_recurrence_end_never),
-                        onClick = { endMode = RecurrenceEndMode.Never },
-                        selected = endMode == RecurrenceEndMode.Never,
-                    )
-                    OptionCard(
-                        label = stringResource(R.string.event_edit_recurrence_end_until),
-                        onClick = {
-                            endMode = RecurrenceEndMode.Until
-                            showUntilPicker = true
-                        },
-                        supportingText = untilDate?.let {
-                            remember(it, locale) {
-                                DateTimeFormatter.ofLocalizedDate(FormatStyle.MEDIUM)
-                                    .withLocale(locale).format(it.toJavaLocalDate())
-                            }
-                        },
-                        selected = endMode == RecurrenceEndMode.Until,
-                    )
-                    OptionCard(
-                        label = stringResource(R.string.event_edit_recurrence_end_count),
-                        onClick = { endMode = RecurrenceEndMode.Count },
-                        selected = endMode == RecurrenceEndMode.Count,
-                    )
-                    if (endMode == RecurrenceEndMode.Count) {
-                        Row(verticalAlignment = Alignment.CenterVertically) {
-                            DialogAmountField(
-                                value = countText,
-                                onValueChange = { countText = it },
-                                placeholder = "10",
-                            )
-                            Spacer(Modifier.width(12.dp))
-                            Text(
-                                text = stringResource(R.string.event_edit_recurrence_times),
-                                style = MaterialTheme.typography.titleMedium,
-                            )
-                        }
-                    }
-                }
-            }
-        },
-        confirmButton = {
+    FullScreenPicker(
+        title = stringResource(R.string.event_detail_recurrence),
+        onDismiss = onDismiss,
+        actions = {
             // The preset list applies on tap; only the custom step needs OK.
             if (customMode) {
                 TextButton(
@@ -1333,10 +1230,113 @@ private fun RecurrencePickerDialog(
                 ) { Text(stringResource(R.string.dialog_ok)) }
             }
         },
-        dismissButton = {
-            TextButton(onClick = onDismiss) { Text(stringResource(R.string.dialog_cancel)) }
-        },
-    )
+    ) {
+        if (!customMode) {
+            val rowCount = RecurrenceFreq.entries.size + 2
+            GroupedRow(
+                title = stringResource(R.string.event_edit_recurrence_none),
+                position = positionOf(0, rowCount),
+                selected = current == null,
+                onClick = { onSelect(null) },
+            )
+            RecurrenceFreq.entries.forEachIndexed { index, entry ->
+                GroupedRow(
+                    title = stringResource(recurrencePresetLabel(entry)),
+                    position = positionOf(index + 1, rowCount),
+                    selected = isPlainPreset && parsed?.freq == entry,
+                    onClick = { onSelect(SimpleRecurrence(entry).toRRule()) },
+                )
+            }
+            GroupedRow(
+                title = stringResource(R.string.event_edit_recurrence_custom),
+                position = positionOf(rowCount - 1, rowCount),
+                selected = current != null && !isPlainPreset,
+                onClick = { customMode = true },
+            )
+        } else {
+            Column(
+                verticalArrangement = Arrangement.spacedBy(8.dp),
+                modifier = Modifier.padding(horizontal = 24.dp),
+            ) {
+                Row(verticalAlignment = Alignment.CenterVertically) {
+                    Text(
+                        text = stringResource(R.string.event_edit_recurrence_every),
+                        style = MaterialTheme.typography.titleMedium,
+                    )
+                    Spacer(Modifier.width(12.dp))
+                    DialogAmountField(
+                        value = intervalText,
+                        onValueChange = { intervalText = it },
+                        placeholder = "1",
+                    )
+                    Spacer(Modifier.width(12.dp))
+                    DialogUnitDropdown(
+                        label = stringResource(recurrenceUnitLabel(freq)),
+                        entries = RecurrenceFreq.entries.map {
+                            stringResource(recurrenceUnitLabel(it))
+                        },
+                        onPick = { freq = RecurrenceFreq.entries[it] },
+                    )
+                }
+                if (freq == RecurrenceFreq.Weekly) {
+                    WeekdayToggleRow(
+                        selected = daysMask.toDaySet(),
+                        onToggle = { day -> daysMask = daysMask xor day.toMaskBit() },
+                        locale = locale,
+                    )
+                }
+                Text(
+                    text = stringResource(R.string.event_edit_recurrence_ends),
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+            GroupedRow(
+                title = stringResource(R.string.event_edit_recurrence_end_never),
+                position = positionOf(0, 3),
+                selected = endMode == RecurrenceEndMode.Never,
+                onClick = { endMode = RecurrenceEndMode.Never },
+            )
+            GroupedRow(
+                title = stringResource(R.string.event_edit_recurrence_end_until),
+                summary = untilDate?.let {
+                    remember(it, locale) {
+                        DateTimeFormatter.ofLocalizedDate(FormatStyle.MEDIUM)
+                            .withLocale(locale).format(it.toJavaLocalDate())
+                    }
+                },
+                position = positionOf(1, 3),
+                selected = endMode == RecurrenceEndMode.Until,
+                onClick = {
+                    endMode = RecurrenceEndMode.Until
+                    showUntilPicker = true
+                },
+            )
+            GroupedRow(
+                title = stringResource(R.string.event_edit_recurrence_end_count),
+                position = positionOf(2, 3),
+                selected = endMode == RecurrenceEndMode.Count,
+                onClick = { endMode = RecurrenceEndMode.Count },
+            )
+            if (endMode == RecurrenceEndMode.Count) {
+                Row(
+                    verticalAlignment = Alignment.CenterVertically,
+                    modifier = Modifier.padding(horizontal = 24.dp, vertical = 4.dp),
+                ) {
+                    DialogAmountField(
+                        value = countText,
+                        onValueChange = { countText = it },
+                        placeholder = "10",
+                    )
+                    Spacer(Modifier.width(12.dp))
+                    Text(
+                        text = stringResource(R.string.event_edit_recurrence_times),
+                        style = MaterialTheme.typography.titleMedium,
+                    )
+                }
+            }
+        }
+    }
 
