M6b: core:design fixes after the M7 wave

Bugs: viewerPercentOf reads basis points (Samples in bp); FullSplitPicker and the
split labels use editor_split_full_on_you ("Allt på dig"); AmountInput.of restores
money with both decimals (AmountInput.percent for ratio fields), replacing M7c's
moneyInput; quickRowCategories does the D-060 fill itself; KvittScaffold resolves
resource-backed snackbars (showKvittSnackbar) while shown.

Gaps: ConfirmDialog optional and styled body; KvittButton loading form (M7a uses it,
ProgressBottomButton removed); InviteCodeField wraps after a group, placeholder,
imeAction; EmptyState icon tile and actionEnabled; DateFormatter.monthName and
dayRangeLong; AnalyticsFilterBar periodOwnRow; segmentedItem builder; screen tokens
in KvittDimens (OnboardingDimens removed); common_ok, common_undo; module-proposed
keys recorded in strings.csv; quick-row labels end in an ellipsis on line two.

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

android/feature/account/src/main/kotlin/se/hagstedt/kvitt/feature/account/AccountEditorScreen.kt

@@ -131,7 +131,7 @@ fun AccountEditorContent(ui: AccountEditorUi, actions: AccountEditorActions, mod
             ConfirmDialog(
                 icon = KvittIcon.Delete,
                 title = stringResource(DesignR.string.common_discard_title),
-                body = "",
+                body = null,
                 confirm = stringResource(DesignR.string.common_discard),
                 dismiss = stringResource(DesignR.string.common_keep_editing),
                 onConfirm = actions.onDiscard,