Add Session Diary and Extra Usage Credits sections to Windows app

windows/Models.cs

@@ -21,8 +21,9 @@ public class AgentLimit
 
 public class UsageResponse
 {
-    [JsonPropertyName("five_hour")] public WindowData? FiveHour { get; set; }
+    [JsonPropertyName("five_hour")]   public WindowData?  FiveHour   { get; set; }
-    [JsonPropertyName("seven_day")] public WindowData? SevenDay  { get; set; }
+    [JsonPropertyName("seven_day")]   public WindowData?  SevenDay   { get; set; }
+    [JsonPropertyName("extra_usage")] public ExtraUsage?  ExtraUsage { get; set; }
 }
 
 public class WindowData
@@ -31,6 +32,12 @@ public class WindowData
     [JsonPropertyName("resets_at")]   public string? ResetsAt   { get; set; }
 }
 
+public class ExtraUsage
+{
+    [JsonPropertyName("is_enabled")] public bool    IsEnabled { get; set; }
+    [JsonPropertyName("currency")]   public string? Currency  { get; set; }
+}
+
 public class BootstrapResponse
 {
     [JsonPropertyName("account")] public AccountInfo? Account { get; set; }

windows/PopupWindow.xaml.cs

@@ -55,6 +55,13 @@ public partial class PopupWindow : Window
         CardsPanel.Children.Clear();
         foreach (var limit in VM.Limits)
             CardsPanel.Children.Add(BuildCard(limit));
+
+        var fiveHour = VM.Limits.FirstOrDefault(l => l.Window == WindowKind.FiveHour);
+        if (fiveHour != null && fiveHour.BurnHistory.Count > 0)
+            CardsPanel.Children.Add(BuildDiarySection(fiveHour));
+
+        if (VM.ExtraUsage?.IsEnabled == true)
+            CardsPanel.Children.Add(BuildExtraUsageSection());
     }
 
     private static UIElement BuildCard(AgentLimit limit)
@@ -180,12 +187,132 @@ public partial class PopupWindow : Window
         return section;
     }
 
+    private static UIElement BuildDiarySection(AgentLimit limit)
+    {
+        var text      = (SolidColorBrush)Application.Current.Resources["TextBrush"];
+        var secondary = (SolidColorBrush)Application.Current.Resources["SecondaryBrush"];
+        var border    = (SolidColorBrush)Application.Current.Resources["BorderBrush"];
+
+        var samples = limit.BurnHistory.Count;
+        var avgBurn = limit.BurnRate;
+
+        var subtitle = new TextBlock
+        {
+            Text       = $"{samples} samples · {avgBurn:F1}%/h avg burn rate",
+            FontSize   = 11,
+            Foreground = secondary,
+            Margin     = new Thickness(16, 0, 16, 6),
+        };
+
+        var sparkline = new SparklineControl
+        {
+            Height    = 32,
+            Margin    = new Thickness(8, 8, 8, 8),
+            LineColor = Color.FromRgb(0xF9, 0x73, 0x16),
+            Data      = limit.BurnHistory,
+        };
+
+        var card = new Border
+        {
+            Background      = (SolidColorBrush)Application.Current.Resources["CardBrush"],
+            CornerRadius    = new CornerRadius(6),
+            BorderBrush     = border,
+            BorderThickness = new Thickness(1),
+            Margin          = new Thickness(12, 0, 12, 0),
+            Child           = sparkline,
+        };
+
+        var sectionLabel = new TextBlock
+        {
+            Text   = "SESSION DIARY",
+            Style  = (Style)Application.Current.Resources["HeaderText"],
+            Margin = new Thickness(16, 12, 16, 6),
+        };
+
+        var section = new StackPanel();
+        section.Children.Add(sectionLabel);
+        section.Children.Add(subtitle);
+        section.Children.Add(card);
+        return section;
+    }
+
+    private UIElement BuildExtraUsageSection()
+    {
+        var text      = (SolidColorBrush)Application.Current.Resources["TextBrush"];
+        var secondary = (SolidColorBrush)Application.Current.Resources["SecondaryBrush"];
+        var border    = (SolidColorBrush)Application.Current.Resources["BorderBrush"];
+        var accent    = new SolidColorBrush(Color.FromRgb(0xF9, 0x73, 0x16));
+
+        var overage  = VM.Overage;
+        var prepaid  = VM.Prepaid;
+        var currency = VM.ExtraUsage?.Currency ?? overage?.Currency ?? "$";
+
+        var spent   = overage?.UsedCredits         ?? 0;
+        var limit   = overage?.MonthlyCreditLimit  ?? 0;
+        var balance = prepaid?.Amount              ?? 0;
+
+        UIElement MakeRow(string label, string value)
+        {
+            var row = new Grid { Margin = new Thickness(0, 3, 0, 3) };
+            row.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
+            row.ColumnDefinitions.Add(new ColumnDefinition { Width = GridLength.Auto });
+            var lbl = new TextBlock { Text = label, FontSize = 12, Foreground = secondary };
+            var val = new TextBlock { Text = value, FontSize = 12, FontWeight = FontWeights.Medium, Foreground = text };
+            Grid.SetColumn(lbl, 0);
+            Grid.SetColumn(val, 1);
+            row.Children.Add(lbl);
+            row.Children.Add(val);
+            return row;
+        }
+
+        var contentPanel = new StackPanel { Margin = new Thickness(12, 10, 12, 10) };
+        contentPanel.Children.Add(MakeRow("Spent",   $"{currency}{spent:F2}"));
+        if (limit   > 0) contentPanel.Children.Add(MakeRow("Limit",   $"{currency}{limit:F2}"));
+        if (balance > 0) contentPanel.Children.Add(MakeRow("Balance", $"{currency}{balance:F2}"));
+
+        if (limit > 0)
+        {
+            var pct = Math.Min(spent / limit * 100, 100);
+            contentPanel.Children.Add(new ProgressBar
+            {
+                Value           = pct, Maximum = 100, Height = 4,
+                Margin          = new Thickness(0, 6, 0, 0),
+                Foreground      = accent,
+                Background      = new SolidColorBrush(Color.FromArgb(20, 0, 0, 0)),
+                BorderThickness = new Thickness(0),
+            });
+        }
+
+        var card = new Border
+        {
+            Background      = (SolidColorBrush)Application.Current.Resources["CardBrush"],
+            CornerRadius    = new CornerRadius(6),
+            BorderBrush     = border,
+            BorderThickness = new Thickness(1),
+            Margin          = new Thickness(12, 0, 12, 0),
+            Child           = contentPanel,
+        };
+
+        var sectionLabel = new TextBlock
+        {
+            Text   = "EXTRA USAGE CREDITS",
+            Style  = (Style)Application.Current.Resources["HeaderText"],
+            Margin = new Thickness(16, 12, 16, 6),
+        };
+
+        var section = new StackPanel();
+        section.Children.Add(sectionLabel);
+        section.Children.Add(card);
+        return section;
+    }
+
     // ── State updates ────────────────────────────────────────────────
 