     if (showUntilPicker) {
         CalendarDatePickerDialog(
@@ -1701,24 +1701,14 @@ private fun VisibilityPickerDialog(
     onSelect: (AccessLevel) -> Unit,
     onDismiss: () -> Unit,
 ) {
-    AlertDialog(
-        onDismissRequest = onDismiss,
-        title = { Text(stringResource(R.string.event_edit_visibility)) },
-        text = {
-            Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
-                AccessLevel.entries.forEach { level ->
-                    OptionCard(
-                        label = stringResource(accessLevelLabel(level)),
-                        onClick = { onSelect(level) },
-                        icon = accessLevelIcon(level),
-                        selected = level == selected,
-                    )
-                }
-            }
-        },
-        confirmButton = {
-            TextButton(onClick = onDismiss) { Text(stringResource(R.string.dialog_cancel)) }
-        },
+    OptionPicker(
+        title = stringResource(R.string.event_edit_visibility),
+        options = AccessLevel.entries.toList(),
+        selected = selected,
+        label = { stringResource(accessLevelLabel(it)) },
+        onSelect = onSelect,
+        onDismiss = onDismiss,
+        leading = { Icon(imageVector = accessLevelIcon(it), contentDescription = null) },
     )
 }
 
@@ -1741,51 +1731,57 @@ private fun ColorPickerDialog(
     onDismiss: () -> Unit,
 ) {
     val dark = isSystemInDarkTheme()
-    AlertDialog(
-        onDismissRequest = onDismiss,
-        title = { Text(stringResource(R.string.event_edit_color)) },
-        text = {
-            Column(verticalArrangement = Arrangement.spacedBy(12.dp)) {
-                if (palette.isNotEmpty()) {
-                    ColorSwatchRow(
-                        colors = palette.map { it.argb },
-                        selected = selected,
-                        onSelect = { argb ->
-                            palette.firstOrNull { it.argb == argb }
-                                ?.let { onPickKey(it.key, it.argb) }
-                        },
-                        dark = dark,
-                    )
-                } else {
-                    ColorSwatchRow(
-                        colors = CalendarColorPalette.all,
-                        selected = selected,
-                        onSelect = onPickRaw,
-                        dark = dark,
-                    )
-                    if (syncWarning) {
-                        Text(
-                            text = stringResource(R.string.event_edit_color_sync_warning),
-                            style = MaterialTheme.typography.bodySmall,
-                            color = MaterialTheme.colorScheme.onSurfaceVariant,
-                        )
-                    }
-                }
-            }
-        },
-        confirmButton = {
-            TextButton(onClick = onDismiss) { Text(stringResource(R.string.dialog_cancel)) }
-        },
-        dismissButton = if (hasExplicitColor) {
-            {
+    FullScreenPicker(
+        title = stringResource(R.string.event_edit_color),
+        onDismiss = onDismiss,
+        actions = {
+            if (hasExplicitColor) {
                 TextButton(onClick = onClear) {
                     Text(stringResource(R.string.event_edit_color_reset))
                 }
             }
-        } else {
-            null
         },
-    )
+    ) {
+        Column(
+            verticalArrangement = Arrangement.spacedBy(12.dp),
+            modifier = Modifier.padding(horizontal = 24.dp, vertical = 8.dp),
+        ) {
+            if (palette.isNotEmpty()) {
+                // The event's current colour may not be in the curated palette
+                // (a thinned near-duplicate, or a raw colour set elsewhere) —
+                // append it so the selection ring has a home.
+                val swatches = palette.map { it.argb }.let {
+                    if (selected != null && selected !in it) it + selected else it
+                }
+                ColorSwatchRow(
+                    colors = swatches,
+                    selected = selected,
+                    onSelect = { argb ->
+                        val option = palette.firstOrNull { it.argb == argb }
+                        // The appended current colour has no provider key to
+                        // write — it is already the event's colour, so just
+                        // close.
+                        if (option != null) onPickKey(option.key, option.argb) else onDismiss()
+                    },
+                    dark = dark,
+                )
+            } else {
+                ColorSwatchRow(
+                    colors = CalendarColorPalette.all,
+                    selected = selected,
+                    onSelect = onPickRaw,
+                    dark = dark,
+                )
+                if (syncWarning) {
+                    Text(
+                        text = stringResource(R.string.event_edit_color_sync_warning),
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
+        }
+    }
 }
 
