spinner feedback to ui

lib/widgets/home_filter_widget_card.dart

@@ -23,6 +23,8 @@ class HomeFilterWidgetCard extends StatelessWidget {
     this.onToggleDisplay,
     this.onEdit,
     this.dragHandle,
+    this.precomputedStats,
+    this.precomputedBudget,
   });
 
   final HomeFilterWidget widgetConfig;
@@ -31,6 +33,10 @@ class HomeFilterWidgetCard extends StatelessWidget {
   final VoidCallback? onEdit;
   final Widget? dragHandle;
 
+  /// When set, skips scanning all transactions in build.
+  final TxFilterMetrics? precomputedStats;
+  final HomeBudgetMetrics? precomputedBudget;
+
   void _openTransactions(BuildContext context) {
     final filter = widgetConfig.filter;
     Navigator.of(context).push(
@@ -95,12 +101,14 @@ class HomeFilterWidgetCard extends StatelessWidget {
                           currency: currency,
                           transactions: bank.transactions,
                           meta: meta,
+                          precomputed: precomputedBudget,
                         )
                       : _StatsBody(
                           widgetConfig: widgetConfig,
                           currency: currency,
                           transactions: bank.transactions,
                           meta: meta,
+                          precomputed: precomputedStats,
                         ),
                 ),
                 if (editing && onToggleDisplay != null)
@@ -267,22 +275,25 @@ class _StatsBody extends StatelessWidget {
     required this.currency,
     required this.transactions,
     required this.meta,
+    this.precomputed,
   });
 
   final HomeFilterWidget widgetConfig;
   final String currency;
   final List<BankTransaction> transactions;
   final TxMetaController meta;
+  final TxFilterMetrics? precomputed;
 
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
     final colors = theme.colorScheme;
-    final metrics = computeTxFilterMetrics(
-      all: transactions,
-      meta: meta,
-      filter: widgetConfig.filter,
-    );
+    final metrics = precomputed ??
+        computeTxFilterMetrics(
+          all: transactions,
+          meta: meta,
+          filter: widgetConfig.filter,
+        );
 
     // Prefer a single hero "Spent" figure when that's the main metric.
     final spentOnly = widgetConfig.showAmountOut &&
@@ -383,22 +394,25 @@ class _BudgetBody extends StatelessWidget {
     required this.currency,
     required this.transactions,
     required this.meta,
+    this.precomputed,
   });
 
   final HomeFilterWidget widgetConfig;
   final String currency;
   final List<BankTransaction> transactions;
   final TxMetaController meta;
+  final HomeBudgetMetrics? precomputed;
 
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
     final colors = theme.colorScheme;
-    final budget = computeHomeBudgetMetrics(
-      all: transactions,
-      meta: meta,
-      widget: widgetConfig,
-    );
+    final budget = precomputed ??
+        computeHomeBudgetMetrics(
+          all: transactions,
+          meta: meta,
+          widget: widgetConfig,
+        );
     final progress = budget.progress.clamp(0.0, 1.0);
     final fillColor = budget.overBudget
         ? AppTheme.expense