fix: single branded splash (invisible system icon), December title, first-open lag

- System splash now uses a transparent icon, so there is no system icon that
  shrinks into the in-app splash: just black, then the branded screen (icon +
  Calendarr name + copyright), held until data is loaded
- Month/quarter title uses TextStyle.FULL (format style) with a hard fallback;
  FULL_STANDALONE had the same desugar bug as the LLLL pattern (December showed
  only the year)
- First open: load the full +/- cacheMonths window behind the splash and only
  then reveal, so the app no longer enters mid-load and stutters

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

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

@@ -12,21 +12,30 @@ import java.time.format.TextStyle
 
 private val zone: ZoneId = ZoneId.systemDefault()
 
+/** Localized month name with a hard fallback (guards against empty/numeric results). */
+private fun monthName(date: LocalDate, style: TextStyle, loc: java.util.Locale): String {
+    val name = date.month.getDisplayName(style, loc)
+    val safe = if (name.isBlank() || name.all { it.isDigit() }) {
+        date.month.getDisplayName(TextStyle.FULL, java.util.Locale.ENGLISH)
+    } else {
+        name
+    }
+    return safe.replaceFirstChar { it.uppercase(loc) }
+}
+
 fun titleForView(viewType: CalViewType, date: LocalDate, lang: String): String {
     val loc = L10n.locale(lang)
     return when (viewType) {
         CalViewType.MONTH -> {
-            // Use Month.getDisplayName (robust) instead of the "LLLL" pattern,
-            // which could drop the month name under desugared java.time.
-            val month = date.month.getDisplayName(TextStyle.FULL_STANDALONE, loc)
-                .replaceFirstChar { it.uppercase(loc) }
+            // Use the FORMAT month style (TextStyle.FULL). The standalone style
+            // (FULL_STANDALONE / the "LLLL" pattern) drops the name for some
+            // months under desugared java.time (e.g. December showed only "2026").
+            val month = monthName(date, TextStyle.FULL, loc)
             "$month ${date.year}"
         }
         CalViewType.QUARTER -> {
             val endM = date.plusMonths(2)
-            val m1 = date.month.getDisplayName(TextStyle.SHORT_STANDALONE, loc).replaceFirstChar { it.uppercase(loc) }
-            val m2 = endM.month.getDisplayName(TextStyle.SHORT_STANDALONE, loc).replaceFirstChar { it.uppercase(loc) }
-            "$m1 ${date.year} – $m2 ${endM.year}"
+            "${monthName(date, TextStyle.SHORT, loc)} ${date.year} – ${monthName(endM, TextStyle.SHORT, loc)} ${endM.year}"
         }
         CalViewType.WEEK -> {
             val start = date

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

@@ -64,9 +64,24 @@ class CalendarViewModel @Inject constructor(
     private var allCachedEvents: List<CalEvent> = emptyList()
 
     init {
-        loadVisible()
         loadWritableCalendars()
-        prefetchBackground()
+        initialLoad()
+    }
+
+    /**
+     * Load the full ±cacheMonths window once, behind the splash, and only then
+     * mark ready. Entering the app fully-loaded avoids the first-open jank of
+     * loading a big batch while the user is already scrolling.
+     */
+    private fun initialLoad() {
+        val months = settingsStore.cacheMonths.toLong()
+        val today = LocalDate.now().withDayOfMonth(1)
+        val start = instant(today.minusMonths(months))
+        val end = instant(today.plusMonths(months + 1))
+        viewModelScope.launch {
+            loadRange(start, end, background = false)
+            markReady()
+        }
     }
 
     private fun initialState(): CalendarUiState {
@@ -188,15 +203,6 @@ class CalendarViewModel @Inject constructor(
         _ready.value = true
     }
 
-    private fun prefetchBackground() {
-        val months = settingsStore.cacheMonths
-        val today = LocalDate.now().withDayOfMonth(1)
-        val start = instant(today.minusMonths(months.toLong()))
-        val end = instant(today.plusMonths((months + 1).toLong()))
-        if (isCached(start, end)) return
-        viewModelScope.launch { loadRange(start, end, background = true) }
-    }
-
     private fun isCached(start: Instant, end: Instant): Boolean {
         val cs = cachedStart ?: return false
         val ce = cachedEnd ?: return false
@@ -231,8 +237,7 @@ class CalendarViewModel @Inject constructor(
 
     fun syncWithServer() {
         invalidateCache()
-        loadVisible(force = true)
-        prefetchBackground()
+        initialLoad()
     }
 
     fun clearError() = _state.update { it.copy(error = null) }
@@ -280,8 +285,7 @@ class CalendarViewModel @Inject constructor(
 
     private fun afterMutation() {
         invalidateCache()
-        loadVisible(force = true)
-        prefetchBackground()
+        initialLoad()
     }
 
     fun saveEvent(

app/src/main/res/drawable/splash_transparent.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Invisible system-splash icon: the system splash is just black, so the
+     branded in-app splash (icon + name + copyright) is the only thing seen. -->
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="@android:color/transparent" />
+</shape>

app/src/main/res/values-v31/themes.xml

@@ -4,8 +4,5 @@
         <item name="android:statusBarColor">@android:color/black</item>
         <item name="android:navigationBarColor">@android:color/black</item>
         <item name="android:windowLightStatusBar">false</item>
-        <!-- Android 12+ system splash screen -->
-        <item name="android:windowSplashScreenBackground">@android:color/black</item>
-        <item name="android:windowSplashScreenAnimatedIcon">@drawable/splash_icon</item>
     </style>
 </resources>

app/src/main/res/values/themes.xml

@@ -9,10 +9,11 @@
         <item name="android:windowLightStatusBar">false</item>
     </style>
 
-    <!-- System splash (core-splashscreen); covers the window from frame 0. -->
+    <!-- System splash (core-splashscreen): plain black with an invisible icon,
+         so the only branded screen the user sees is the in-app splash. -->
     <style name="Theme.Calendarr.Starting" parent="Theme.SplashScreen">
         <item name="windowSplashScreenBackground">@android:color/black</item>
-        <item name="windowSplashScreenAnimatedIcon">@drawable/splash_icon</item>
+        <item name="windowSplashScreenAnimatedIcon">@drawable/splash_transparent</item>
         <item name="postSplashScreenTheme">@style/Theme.Calendarr</item>
     </style>
 </resources>