 private fun accessLevelIcon(level: AccessLevel): ImageVector = when (level) {

app/src/main/java/de/jeanlucmakiola/calendula/ui/settings/SettingsScreen.kt

@@ -160,7 +160,7 @@ private enum class ChipAccent { Neutral, Primary, Tertiary }
  * Settings (M4), restructured in v2.3 into a category hub with sub-screens.
  * Both the hub and the sub-screens use a collapsing [LargeTopAppBar] and the
  * grouped-row card system. Calendars opens the separate manager hoisted in
- * [CalendarHost]; Language opens an inline OptionCard dialog; About is a card
+ * [CalendarHost]; Language opens a full-screen picker; About is a card
  * at the top. A full-screen destination; [onBack] pops it.
  */
 @Composable

app/src/main/res/values-de/strings.xml

@@ -220,7 +220,7 @@
     <string name="search_action">Suchen</string>
     <string name="search_hint">Termine suchen</string>
     <string name="search_back">Zurück</string>
-    <string name="search_clear">Löschen</string>
+    <string name="search_clear">Leeren</string>
     <string name="search_idle_hint">Durchsuche deine Termine nach Titel, Ort oder Notizen.</string>
     <string name="search_empty">Keine Termine passen zu „%1$s“.</string>
     <!-- Startbildschirm-Widgets -->
@@ -330,7 +330,7 @@
     <string name="calendars_add">Kalender hinzufügen</string>
     <string name="calendars_synced_header">Synchronisierte Kalender</string>
     <string name="calendars_synced_hint">Diese stammen von Konten auf deinem Gerät. Erstelle und bearbeite sie in der jeweiligen App.</string>
-    <string name="calendars_manage_in_app">Verwalten</string>
+    <string name="calendars_manage_in_app">In der App verwalten</string>
     <string name="calendars_add_account">Konto hinzufügen</string>
     <string name="calendars_new_title">Neuer Kalender</string>
     <string name="calendars_edit_title">Kalender bearbeiten</string>
@@ -394,10 +394,10 @@
         <item quantity="other">%d Tage</item>
     </plurals>
     <plurals name="duration_weeks">
-        <item quantity="one">Woche</item>
-        <item quantity="other">Wochen</item>
+        <item quantity="one">%d Woche</item>
+        <item quantity="other">%d Wochen</item>
     </plurals>
-    <string name="settings_default_view">Standartansicht</string>
+    <string name="settings_default_view">Standardansicht</string>
     <string name="settings_font_headings">Überschriften Schriftart</string>
     <string name="settings_font_system">Systemstandard</string>
     <string name="font_jetbrains_mono">JetBrains Mono</string>
@@ -411,4 +411,67 @@
     <string name="settings_past_events_hide">Ausblenden</string>
     <string name="settings_agenda_header">Agenda</string>
     <string name="settings_special_dates_reminders">Erinnerungen</string>
+    <string name="settings_font_body">Inhaltsschriftart</string>
+    <string name="font_atkinson_hyperlegible">Atkinson Hyperlegible</string>
+    <string name="font_lora">Lora</string>
+    <string name="settings_font_custom_selected">Benutzerdefinierte Schriftart</string>
+    <string name="settings_section_views">Ansichten</string>
+    <string name="settings_quick_switch_header">Schnellwechselknopf</string>
+    <string name="settings_quick_switch_hint">Wähle aus, durch welche Ansichten du mit dem Knopf oben rechts wechseln möchtest, und ziehe, um sie neu anzuordnen. Deaktivierte Ansichten bleiben über das Navigationsmenü erreichbar.</string>
+    <string name="settings_drawer_order_header">Navigationsmenü</string>
+    <string name="settings_drawer_order_hint">Ziehen, um die im Navigationsmenü aufgelisteten Ansichten neu anzuordnen.</string>
+    <string name="reorder_drag_handle">Zum Neuanordnen ziehen</string>
+    <string name="settings_calendar_reminders_title">Erinnerungen pro Kalender</string>
+    <string name="settings_translate">Hilf beim Übersetzen</string>
+    <string name="settings_translate_hint">Füge eine Sprache auf Weblate hinzu oder verbessere sie</string>
+    <string name="settings_views_subtitle">Schnellwechsellnopf und Menüreihenfolge</string>
+    <string name="settings_special_dates_subtitle">Kontakte-Geburtstage und Jubiläen</string>
+    <string name="settings_section_special_dates">Besondere Termine von Kontakten</string>
+    <string name="settings_special_dates_enable">Kontakttermine anzeigen</string>
+    <string name="settings_special_dates_enable_hint">Spiegle die Geburtstage und andere Termine deiner Kontakte in lokale Kalender. Liest nur Kontakte auf diesem Gerät – es wird nichts hochgeladen und Ihre Kontakte werden nie geändert.</string>
