feat: make Month week-number a full-height cell like the day cells

Per on-device review, render the week number as a full-height tonal pill
mirroring the day cells' geometry (secondaryContainer tint, same rounded
shape and gap), with the number centred — so the gutter reads as part of the
grid rather than a floating chip. This diverges from the Week view's small
header chip, so revert the shared-badge extraction: restore WeekScreen's
private badge and drop ui/common/WeekNumberBadge.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/src/main/java/de/jeanlucmakiola/calendula/ui/common/WeekNumberBadge.kt

@@ -1,38 +0,0 @@
-package de.jeanlucmakiola.calendula.ui.common
-
-import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.shape.RoundedCornerShape
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Surface
-import androidx.compose.material3.Text
-import androidx.compose.runtime.Composable
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.semantics.contentDescription
-import androidx.compose.ui.semantics.semantics
-import androidx.compose.ui.text.font.FontWeight
-import androidx.compose.ui.unit.dp
-import de.jeanlucmakiola.calendula.R
-
-/**
- * Calendar-week badge — a filled tonal chip with a bold number, deliberately set
- * apart from the surrounding day numbers. Shared by the Week and Month views so
- * the week-of-year indicator reads identically wherever it appears.
- */
-@Composable
-fun WeekNumberBadge(weekNumber: Int, modifier: Modifier = Modifier) {
-    val label = stringResource(R.string.week_number_label)
-    Surface(
-        shape = RoundedCornerShape(8.dp),
-        color = MaterialTheme.colorScheme.secondaryContainer,
-        contentColor = MaterialTheme.colorScheme.onSecondaryContainer,
-        modifier = modifier.semantics { contentDescription = "$label $weekNumber" },
-    ) {
-        Text(
-            text = weekNumber.toString(),
-            style = MaterialTheme.typography.titleSmall,
-            fontWeight = FontWeight.Bold,
-            modifier = Modifier.padding(horizontal = 8.dp, vertical = 3.dp),
-        )
-    }
-}

app/src/main/java/de/jeanlucmakiola/calendula/ui/month/MonthScreen.kt

@@ -73,7 +73,6 @@ import de.jeanlucmakiola.calendula.ui.common.EventDimAlpha
 import de.jeanlucmakiola.calendula.ui.common.LocalDimCutoff
 import de.jeanlucmakiola.calendula.ui.common.rememberCurrentMinute
 import de.jeanlucmakiola.calendula.ui.common.ViewSwitcherPill
-import de.jeanlucmakiola.calendula.ui.common.WeekNumberBadge
 import de.jeanlucmakiola.calendula.ui.common.calendarSlideTransition
 import de.jeanlucmakiola.calendula.ui.common.rememberCalendarFadeSpec
 import de.jeanlucmakiola.calendula.ui.common.rememberReduceMotion
@@ -361,8 +360,8 @@ private fun WeekdayHeader(weekStart: DayOfWeek, showWeekNumbers: Boolean) {
 
 private val EVENT_ROW_HEIGHT = 20.dp
 private val DAY_NUMBER_HEIGHT = 22.dp
-/** Width of the optional left gutter holding the calendar-week badge (#25); wide
+/** Width of the optional left calendar-week gutter (#25); narrow, since it only
- *  enough to seat the shared [WeekNumberBadge] with a little breathing room. */
+ *  seats a one- or two-digit week number in a full-height tonal pill. */
 private val WEEK_NUMBER_GUTTER = 40.dp
 private val DAY_NUMBER_GAP = 4.dp
 private val CELL_TOP_PADDING = 6.dp
@@ -564,10 +563,11 @@ private fun MonthWeekRow(
 }
 
 /**
- * Left-gutter calendar-week indicator (#25), centred vertically in the row. Uses
+ * Left-gutter calendar-week cell (#25): a full-height tonal pill mirroring the
- * the shared [WeekNumberBadge] so it's identical to the Week view's, and computes
+ * day cells' geometry, set apart by the secondaryContainer tint (matching the
- * the ISO week-of-week-based-year on the row's first day — the same basis — so the
+ * Week view's badge), with the ISO week number centred like a day number. The
- * two views always agree.
+ * week is computed on the row's first day — the same basis as the Week view — so
+ * the two agree.
  */
 @Composable
 private fun WeekNumberGutter(weekStart: LocalDate, modifier: Modifier = Modifier) {
@@ -575,11 +575,20 @@ private fun WeekNumberGutter(weekStart: LocalDate, modifier: Modifier = Modifier
         java.time.LocalDate.of(weekStart.year, weekStart.month.ordinal + 1, weekStart.day)
             .get(java.time.temporal.IsoFields.WEEK_OF_WEEK_BASED_YEAR)
     }
+    val label = stringResource(R.string.week_number_label)
     Box(
-        modifier = modifier,
+        modifier = modifier
+            .padding(horizontal = CELL_GAP, vertical = 1.dp)
+            .background(MaterialTheme.colorScheme.secondaryContainer, CELL_SHAPE)
+            .semantics { contentDescription = "$label $weekNumber" },
         contentAlignment = Alignment.Center,
     ) {
-        WeekNumberBadge(weekNumber = weekNumber)
+        Text(
+            text = weekNumber.toString(),
+            style = MaterialTheme.typography.titleSmall,
+            fontWeight = FontWeight.Bold,
+            color = MaterialTheme.colorScheme.onSecondaryContainer,
+        )
     }
 }
 

app/src/main/java/de/jeanlucmakiola/calendula/ui/week/WeekScreen.kt

@@ -87,7 +87,6 @@ import de.jeanlucmakiola.calendula.ui.common.LocalDimCutoff
 import de.jeanlucmakiola.calendula.ui.common.NowLine
 import de.jeanlucmakiola.calendula.ui.common.rememberCurrentMinute
 import de.jeanlucmakiola.calendula.ui.common.ViewSwitcherPill
-import de.jeanlucmakiola.calendula.ui.common.WeekNumberBadge
 import de.jeanlucmakiola.calendula.ui.common.calendarSlideTransition
 import de.jeanlucmakiola.calendula.ui.common.rememberCalendarFadeSpec
 import de.jeanlucmakiola.calendula.ui.common.rememberReduceMotion
@@ -508,6 +507,26 @@ private fun WeekDayHeader(
     }
 }
 
+/** Calendar-week badge shown in the header gutter, deliberately set apart with a
+ *  filled box and bold number. */
+@Composable
+private fun WeekNumberBadge(weekNumber: Int, modifier: Modifier = Modifier) {
+    val label = stringResource(R.string.week_number_label)
+    Surface(
+        shape = RoundedCornerShape(8.dp),
+        color = MaterialTheme.colorScheme.secondaryContainer,
+        contentColor = MaterialTheme.colorScheme.onSecondaryContainer,
+        modifier = modifier.semantics { contentDescription = "$label $weekNumber" },
+    ) {
+        Text(
+            text = weekNumber.toString(),
+            style = MaterialTheme.typography.titleSmall,
+            fontWeight = FontWeight.Bold,
+            modifier = Modifier.padding(horizontal = 8.dp, vertical = 3.dp),
+        )
+    }
+}
+
 @Composable
 private fun AllDayStrip(
     state: WeekUiState.Success,