data: add CalendarContract column projections + indices

Inspection of the local Hetzner-synced F-Droid repo after v0.1.0
revealed that fdroidserver only partially picked up Calendula's
metadata: summary was sourced from the YAML fallback (en-US only),
description appeared only for the "de" locale (not de-DE), and no
icon was shown anywhere. Root cause: we wrote Google Play conventions
(short_description.txt, full_description.txt, bare locale code "de")
where fdroidserver expects the fastlane format that the sibling
HouseHoldKeaper repo already uses successfully.

Changes:
- de/ -> de-DE/ (BCP-47 with region matches HHK and is more reliably
  parsed by fdroidserver)
- short_description.txt -> summary.txt
- full_description.txt -> description.txt
- Add icon.png (512x512) per locale, composed from the adaptive icon's
  foreground path + slate background (rendered via rsvg-convert).
  Required because XML-only adaptive icons in the APK aren't
  auto-rasterized by fdroidserver.

Verified locally against the previously-broken index by composing the
new icon and renaming the files in-tree.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -7,6 +7,26 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.1.1] — 2026-06-08
+
+### Fixed
+- F-Droid metadata format: renamed locale dirs from `de/` to `de-DE/`,
+  `short_description.txt` to `summary.txt`, `full_description.txt` to
+  `description.txt` (fastlane format that fdroidserver actually reads,
+  matching the working HouseHoldKeaper convention)
+- Added `icon.png` (512x512) per locale; fdroidserver does NOT
+  auto-extract icons from APKs that only contain XML adaptive icons
+  (which is what minSdk-29 apps produce), so the app was rendered
+  blank-iconed in F-Droid clients
+
+### Changed
+- CI pipeline cleanup: `lintDebug`/`testDebugUnitTest` instead of full
+  `lint`/`test` (cuts ~50% of lint work since release variant lint is
+  redundant for V1 single-variant build)
+- Release workflow drops the lint step from its CI-sanity job since
+  the same lint already ran via `ci.yaml` when the underlying commit
+  hit main
+
 ## [0.1.0] — 2026-06-08
 
 ### Added

app/build.gradle.kts

@@ -74,7 +74,10 @@ android {
     }
 
     testOptions {
-        unitTests.all { it.useJUnitPlatform() }
+        unitTests {
+            all { it.useJUnitPlatform() }
+            isReturnDefaultValues = true
+        }
     }
 }
 
@@ -87,6 +90,7 @@ kotlin {
 dependencies {
     implementation(libs.androidx.core.ktx)
     implementation(libs.androidx.lifecycle.runtime.ktx)
+    implementation(libs.androidx.lifecycle.runtime.compose)
     implementation(libs.androidx.activity.compose)
 
     implementation(platform(libs.androidx.compose.bom))
@@ -96,10 +100,14 @@ dependencies {
     implementation(libs.androidx.material3)
 
     implementation(libs.hilt.android)
+    implementation(libs.androidx.hilt.navigation.compose)
     ksp(libs.hilt.compiler)
 
     implementation(libs.androidx.datastore.preferences)
 
+    implementation(libs.kotlinx.datetime)
+    implementation(libs.kotlinx.coroutines.core)
+
     debugImplementation(libs.androidx.ui.tooling)
     debugImplementation(libs.androidx.ui.test.manifest)
 
@@ -107,9 +115,12 @@ dependencies {
     testRuntimeOnly(libs.junit.jupiter.engine)
     testRuntimeOnly(libs.junit.platform.launcher)
     testImplementation(libs.truth)
+    testImplementation(libs.turbine)
+    testImplementation(libs.kotlinx.coroutines.test)
 
     androidTestImplementation(libs.androidx.junit)
     androidTestImplementation(libs.androidx.espresso.core)
+    androidTestImplementation(libs.androidx.test.rules)
     androidTestImplementation(platform(libs.androidx.compose.bom))
     androidTestImplementation(libs.androidx.ui.test.junit4)
 }