+    <string name="settings_special_dates_type_birthday">Geburtstage</string>
+    <string name="settings_special_dates_type_anniversary">Jahrestage</string>
+    <string name="settings_special_dates_type_custom">Andere Ereignisse</string>
+    <string name="settings_special_dates_template">Titelformat</string>
+    <string name="settings_special_dates_template_hint">Verwende {Name} für den Kontakt und {Jahr} für das Jahr (das Geburtsjahr oder das Anfangsjahr eines Jahrestages; versteckt, wenn unbekannt).</string>
+    <string name="settings_special_dates_show_year">Jahr anzeigen</string>
+    <string name="settings_special_dates_show_year_hint">{year} in Titel einfügen, wenn bekannt</string>
+    <string name="settings_special_dates_sync_now">Jetzt synchronisieren</string>
+    <string name="settings_special_dates_never_synced">Noch nicht synchronisiert</string>
+    <string name="settings_special_dates_last_synced">Zuletzt synchronisiert %1$s</string>
+    <string name="settings_special_dates_calendar_hint">Lege die Farbe und Sichtbarkeit jedes Kalenders in den Kalendereinstellungen fest.</string>
+    <string name="settings_special_dates_paused_title">Pausiert</string>
+    <string name="settings_calendar_reminders_managed_hint">In den besonderen Terminen der Kontakte setzen</string>
+    <string name="settings_special_dates_paused_hint">Calendula kann deine Kontakte nicht mehr lesen, daher werden diese Kalender nicht aktualisiert.</string>
+    <string name="settings_special_dates_disable_title">Kontakttermine deaktivieren?</string>
+    <string name="settings_special_dates_disable_all_message">Dadurch werden die Kontaktterminkalender und ihre Ereignisse gelöscht. Alle von dir hinzugefügten Erinnerungen oder Notizen gehen verloren.</string>
+    <string name="settings_special_dates_grant">Zugriff gewähren</string>
+    <string name="settings_special_dates_disable_type_message">Dadurch werden der Kalender „%1$s“ und seine Ereignisse gelöscht. Alle von dir hinzugefügten Erinnerungen oder Notizen gehen verloren.</string>
+    <string name="settings_special_dates_disable_confirm">Deaktivieren</string>
+    <string name="dialog_save">Speichern</string>
+    <string name="calendars_disable_hint">Deaktiviere einen Kalender, um ihn aus der App zu entfernen – seine Ereignisse, Filter und Auswahlmöglichkeiten. Es wird nichts gelöscht und du kannst ihn hier jederzeit wieder aktivieren.</string>
+    <string name="calendars_show_in_app_a11y">„%1$s“ in der App anzeigen</string>
+    <string name="calendars_account_menu_a11y">Weitere Optionen für %1$s</string>
+    <string name="calendars_enable_all">Alle aktivieren</string>
+    <string name="calendars_disable_all">Alle deaktivieren</string>
+    <string name="calendars_auto_backup">Automatische Sicherung</string>
+    <string name="calendars_auto_backup_hint">Exportiere deine lokalen Kalender regelmäßig als .ics-Datei in einen Ordner.</string>
+    <string name="calendars_auto_backup_folder">Sicherungsordner</string>
+    <string name="calendars_auto_backup_folder_unset">Tippe, um einen Ordner auszuwählen</string>
+    <string name="calendars_auto_backup_interval">Intervall</string>
+    <string name="calendars_auto_backup_every">Alle %1$s</string>
+    <string name="calendars_auto_backup_interval_min">Mindestens 30 Minuten.</string>
+    <string name="calendars_auto_backup_status_never">Noch keine automatische Sicherung</string>
+    <string name="calendars_auto_backup_status_ok">Letzte Sicherung: %1$s</string>
+    <string name="calendars_auto_backup_status_failed">Letzte Sicherung fehlgeschlagen: %1$s</string>
+    <string name="backup_channel_name">Sicherung</string>
+    <string name="backup_channel_description">Warnt, wenn automatische Sicherungen wiederholt fehlschlagen.</string>
+    <string name="backup_failed_title">Automatische Sicherung fehlgeschlagen</string>
+    <string name="backup_failed_text">Calendula konnte die Sicherungsdatei nicht schreiben. Überprüfe den Sicherungsordner in den Einstellungen.</string>
+    <string name="special_dates_calendar_birthday">Geburtstage</string>
+    <string name="special_dates_calendar_anniversary">Jahrestage</string>
+    <string name="special_dates_calendar_custom">Besondere Termine</string>
+    <string name="special_dates_default_title_birthday">Geburtstag von {name} ({year})</string>
+    <string name="special_dates_default_title_anniversary">Jahrestag von {name} ({year})</string>
+    <string name="special_dates_default_title_custom">{name}</string>
 </resources>

