Android overhaul: the §9.6 text and date limits in :core:design's Limits.kt

DESCRIPTION_MAX (S-7 and S-19 each had 100), NOTES_MAX (S-7's 1000 and NotesField's private copy), FIRST_DATE and
DAYS_AHEAD_MAX (the S-7 and S-9 date pickers each spelled 2000-01-01 and 365). Values unchanged.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TQd3pEP9UeN2uifbHknQ7B

android/core/design/src/main/kotlin/se/hagstedt/kvitt/design/component/Editor.kt

@@ -22,9 +22,9 @@ import androidx.compose.foundation.selection.selectable
 import androidx.compose.foundation.selection.selectableGroup
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.material3.Icon
+import androidx.compose.material3.LocalContentColor
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
-import androidx.compose.material3.LocalContentColor
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.getValue
@@ -52,10 +52,10 @@ import androidx.compose.ui.semantics.testTag
 import androidx.compose.ui.text.SpanStyle
 import androidx.compose.ui.text.buildAnnotatedString
 import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.input.ImeAction
 import androidx.compose.ui.text.rememberTextMeasurer
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.style.TextOverflow
-import androidx.compose.ui.text.input.ImeAction
 import androidx.compose.ui.text.withStyle
 import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
@@ -65,6 +65,7 @@ import se.hagstedt.kvitt.design.format.AmountKey
 import se.hagstedt.kvitt.design.format.DateFormatter
 import se.hagstedt.kvitt.design.format.KvittLanguage
 import se.hagstedt.kvitt.design.format.MoneyFormatter
+import se.hagstedt.kvitt.design.format.NOTES_MAX
 import se.hagstedt.kvitt.design.icon.CheckBadgeIcon
 import se.hagstedt.kvitt.design.icon.KvittIcon
 import se.hagstedt.kvitt.design.theme.KvittDimens
@@ -255,7 +256,7 @@ fun CategoryQuickRow(categories: List<Category>, selected: CategoryId?, onPick:
 
 /**
  * One category item of the quick row or the grid sheet. The check badge of a selected item overhangs the tile's top-right
- * corner; it is drawn in a layer above the clipped, clickable item so the item's ripple clip never cuts it (M8b).
+ * corner; it is drawn in a layer above the clipped, clickable item so the item's ripple clip never cuts it.
  */
 @Composable
 fun CategoryItem(category: Category, selected: Boolean, onClick: () -> Unit, modifier: Modifier = Modifier) {
@@ -636,7 +637,6 @@ fun NotesField(value: String, onValueChange: (String) -> Unit, expanded: Boolean
     )
 }
 
-private const val NOTES_MAX = 1000
 
 /**
  * The compact row pinned under the app bar when the amount has scrolled away (design-spec §3.7): tile 36,

android/core/design/src/main/kotlin/se/hagstedt/kvitt/design/format/Limits.kt

@@ -1,7 +1,21 @@
 package se.hagstedt.kvitt.design.format
 
+import kotlinx.datetime.LocalDate
+
 /** Basis points of a whole: a ratio's per-user shares sum to 10000 bp, 100 % (SPEC §1, §9.3). */
 const val BP_TOTAL = 10_000
 
 /** A user's display name is 1 to 40 code points after trimming (SPEC §9.6). */
 const val DISPLAY_NAME_MAX = 40
+
+/** An expense's or recurring template's description is 1 to 100 code points (SPEC §9.6). */
+const val DESCRIPTION_MAX = 100
+
+/** An expense's notes are 0 to 1000 code points (SPEC §9.6). */
+const val NOTES_MAX = 1000
+
+/** The earliest expense or settlement date (SPEC §9.6). */
+val FIRST_DATE: LocalDate = LocalDate(2000, 1, 1)
+
+/** The latest expense or settlement date is today plus this many days (SPEC §9.6). */
+const val DAYS_AHEAD_MAX = 365

android/feature/expense/src/main/kotlin/se/hagstedt/kvitt/feature/expense/ExpenseEditorScreen.kt