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

@@ -0,0 +1,94 @@
+package de.jeanlucmakiola.calendula.data.calendar
+
+import android.provider.CalendarContract
+
+internal object CalendarProjection {
+    val COLUMNS: Array<String> = arrayOf(
+        CalendarContract.Calendars._ID,
+        CalendarContract.Calendars.CALENDAR_DISPLAY_NAME,
+        CalendarContract.Calendars.ACCOUNT_NAME,
+        CalendarContract.Calendars.ACCOUNT_TYPE,
+        CalendarContract.Calendars.CALENDAR_COLOR,
+        CalendarContract.Calendars.VISIBLE,
+    )
+
+    const val IDX_ID = 0
+    const val IDX_DISPLAY_NAME = 1
+    const val IDX_ACCOUNT_NAME = 2
+    const val IDX_ACCOUNT_TYPE = 3
+    const val IDX_COLOR = 4
+    const val IDX_VISIBLE = 5
+}
+
+internal object InstanceProjection {
+    val COLUMNS: Array<String> = arrayOf(
+        CalendarContract.Instances._ID,
+        CalendarContract.Instances.EVENT_ID,
+        CalendarContract.Instances.CALENDAR_ID,
+        CalendarContract.Instances.TITLE,
+        CalendarContract.Instances.BEGIN,
+        CalendarContract.Instances.END,
+        CalendarContract.Instances.ALL_DAY,
+        CalendarContract.Instances.EVENT_COLOR,
+        CalendarContract.Instances.CALENDAR_COLOR,
+        CalendarContract.Instances.EVENT_LOCATION,
+    )
+
+    const val IDX_INSTANCE_ID = 0
+    const val IDX_EVENT_ID = 1
+    const val IDX_CALENDAR_ID = 2
+    const val IDX_TITLE = 3
+    const val IDX_BEGIN = 4
+    const val IDX_END = 5
+    const val IDX_ALL_DAY = 6
+    const val IDX_EVENT_COLOR = 7
+    const val IDX_CALENDAR_COLOR = 8
+    const val IDX_LOCATION = 9
+}
+
+internal object EventDetailProjection {
+    val COLUMNS: Array<String> = arrayOf(
+        CalendarContract.Events._ID,
+        CalendarContract.Events.TITLE,
+        CalendarContract.Events.DESCRIPTION,
+        CalendarContract.Events.ORGANIZER,
+        CalendarContract.Events.RRULE,
+        CalendarContract.Events.EVENT_COLOR,
+        CalendarContract.Events.CALENDAR_COLOR,
+        CalendarContract.Events.DTSTART,
+        CalendarContract.Events.DTEND,
+        CalendarContract.Events.ALL_DAY,
+        CalendarContract.Events.EVENT_LOCATION,
+        CalendarContract.Events.CALENDAR_ID,
+    )
+
+    const val IDX_EVENT_ID = 0
+    const val IDX_TITLE = 1
+    const val IDX_DESCRIPTION = 2
+    const val IDX_ORGANIZER = 3
+    const val IDX_RRULE = 4
+    const val IDX_EVENT_COLOR = 5
+    const val IDX_CALENDAR_COLOR = 6
+    const val IDX_DTSTART = 7
+    const val IDX_DTEND = 8
+    const val IDX_ALL_DAY = 9
+    const val IDX_LOCATION = 10
+    const val IDX_CALENDAR_ID = 11
+}
+
+internal object AttendeeProjection {
+    val COLUMNS: Array<String> = arrayOf(
+        CalendarContract.Attendees.ATTENDEE_NAME,
+        CalendarContract.Attendees.ATTENDEE_EMAIL,
+        CalendarContract.Attendees.ATTENDEE_STATUS,
+    )
+
+    const val IDX_NAME = 0
+    const val IDX_EMAIL = 1
+    const val IDX_STATUS = 2
+}
+
+internal object Fallbacks {
+    const val UNNAMED_CALENDAR = "(Unbenannter Kalender)"
+    const val UNTITLED_EVENT = "(Ohne Titel)"
+}

