feat(App): update Finlytic Flutter app UI and blocs

FinlyticApp/lib/core/utils/formatters.dart

@@ -0,0 +1,43 @@
+import 'package:intl/intl.dart';
+
+/// Formatting utility helpers for currency, percentages, dates, and numbers.
+class Formatters {
+  static final NumberFormat _currencyFormat = NumberFormat.currency(symbol: '\$', decimalDigits: 2);
+  static final NumberFormat _percentFormat = NumberFormat.decimalPercentPattern(decimalDigits: 2);
+
+  /// Formats currency values (e.g., $1,234.56).
+  static String formatCurrency(double? value, {String symbol = '\$'}) {
+    if (value == null) return '-';
+    if (symbol == '\$') return _currencyFormat.format(value);
+    return NumberFormat.currency(symbol: symbol, decimalDigits: 2).format(value);
+  }
+
+  /// Formats percentage value with sign (e.g. +3.45%).
+  static String formatPercent(double? value) {
+    if (value == null) return '0.00%';
+    final formatted = _percentFormat.format(value / 100);
+    return value >= 0 ? '+$formatted' : formatted;
+  }
+
+  /// Formats compact numbers (e.g. 1.2M, 3.4B).
+  static String formatCompactNumber(double? value) {
+    if (value == null) return '-';
+    return NumberFormat.compact().format(value);
+  }
+
+  /// Formats ISO date time string to readable short date.
+  static String formatDate(String? isoDate) {
+    if (isoDate == null || isoDate.isEmpty) return '-';
+    try {
+      final dt = DateTime.parse(isoDate).toLocal();
+      return DateFormat('dd.MM.yyyy HH:mm').format(dt);
+    } catch (_) {
+      return isoDate;
+    }
+  }
+
+  /// Formats date to day-month format.
+  static String formatShortDate(DateTime dt) {
+    return DateFormat('dd. MMM yyyy').format(dt);
+  }
+}