@@ -55,7 +55,6 @@ import kotlinx.datetime.DateTimeUnit
 import kotlinx.datetime.LocalDate
 import kotlinx.datetime.plus
 import se.hagstedt.kvitt.design.KvittTheme
-import se.hagstedt.kvitt.core.design.R as DesignR
 import se.hagstedt.kvitt.design.component.AccountPicker
 import se.hagstedt.kvitt.design.component.AmountDisplay
 import se.hagstedt.kvitt.design.component.AmountKeypad
@@ -90,6 +89,10 @@ import se.hagstedt.kvitt.design.component.splitOption
 import se.hagstedt.kvitt.design.component.viewerPercentOf
 import se.hagstedt.kvitt.design.format.AmountInput
 import se.hagstedt.kvitt.design.format.AmountKey
+import se.hagstedt.kvitt.design.format.DAYS_AHEAD_MAX
+import se.hagstedt.kvitt.design.format.DESCRIPTION_MAX
+import se.hagstedt.kvitt.design.format.FIRST_DATE
+import se.hagstedt.kvitt.design.format.NOTES_MAX
 import se.hagstedt.kvitt.design.icon.KvittIcon
 import se.hagstedt.kvitt.model.AccountId
 import se.hagstedt.kvitt.model.CategoryId
@@ -97,6 +100,7 @@ import se.hagstedt.kvitt.model.ExpenseId
 import se.hagstedt.kvitt.model.FieldError
 import se.hagstedt.kvitt.model.SplitMode
 import se.hagstedt.kvitt.model.UserId
+import se.hagstedt.kvitt.core.design.R as DesignR
 
 /** What S-7 can ask its state holder to do; [ExpenseEditorViewModel] implements it. */
 interface ExpenseEditorActions {
@@ -400,8 +404,8 @@ private fun EditorDatePicker(date: String, today: String, actions: ExpenseEditor
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 private fun LocalizedDatePicker(date: String, today: String, actions: ExpenseEditorActions, inline: Boolean) {
-    val first = remember { LocalDate(FIRST_YEAR, 1, 1).toEpochDays() * DAY_MILLIS }
+    val first = remember { FIRST_DATE.toEpochDays() * DAY_MILLIS }
-    val last = remember(today) { LocalDate.parse(today).plus(MAX_DAYS_AHEAD, DateTimeUnit.DAY).toEpochDays() * DAY_MILLIS }
+    val last = remember(today) { LocalDate.parse(today).plus(DAYS_AHEAD_MAX, DateTimeUnit.DAY).toEpochDays() * DAY_MILLIS }
     val picker = rememberDatePickerState(
         initialSelectedDateMillis = LocalDate.parse(date).toEpochDays() * DAY_MILLIS,
         selectableDates = object : SelectableDates {
@@ -479,9 +483,9 @@ internal fun errorText(errors: List<FieldError>, field: String): String? {
         }
         ExpenseEditorViewModel.FIELD_DESCRIPTION -> when (error.error) {
             ExpenseEditorViewModel.REQUIRED -> stringResource(DesignR.string.error_description_required)
-            else -> pluralStringResource(DesignR.plurals.error_too_long, MAX_DESCRIPTION, MAX_DESCRIPTION)
+            else -> pluralStringResource(DesignR.plurals.error_too_long, DESCRIPTION_MAX, DESCRIPTION_MAX)
         }
-        ExpenseEditorViewModel.FIELD_NOTES -> pluralStringResource(DesignR.plurals.error_too_long, MAX_NOTES, MAX_NOTES)
+        ExpenseEditorViewModel.FIELD_NOTES -> pluralStringResource(DesignR.plurals.error_too_long, NOTES_MAX, NOTES_MAX)
         ExpenseEditorViewModel.FIELD_DATE -> stringResource(DesignR.string.error_date_out_of_range)
         ExpenseEditorViewModel.FIELD_SPLIT -> when (error.error) {
             "exact_sum_mismatch", "exact_negative" -> stringResource(DesignR.string.error_exact_share_too_large)
@@ -495,8 +499,4 @@ internal fun errorText(errors: List<FieldError>, field: String): String? {
 private const val PERCENT_HUNDREDTHS = 100L
 private const val HALF = 50
 private const val MIN_AMOUNT_ORE = 1L
-private const val MAX_DESCRIPTION = 100
-private const val MAX_NOTES = 1000
-private const val FIRST_YEAR = 2000
-private const val MAX_DAYS_AHEAD = 365
 private const val DAY_MILLIS = 86_400_000L

android/feature/settings/src/main/kotlin/se/hagstedt/kvitt/feature/settings/recurring/RecurringEditorScreen.kt