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

@@ -0,0 +1,7 @@
+package de.jeanlucmakiola.calendula.data.calendar
+
+import kotlin.time.Instant
+
+fun Long.toKotlinInstantFromEpochMillis(): Instant = Instant.fromEpochMilliseconds(this)
+
+fun Instant.toEpochMillis(): Long = toEpochMilliseconds()

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

@@ -0,0 +1,54 @@
+package de.jeanlucmakiola.calendula.domain
+
+import kotlin.time.Instant
+
+data class CalendarSource(
+    val id: Long,
+    val displayName: String,
+    val accountName: String,
+    val accountType: String,
+    val color: Int,
+    val isVisibleInSystem: Boolean,
+)
+
+data class EventInstance(
+    val instanceId: Long,
+    val eventId: Long,
+    val calendarId: Long,
+    val title: String,
+    val start: Instant,
+    val end: Instant,
+    val isAllDay: Boolean,
+    val color: Int,
+    val location: String?,
+)
+
+data class EventDetail(
+    val instance: EventInstance,
+    val description: String?,
+    val organizer: String?,
+    val attendees: List<Attendee>,
+    val rrule: String?,
+)
+
+data class Attendee(
+    val name: String,
+    val email: String?,
+    val status: AttendeeStatus,
+)
+
+enum class AttendeeStatus {
+    Accepted,
+    Declined,
+    Tentative,
+    NeedsAction,
+    Unknown,
+}
+
+enum class FailureReason {
+    PermissionRevoked,
+    NoCalendarsConfigured,
+    ProviderUnavailable,
+    EventNotFound,
+    Unknown,
+}

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

@@ -0,0 +1,26 @@
+package de.jeanlucmakiola.calendula.data.calendar
+
+import com.google.common.truth.Truth.assertThat
+import kotlin.time.Instant
+import org.junit.jupiter.api.Test
+
+class TimeBridgeTest {
+
+    @Test
+    fun `epoch millis round-trips through Instant`() {
+        val original = 1_717_840_800_000L // 2024-06-08T10:00:00Z
+        val instant = original.toKotlinInstantFromEpochMillis()
+        assertThat(instant.toEpochMillis()).isEqualTo(original)
+    }
+
+    @Test
+    fun `zero millis maps to Instant epoch`() {
+        assertThat(0L.toKotlinInstantFromEpochMillis()).isEqualTo(Instant.fromEpochMilliseconds(0L))
+    }
+
+    @Test
+    fun `negative epoch millis is supported`() {
+        val original = -1_000_000L
+        assertThat(original.toKotlinInstantFromEpochMillis().toEpochMillis()).isEqualTo(original)
+    }
+}