app/src/main/res/values-it/strings.xml

@@ -456,4 +456,11 @@
     <string name="settings_special_dates_disable_type_message">Questo cancella il calendario “%1$s” ed i suoi eventi. Ogni promemoria o note che erano stati aggiunti saranno persi.</string>
     <string name="settings_special_dates_disable_confirm">Spegni</string>
     <string name="dialog_save">Salva</string>
+    <string name="font_atkinson_hyperlegible">Atkinson Hyperlegible</string>
+    <string name="settings_calendar_reminders_managed_hint">Impostato nelle date speciali dei contatti</string>
+    <string name="special_dates_calendar_birthday">Compleanni</string>
+    <string name="special_dates_calendar_anniversary">Anniversari</string>
+    <string name="special_dates_calendar_custom">Date speciali</string>
+    <string name="special_dates_default_title_birthday">Compleanno di {name} ({year})</string>
+    <string name="special_dates_default_title_anniversary">Anniversario di {name} ({year})</string>
 </resources>

app/src/test/java/de/jeanlucmakiola/calendula/data/calendar/EventWriteMapperTest.kt

@@ -220,6 +220,46 @@ class EventWriteMapperTest {
         assertThat(values).containsEntry(CalendarContract.Events.DESCRIPTION, null)
     }
 
+    // --- buildOccurrenceCancelValues ("delete only this event") ---
+
+    @Test
+    fun `occurrence cancel anchors a single instance and cancels only it`() {
+        val values = buildOccurrenceCancelValues(
+            originalInstanceMillis = 1_700_000_000_000L,
+            dtStartMillis = 1_700_000_000_000L,
+            duration = "P3600S",
+            timezone = "Europe/Berlin",
+            allDay = 0,
+        )
+        assertThat(values[CalendarContract.Events.ORIGINAL_INSTANCE_TIME])
+            .isEqualTo(1_700_000_000_000L)
+        // DTSTART + DURATION make the provider derive a single instance and drop
+        // the inherited RRULE, so only this occurrence is cancelled — not the
+        // whole series (#47). DTEND is never sent (the provider rejects it).
+        assertThat(values[CalendarContract.Events.DTSTART]).isEqualTo(1_700_000_000_000L)
+        assertThat(values[CalendarContract.Events.DURATION]).isEqualTo("P3600S")
+        assertThat(values[CalendarContract.Events.EVENT_TIMEZONE]).isEqualTo("Europe/Berlin")
+        assertThat(values[CalendarContract.Events.STATUS])
+            .isEqualTo(CalendarContract.Events.STATUS_CANCELED)
+        assertThat(values).doesNotContainKey(CalendarContract.Events.DTEND)
+        assertThat(values).doesNotContainKey(CalendarContract.Events.RRULE)
+    }
+
+    @Test
+    fun `all-day occurrence cancel keeps the all-day flag and utc zone`() {
+        val values = buildOccurrenceCancelValues(
+            originalInstanceMillis = 1_700_000_000_000L,
+            dtStartMillis = 1_700_000_000_000L,
+            duration = "P1D",
+            timezone = "UTC",
+            allDay = 1,
+        )
+        assertThat(values[CalendarContract.Events.ALL_DAY]).isEqualTo(1)
+        assertThat(values[CalendarContract.Events.EVENT_TIMEZONE]).isEqualTo("UTC")
+        assertThat(values[CalendarContract.Events.STATUS])
+            .isEqualTo(CalendarContract.Events.STATUS_CANCELED)
+    }
+
     // --- per-event colour ---
 
