Layout changes, fix bugs in new entry page

lib/objects/objects.dart

@@ -1,11 +1,11 @@
 import 'package:flutter/material.dart';
 import 'package:intl/intl.dart';
 
-int _asInt(dynamic value, [int fallback = 0]) {
+int _asInt(dynamic value, [int? fallback]) {
   if (value is int) return value;
   if (value is num) return value.toInt();
   final parsed = int.tryParse(value?.toString() ?? '');
-  return parsed ?? fallback;
+  return parsed ?? fallback ?? 0;
 }
 
 double _asDouble(dynamic value, [double fallback = 0]) {
@@ -20,6 +20,15 @@ String _asString(dynamic value, [String fallback = '']) {
   return (str == null) ? fallback : str;
 }
 
+bool _asBool(dynamic value, [bool fallback = false]) {
+  if (value is bool) return value;
+  if (value is num) return value != 0;
+  final lower = value?.toString().toLowerCase();
+  if (lower == 'true' || lower == 'yes' || lower == '1') return true;
+  if (lower == 'false' || lower == 'no' || lower == '0') return false;
+  return fallback;
+}
+
 DateTime _asDateTime(dynamic value, [DateTime? fallback]) {
   if (value is DateTime) return value;
   final parsed = DateTime.tryParse(value?.toString() ?? '');
@@ -67,6 +76,7 @@ class HomepageStats {
   final List<LocoSummary> topLocos;
   final List<LeaderboardEntry> leaderboard;
   final List<TripSummary> trips;
+  final int legCount;
   final UserData? user;
 
   HomepageStats({
@@ -75,6 +85,7 @@ class HomepageStats {
     required this.topLocos,
     required this.leaderboard,
     required this.trips,
+    required this.legCount,
     this.user,
   });
 
@@ -98,6 +109,10 @@ class HomepageStats {
       trips: (json['trip_data'] as List? ?? [])
           .map((e) => TripSummary.fromJson(e))
           .toList(),
+      legCount: _asInt(
+        json['leg_count'],
+        (json['trip_legs'] as List?)?.length ?? 0,
+      ),
       user: userData == null
           ? null
           : UserData(
@@ -126,6 +141,7 @@ class Loco {
   final int id;
   final String type, number, locoClass;
   final String? name, operator, notes, evn;
+  final bool powering;
 
   Loco({
     required this.id,
@@ -136,6 +152,7 @@ class Loco {
     required this.operator,
     this.notes,
     this.evn,
+    this.powering = true,
   });
 
   factory Loco.fromJson(Map<String, dynamic> json) => Loco(
@@ -147,6 +164,7 @@ class Loco {
     operator: json['operator'],
     notes: json['notes'],
     evn: json['evn'],
+    powering: _asBool(json['alloc_powering'] ?? json['powering'], true),
   );
 }
 
@@ -179,6 +197,7 @@ class LocoSummary extends Loco {
     this.livery,
     this.location,
     Map<String, dynamic>? extra,
+    bool powering = true,
   }) : extra = extra ?? const {},
        super(
          id: locoId,
@@ -188,6 +207,7 @@ class LocoSummary extends Loco {
          operator: locoOperator,
          notes: locoNotes,
          evn: locoEvn,
+         powering: powering,
        );
 
   factory LocoSummary.fromJson(Map<String, dynamic> json) => LocoSummary(
@@ -213,6 +233,7 @@ class LocoSummary extends Loco {
     livery: json['livery'],
     location: json['location'],
     extra: Map<String, dynamic>.from(json),
+    powering: _asBool(json['alloc_powering'] ?? json['powering'], true),
   );
 }
 
@@ -353,6 +374,96 @@ class LocoAttrVersion {
   }
 }
 
+class LocoChange {
+  final int locoId;
+  final String locoClass;
+  final String locoNumber;
+  final String locoName;
+  final String attrCode;
+  final String attrDisplay;
+  final String valueDisplay;
+  final DateTime? validFrom;
+  final DateTime? approvedAt;
+  final String approvedBy;
+
+  const LocoChange({
+    required this.locoId,
+    required this.locoClass,
+    required this.locoNumber,
+    required this.locoName,
+    required this.attrCode,
+    required this.attrDisplay,
+    required this.valueDisplay,
+    required this.validFrom,
+    required this.approvedAt,
+    required this.approvedBy,
+  });
+
+  factory LocoChange.fromJson(Map<String, dynamic> json) {
+    String _clean(dynamic value) {
+      final str = value?.toString().trim() ?? '';
+      if (str.isEmpty || str == '-' || str == '?') return '';
+      return str;
+    }
+
+    final valueLabel = json['value_norm'] ??
+        json['value_display'] ??
+        json['value_label'] ??
+        json['value_str'] ??
+        json['value_enum'] ??
+        json['value_norm'] ??
+        json['value'];
+    final approvedRaw = json['approved_at'] ?? json['approvedAt'];
+    final validFromRaw = json['valid_from'] ?? json['validFrom'];
+    return LocoChange(
+      locoId: _asInt(json['loco_id']),
+      locoClass: _clean(json['loco_class']),
+      locoNumber: _clean(json['loco_number']),
+      locoName: _clean(json['loco_name']),
+      attrCode: _asString(json['attr_code']),
+      attrDisplay: _clean(json['attr_display']),
+      valueDisplay: _clean(valueLabel),
+      validFrom: DateTime.tryParse(validFromRaw?.toString() ?? ''),
+      approvedAt: DateTime.tryParse(approvedRaw?.toString() ?? ''),
+      approvedBy: _clean(json['approved_by']),
+    );
+  }
+
+  String get locoLabel {
+    final parts = [locoClass, locoNumber]
+        .map((e) => e.trim())
+        .where((e) => e.isNotEmpty && e != '-')
+        .toList();
+    final label = parts.join(' ');
+    if (label.isEmpty) return locoName.isNotEmpty ? locoName : 'Loco $locoId';
+    return locoName.trim().isEmpty ? label : '$label — ${locoName.trim()}';
+  }
+
+  String get changeLabel =>
+      _cleanLabel(attrDisplay).isNotEmpty
+          ? _cleanLabel(attrDisplay)
+          : _cleanLabel(attrCode).toUpperCase();
+
+  String get approvedDateLabel {
+    final date = approvedAt ?? validFrom;
+    if (date == null) return 'Pending date';
+    return DateFormat('yyyy-MM-dd').format(date);
+  }
+
+  String get valueLabel {
+    final value = _cleanLabel(valueDisplay);
+    if (value.isNotEmpty) return value;
+    return 'Unknown value';
+  }
+
+  String _cleanLabel(String raw) {
+    final trimmed = raw.trim();
+    if (trimmed.isEmpty) return '';
+    if (trimmed == '-' || trimmed == '?') return '';
+    return trimmed;
+  }
+}
+
 class LeaderboardEntry {
   final String userId, username, userFullName;
   final double mileage;