@@ -77,6 +77,7 @@ import se.hagstedt.kvitt.design.component.splitOption
 import se.hagstedt.kvitt.design.format.AmountInput
 import se.hagstedt.kvitt.design.format.AmountKey
 import se.hagstedt.kvitt.design.format.BP_TOTAL
+import se.hagstedt.kvitt.design.format.DESCRIPTION_MAX
 import se.hagstedt.kvitt.design.format.DateFormatter
 import se.hagstedt.kvitt.design.format.KvittLanguage
 import se.hagstedt.kvitt.design.icon.KvittIcon

android/feature/settings/src/main/kotlin/se/hagstedt/kvitt/feature/settings/recurring/RecurringForm.kt

@@ -4,6 +4,7 @@ import se.hagstedt.kvitt.design.component.RatioField
 import se.hagstedt.kvitt.design.format.AmountInput
 import se.hagstedt.kvitt.design.format.AmountKey
 import se.hagstedt.kvitt.design.format.BP_TOTAL
+import se.hagstedt.kvitt.design.format.DESCRIPTION_MAX
 import se.hagstedt.kvitt.model.AccountId
 import se.hagstedt.kvitt.model.CategoryId
 import se.hagstedt.kvitt.model.ExpenseDraft
@@ -16,9 +17,6 @@ import se.hagstedt.kvitt.model.UserId
 /** Which keypad field has focus (design-spec §3.7: the keypad drives the amount, the exact share and the percents). */
 enum class EditorFocus { None, Amount, RatioViewer, RatioPartner, Exact }
 
-/** §9.6: description 1 to 100, notes 0 to 1000 code points. */
-const val DESCRIPTION_MAX = 100
-
 /**
  * The S-19 editor's input, independent of the repositories: the expense fields of S-7 without the date (D-019) plus
  * the schedule of FR-9. Pure, so the editor's rules are unit-tested without Android.

android/feature/settle/src/main/kotlin/se/hagstedt/kvitt/feature/settle/SettleScreen.kt

@@ -40,7 +40,6 @@ import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import kotlinx.datetime.DateTimeUnit
 import kotlinx.datetime.LocalDate
 import kotlinx.datetime.plus
-import se.hagstedt.kvitt.core.design.R as DesignR
 import se.hagstedt.kvitt.design.KvittTheme
 import se.hagstedt.kvitt.design.component.AccountTile
 import se.hagstedt.kvitt.design.component.AllocationRow
@@ -69,20 +68,21 @@ import se.hagstedt.kvitt.design.component.TopBarNavigation
 import se.hagstedt.kvitt.design.component.detailDate
 import se.hagstedt.kvitt.design.component.kvittLanguage
 import se.hagstedt.kvitt.design.component.money
+import se.hagstedt.kvitt.design.format.DAYS_AHEAD_MAX
 import se.hagstedt.kvitt.design.format.DateFormatter
+import se.hagstedt.kvitt.design.format.FIRST_DATE
 import se.hagstedt.kvitt.design.format.MoneyFormatter
 import se.hagstedt.kvitt.design.icon.KvittIcon
 import se.hagstedt.kvitt.design.theme.KvittDimens
 import se.hagstedt.kvitt.model.Account
 import se.hagstedt.kvitt.model.FieldError
 import se.hagstedt.kvitt.model.User
+import se.hagstedt.kvitt.core.design.R as DesignR
 
 /** §9.6: the longest settlement note, in code points. */
 private const val NOTE_MAX = 200
 
-/** §9.6: dates from 2000-01-01 to today + 365 days. */
+/** The date picker counts in UTC milliseconds; dates run from [FIRST_DATE] to today + [DAYS_AHEAD_MAX] days (§9.6). */
-private val FIRST_DATE = LocalDate(2000, 1, 1)
-private const val DAYS_AHEAD = 365
 private const val MILLIS_PER_DAY = 86_400_000L
 
 /**
@@ -440,7 +440,7 @@ private fun AddAccountRow(account: Account, colorIndex: Int, onClick: () -> Unit
 @Composable
 private fun SettleDatePicker(isoDate: String, actions: SettleActions) {
     val today = LocalKvittClock.current.today
-    val last = today.plus(DAYS_AHEAD, DateTimeUnit.DAY)
+    val last = today.plus(DAYS_AHEAD_MAX, DateTimeUnit.DAY)
     val selectable = remember(today) {
         object : SelectableDates {
             override fun isSelectableDate(utcTimeMillis: Long): Boolean {