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

@@ -0,0 +1,74 @@
+package de.jeanlucmakiola.calendula.domain
+
+import com.google.common.truth.Truth.assertThat
+import kotlin.time.Instant
+import org.junit.jupiter.api.Test
+
+class ModelsTest {
+
+    @Test
+    fun `CalendarSource is a data class with structural equality`() {
+        val a = CalendarSource(1L, "Work", "x@y", "com.google", 0xFF112233.toInt(), true)
+        val b = CalendarSource(1L, "Work", "x@y", "com.google", 0xFF112233.toInt(), true)
+        assertThat(a).isEqualTo(b)
+    }
+
+    @Test
+    fun `EventInstance is a data class with structural equality`() {
+        val start = Instant.fromEpochMilliseconds(0L)
+        val end = Instant.fromEpochMilliseconds(3_600_000L)
+        val a = EventInstance(10L, 1L, 1L, "Meet", start, end, false, 0xFF000000.toInt(), null)
+        val b = EventInstance(10L, 1L, 1L, "Meet", start, end, false, 0xFF000000.toInt(), null)
+        assertThat(a).isEqualTo(b)
+    }
+
+    @Test
+    fun `AttendeeStatus enum has all five variants`() {
+        assertThat(AttendeeStatus.values().toSet()).isEqualTo(
+            setOf(
+                AttendeeStatus.Accepted,
+                AttendeeStatus.Declined,
+                AttendeeStatus.Tentative,
+                AttendeeStatus.NeedsAction,
+                AttendeeStatus.Unknown,
+            )
+        )
+    }
+
+    @Test
+    fun `FailureReason enum has all five variants`() {
+        assertThat(FailureReason.values().toSet()).isEqualTo(
+            setOf(
+                FailureReason.PermissionRevoked,
+                FailureReason.NoCalendarsConfigured,
+                FailureReason.ProviderUnavailable,
+                FailureReason.EventNotFound,
+                FailureReason.Unknown,
+            )
+        )
+    }
+
+    @Test
+    fun `EventDetail composes EventInstance plus extras`() {
+        val instance = EventInstance(
+            instanceId = 10L,
+            eventId = 1L,
+            calendarId = 1L,
+            title = "Meet",
+            start = Instant.fromEpochMilliseconds(0L),
+            end = Instant.fromEpochMilliseconds(60_000L),
+            isAllDay = false,
+            color = 0xFFAABBCC.toInt(),
+            location = null,
+        )
+        val detail = EventDetail(
+            instance = instance,
+            description = "Brief description",
+            organizer = "x@y",
+            attendees = listOf(Attendee("Alice", "alice@x", AttendeeStatus.Accepted)),
+            rrule = "FREQ=WEEKLY",
+        )
+        assertThat(detail.instance.title).isEqualTo("Meet")
+        assertThat(detail.attendees).hasSize(1)
+    }
+}

gradle/libs.versions.toml

@@ -17,6 +17,12 @@ junitPlatform = "6.1.0"
 truth = "1.4.5"
 androidxJunit = "1.3.0"
 espressoCore = "3.7.0"
+kotlinxDatetime = "0.7.0"
+kotlinxCoroutines = "1.10.2"
+turbine = "1.2.0"
+hiltNavigationCompose = "1.3.0"
+lifecycleCompose = "2.10.0"
+androidxTestRules = "1.7.0"
 
 [libraries]
 # AndroidX core
@@ -53,6 +59,25 @@ truth = { group = "com.google.truth", name = "truth", version.ref = "truth" }
 androidx-junit = { group = "androidx.test.ext", name = "junit", version.ref = "androidxJunit" }
 androidx-espresso-core = { group = "androidx.test.espresso", name = "espresso-core", version.ref = "espressoCore" }
 
+# Domain time
+kotlinx-datetime = { group = "org.jetbrains.kotlinx", name = "kotlinx-datetime", version.ref = "kotlinxDatetime" }
+
+# Coroutines (transitively pulled by hilt-android, pinned explicit)
+kotlinx-coroutines-core = { group = "org.jetbrains.kotlinx", name = "kotlinx-coroutines-core", version.ref = "kotlinxCoroutines" }
+kotlinx-coroutines-test = { group = "org.jetbrains.kotlinx", name = "kotlinx-coroutines-test", version.ref = "kotlinxCoroutines" }
+
+# Test - Flow assertions
+turbine = { group = "app.cash.turbine", name = "turbine", version.ref = "turbine" }
+
+# Hilt navigation-compose (for hiltViewModel() in Composables)
+androidx-hilt-navigation-compose = { group = "androidx.hilt", name = "hilt-navigation-compose", version.ref = "hiltNavigationCompose" }
+
+# Lifecycle compose (for collectAsStateWithLifecycle)
+androidx-lifecycle-runtime-compose = { group = "androidx.lifecycle", name = "lifecycle-runtime-compose", version.ref = "lifecycleCompose" }
+
+# Android tests - GrantPermissionRule
+androidx-test-rules = { group = "androidx.test", name = "rules", version.ref = "androidxTestRules" }
+
 [plugins]
 android-application = { id = "com.android.application", version.ref = "agp" }
 kotlin-compose = { id = "org.jetbrains.kotlin.plugin.compose", version.ref = "kotlin" }