     @Test

app/src/test/java/de/jeanlucmakiola/calendula/domain/EventColorPaletteTest.kt

@@ -0,0 +1,214 @@
+package de.jeanlucmakiola.calendula.domain
+
+import com.google.common.truth.Truth.assertThat
+import org.junit.jupiter.api.Test
+
+class EventColorPaletteTest {
+
+    @Test
+    fun `empty palette stays empty`() {
+        assertThat(emptyList<EventColorOption>().curatedForPicker()).isEmpty()
+    }
+
+    @Test
+    fun `exact duplicate values collapse to the alphabetically first key`() {
+        val curated = listOf(
+            EventColorOption("cyan", 0xFF00FFFF.toInt()),
+            EventColorOption("aqua", 0xFF00FFFF.toInt()),
+            EventColorOption("red", 0xFFFF0000.toInt()),
+        ).curatedForPicker()
+
+        assertThat(curated.map { it.key }).containsExactly("aqua", "red")
+    }
+
+    @Test
+    fun `small palettes pass through whole, so Google's curated set is untouched`() {
+        // A Google-like palette: two dozen distinct hand-picked colours.
+        val palette = (0 until 24).map {
+            val hue = it * 15
+            EventColorOption("$it", hsvArgb(hue.toFloat()))
+        }
+
+        val curated = palette.curatedForPicker()
+
+        assertThat(curated).containsExactlyElementsIn(palette)
+    }
+
+    @Test
+    fun `oversized CSS3 palette thins to a pickable number of distinct swatches`() {
+        val curated = css3Palette().curatedForPicker()
+
+        // The whole point of #22: ~147 published colours become a single
+        // manageable grid instead of a full screen.
+        assertThat(curated.size).isAtLeast(30)
+        assertThat(curated.size).isAtMost(60)
+    }
+
+    @Test
+    fun `curation never invents colours or drops keys`() {
+        val source = css3Palette()
+        val curated = source.curatedForPicker()
+
+        assertThat(source).containsAtLeastElementsIn(curated)
+        assertThat(curated.map { it.argb }).containsNoDuplicates()
+    }
+
+    @Test
+    fun `spelling-alias pairs never both survive`() {
+        val keys = css3Palette().curatedForPicker().map { it.key }.toSet()
+
+        val aliasPairs = listOf(
+            "aqua" to "cyan",
+            "fuchsia" to "magenta",
+            "gray" to "grey",
+            "darkgray" to "darkgrey",
+            "dimgray" to "dimgrey",
+            "lightgray" to "lightgrey",
+            "slategray" to "slategrey",
+            "lightslategray" to "lightslategrey",
+            "darkslategray" to "darkslategrey",
+        )
+        aliasPairs.forEach { (a, b) ->
+            assertThat(keys.contains(a) && keys.contains(b)).isFalse()
+        }
+    }
+
+    @Test
+    fun `neutrals collapse to one painted tint instead of a run of look-alikes`() {
+        // Black and every gray paint as the same pale swatch (the picker pins
+        // lightness and floors saturation), so only one survives — no stranded
+        // run of look-alike "pinks" at the end of the grid (#22).
+        val curated = listOf(
+            EventColorOption("black", 0xFF000000.toInt()),
+            EventColorOption("gray", 0xFF808080.toInt()),
+            EventColorOption("darkgray", 0xFFA9A9A9.toInt()),
+            EventColorOption("blue", 0xFF0000FF.toInt()),
+            EventColorOption("red", 0xFFFF0000.toInt()),
+        ).curatedForPicker().map { it.key }
+
+        assertThat(curated).containsNoneOf("gray", "darkgray") // folded into black
+        assertThat(curated).containsAtLeast("black", "red", "blue")
+    }
+
+    @Test
+    fun `a dark and a light shade of one hue collapse to a single swatch`() {
+        // The picker paints every swatch at one fixed lightness, so navy and a
+        // mid blue are indistinguishable once painted — keep just one.
+        val curated = listOf(
+            EventColorOption("navy", 0xFF000080.toInt()),
+            EventColorOption("blue", 0xFF0000FF.toInt()),
+        ).curatedForPicker()
+
+        assertThat(curated).hasSize(1)
+    }
+
+    @Test
+    fun `the wheel is cut once, keeping each hue family contiguous`() {
+        // Twelve pure hues, deliberately shuffled; a small palette passes the
+        // thinning stage untouched so only the ordering is under test.
+        val shuffledHues = listOf(0, 300, 60, 180, 120, 240, 30, 330, 90, 210, 150, 270)
+        val curated = shuffledHues
+            .map { EventColorOption("$it", hsvArgb(it.toFloat())) }
+            .curatedForPicker()
+            .map { it.key.toInt() }
+
+        // A proper single-seam sweep around the wheel descends exactly once
+        // (at the seam). The old bucketed sort could scatter a family across
+        // both ends, producing extra descents.
+        val descents = curated.indices.count { i ->
+            curated[(i + 1) % curated.size] < curated[i]
+        }
+        assertThat(descents).isEqualTo(1)
+    }
+
+    @Test
+    fun `CSS3 survivors span the whole rainbow`() {
+        val keys = css3Palette().curatedForPicker().map { it.key }
+        fun has(vararg families: String) = keys.any { k -> families.any { k.contains(it) } }
+
+        // Which exact name represents a hue family depends on the vivid-first
+        // thinning, so assert each family survives, not a specific key.
+        assertThat(has("red", "crimson", "firebrick", "tomato", "maroon", "brown")).isTrue()
+        assertThat(has("orange", "gold", "goldenrod", "peru", "sienna", "salmon")).isTrue()
+        assertThat(has("green", "olive", "lime", "chartreuse", "forest", "sea")).isTrue()
+        assertThat(has("blue", "navy", "dodger", "steel", "royal", "sky", "aqua")).isTrue()
+        assertThat(has("violet", "purple", "magenta", "orchid", "fuchsia", "indigo", "plum")).isTrue()
+    }
+
+    private fun hsvArgb(hue: Float): Int {
+        val h = hue / 60f
+        val sector = h.toInt() % 6
+        val f = h - h.toInt()
+        val q = ((1 - f) * 255).toInt()
+        val t = (f * 255).toInt()
+        return when (sector) {
+            0 -> argb(255, t, 0)
+            1 -> argb(q, 255, 0)
+            2 -> argb(0, 255, t)
+            3 -> argb(0, q, 255)
+            4 -> argb(t, 0, 255)
+            else -> argb(255, 0, q)
+        }
+    }
+
+    private fun argb(r: Int, g: Int, b: Int): Int =
+        (0xFF shl 24) or (r shl 16) or (g shl 8) or b
+
+    /** The exact set ical4android/DAVx5 publishes: CSS3's 147 named colours. */
+    private fun css3Palette(): List<EventColorOption> = CSS3.map { (name, rgb) ->
+        EventColorOption(name, 0xFF000000.toInt() or rgb)
+    }
+
+    private val CSS3 = mapOf(
+        "aliceblue" to 0xF0F8FF, "antiquewhite" to 0xFAEBD7, "aqua" to 0x00FFFF,
+        "aquamarine" to 0x7FFFD4, "azure" to 0xF0FFFF, "beige" to 0xF5F5DC,
+        "bisque" to 0xFFE4C4, "black" to 0x000000, "blanchedalmond" to 0xFFEBCD,
+        "blue" to 0x0000FF, "blueviolet" to 0x8A2BE2, "brown" to 0xA52A2A,
+        "burlywood" to 0xDEB887, "cadetblue" to 0x5F9EA0, "chartreuse" to 0x7FFF00,
+        "chocolate" to 0xD2691E, "coral" to 0xFF7F50, "cornflowerblue" to 0x6495ED,
+        "cornsilk" to 0xFFF8DC, "crimson" to 0xDC143C, "cyan" to 0x00FFFF,
+        "darkblue" to 0x00008B, "darkcyan" to 0x008B8B, "darkgoldenrod" to 0xB8860B,
+        "darkgray" to 0xA9A9A9, "darkgreen" to 0x006400, "darkgrey" to 0xA9A9A9,
+        "darkkhaki" to 0xBDB76B, "darkmagenta" to 0x8B008B, "darkolivegreen" to 0x556B2F,
+        "darkorange" to 0xFF8C00, "darkorchid" to 0x9932CC, "darkred" to 0x8B0000,
+        "darksalmon" to 0xE9967A, "darkseagreen" to 0x8FBC8F, "darkslateblue" to 0x483D8B,
+        "darkslategray" to 0x2F4F4F, "darkslategrey" to 0x2F4F4F, "darkturquoise" to 0x00CED1,
+        "darkviolet" to 0x9400D3, "deeppink" to 0xFF1493, "deepskyblue" to 0x00BFFF,
+        "dimgray" to 0x696969, "dimgrey" to 0x696969, "dodgerblue" to 0x1E90FF,
+        "firebrick" to 0xB22222, "floralwhite" to 0xFFFAF0, "forestgreen" to 0x228B22,
+        "fuchsia" to 0xFF00FF, "gainsboro" to 0xDCDCDC, "ghostwhite" to 0xF8F8FF,
+        "gold" to 0xFFD700, "goldenrod" to 0xDAA520, "gray" to 0x808080,
+        "green" to 0x008000, "greenyellow" to 0xADFF2F, "grey" to 0x808080,
+        "honeydew" to 0xF0FFF0, "hotpink" to 0xFF69B4, "indianred" to 0xCD5C5C,
+        "indigo" to 0x4B0082, "ivory" to 0xFFFFF0, "khaki" to 0xF0E68C,
+        "lavender" to 0xE6E6FA, "lavenderblush" to 0xFFF0F5, "lawngreen" to 0x7CFC00,
+        "lemonchiffon" to 0xFFFACD, "lightblue" to 0xADD8E6, "lightcoral" to 0xF08080,
+        "lightcyan" to 0xE0FFFF, "lightgoldenrodyellow" to 0xFAFAD2, "lightgray" to 0xD3D3D3,
+        "lightgreen" to 0x90EE90, "lightgrey" to 0xD3D3D3, "lightpink" to 0xFFB6C1,
+        "lightsalmon" to 0xFFA07A, "lightseagreen" to 0x20B2AA, "lightskyblue" to 0x87CEFA,
+        "lightslategray" to 0x778899, "lightslategrey" to 0x778899, "lightsteelblue" to 0xB0C4DE,
+        "lightyellow" to 0xFFFFE0, "lime" to 0x00FF00, "limegreen" to 0x32CD32,
+        "linen" to 0xFAF0E6, "magenta" to 0xFF00FF, "maroon" to 0x800000,
+        "mediumaquamarine" to 0x66CDAA, "mediumblue" to 0x0000CD, "mediumorchid" to 0xBA55D3,
+        "mediumpurple" to 0x9370DB, "mediumseagreen" to 0x3CB371, "mediumslateblue" to 0x7B68EE,
+        "mediumspringgreen" to 0x00FA9A, "mediumturquoise" to 0x48D1CC,
+        "mediumvioletred" to 0xC71585, "midnightblue" to 0x191970, "mintcream" to 0xF5FFFA,
+        "mistyrose" to 0xFFE4E1, "moccasin" to 0xFFE4B5, "navajowhite" to 0xFFDEAD,
+        "navy" to 0x000080, "oldlace" to 0xFDF5E6, "olive" to 0x808000,
+        "olivedrab" to 0x6B8E23, "orange" to 0xFFA500, "orangered" to 0xFF4500,
+        "orchid" to 0xDA70D6, "palegoldenrod" to 0xEEE8AA, "palegreen" to 0x98FB98,
+        "paleturquoise" to 0xAFEEEE, "palevioletred" to 0xDB7093, "papayawhip" to 0xFFEFD5,
+        "peachpuff" to 0xFFDAB9, "peru" to 0xCD853F, "pink" to 0xFFC0CB,
+        "plum" to 0xDDA0DD, "powderblue" to 0xB0E0E6, "purple" to 0x800080,
+        "red" to 0xFF0000, "rosybrown" to 0xBC8F8F, "royalblue" to 0x4169E1,
+        "saddlebrown" to 0x8B4513, "salmon" to 0xFA8072, "sandybrown" to 0xF4A460,
+        "seagreen" to 0x2E8B57, "seashell" to 0xFFF5EE, "sienna" to 0xA0522D,
+        "silver" to 0xC0C0C0, "skyblue" to 0x87CEEB, "slateblue" to 0x6A5ACD,
+        "slategray" to 0x708090, "slategrey" to 0x708090, "snow" to 0xFFFAFA,
+        "springgreen" to 0x00FF7F, "steelblue" to 0x4682B4, "tan" to 0xD2B48C,
+        "teal" to 0x008080, "thistle" to 0xD8BFD8, "tomato" to 0xFF6347,
+        "turquoise" to 0x40E0D0, "violet" to 0xEE82EE, "wheat" to 0xF5DEB3,
+        "white" to 0xFFFFFF, "whitesmoke" to 0xF5F5F5, "yellow" to 0xFFFF00,
+        "yellowgreen" to 0x9ACD32,
+    )
+}

fastlane/metadata/android/es-ES/full_description.txt

@@ -0,0 +1,25 @@
+Calendula es una aplicación de calendario moderna y de código abierto
+para Android. Funciona directamente sobre el proveedor de calendario del
+sistema: cualquier origen sincronizado en tu dispositivo — Nextcloud
+mediante DAVx5, Google, calendarios locales, suscripciones WebCal —
+aparece automáticamente, y los cambios que hagas se sincronizan de vuelta
+del mismo modo.
+
+Crea, edita y elimina eventos, incluidos los recurrentes con cambios
+acotados (solo este evento / este y todos los siguientes / toda la serie)
+y un sencillo selector de repetición. Calendula también entrega los
+recordatorios de tus eventos como notificaciones: toca una y estarás en
+el evento.
+
+Si quieres, muestra en tu calendario los cumpleaños, aniversarios y otras
+fechas especiales de tus contactos. Tú mismo lo activas; los contactos se
+leen solo en tu dispositivo, nunca se suben y nunca se modifican —
+Calendula solo refleja las fechas en calendarios locales que controlas
+por completo.
+
+El factor diferenciador es el diseño: auténtico Material 3 Expressive en
+toda la aplicación, con Dynamic Color, movimiento expresivo y formas
+expresivas.
+
+Privacidad: cero telemetría, sin analíticas, sin acceso a la red — tus
+datos nunca salen del dispositivo.

fastlane/metadata/android/es-ES/short_description.txt

@@ -0,0 +1 @@
+Un calendario moderno con Material 3 Expressive para Android.

fastlane/metadata/android/es-ES/title.txt

@@ -0,0 +1 @@
+Calendula

fastlane/metadata/android/it-IT/full_description.txt

@@ -0,0 +1,24 @@
+Calendula è un'app di calendario moderna e open source per Android.
+Funziona direttamente sul provider di calendario di sistema: qualsiasi
+origine sincronizzata sul tuo dispositivo — Nextcloud tramite DAVx5,
+Google, calendari locali, iscrizioni WebCal — compare automaticamente, e
+le modifiche che apporti vengono sincronizzate a ritroso allo stesso
+modo.
+
+Crea, modifica ed elimina eventi, compresi quelli ricorrenti con
+modifiche mirate (solo questo evento / questo e tutti i successivi /
+l'intera serie) e un semplice selettore di ripetizione. Calendula
+recapita anche i promemoria dei tuoi eventi come notifiche: ne tocchi una
+e sei subito sull'evento.
+
+Se vuoi, mostra nel calendario i compleanni, gli anniversari e le altre
+date speciali dei tuoi contatti. Sei tu ad attivarlo; i contatti vengono
+letti solo sul tuo dispositivo, non vengono mai caricati e non vengono
+mai modificati — Calendula si limita a rispecchiare le date in calendari
+locali che controlli completamente.
+
+La differenza sta nel design: vero Material 3 Expressive ovunque, con
+Dynamic Color, animazioni espressive e forme espressive.
+
+Privacy: zero telemetria, nessuna analisi, nessun accesso alla rete — i
+tuoi dati non lasciano mai il dispositivo.

fastlane/metadata/android/it-IT/short_description.txt

@@ -0,0 +1 @@
+Un moderno calendario Material 3 Expressive per Android.

fastlane/metadata/android/it-IT/title.txt

@@ -0,0 +1 @@
+Calendula