     private void OnVmChanged(string? prop)
     {
         if (prop is nameof(UsageViewModel.Limits) or nameof(UsageViewModel.IsLoading)
-                 or nameof(UsageViewModel.LastUpdated) or nameof(UsageViewModel.ErrorMessage))
+                 or nameof(UsageViewModel.LastUpdated) or nameof(UsageViewModel.ErrorMessage)
+                 or nameof(UsageViewModel.ExtraUsage) or nameof(UsageViewModel.Overage) or nameof(UsageViewModel.Prepaid))
         {
             RebuildCards();
             UpdateFooter();

windows/RELEASE_NOTES.md

@@ -1,4 +1,3 @@
-## What's new in beta.33
+## What's new in beta.34
-
+- Add: Session Diary section showing 5h burn rate history sparkline
-- Fix: gauge percentage text is now vertically centered within the dial
+- Add: Extra Usage Credits section showing spent/limit/balance (when enabled)
-- Remove: debug banner no longer appears on the main panel

windows/UsageViewModel.cs

@@ -24,6 +24,7 @@ public class UsageViewModel : INotifyPropertyChanged
     private DateTime? _lastUpdated;
     private OverageSpendLimit? _overage;
     private PrepaidCredits? _prepaid;
+    private ExtraUsage? _extraUsage;
 
     private readonly Dictionary<string, List<double>> _burnHistory = [];
     private const int MaxHistorySamples = 24;
@@ -37,6 +38,7 @@ public class UsageViewModel : INotifyPropertyChanged
     public DateTime? LastUpdated            { get => _lastUpdated;  set => Set(ref _lastUpdated, value); }
     public OverageSpendLimit? Overage       { get => _overage;      set => Set(ref _overage, value); }
     public PrepaidCredits? Prepaid          { get => _prepaid;      set => Set(ref _prepaid, value); }
+    public ExtraUsage? ExtraUsage           { get => _extraUsage;   set => Set(ref _extraUsage, value); }
 
     private int _refreshInterval = 120;
     public int RefreshInterval
@@ -98,9 +100,9 @@ public class UsageViewModel : INotifyPropertyChanged
             // HttpClient refresh — WebView2 is NOT used here to avoid spawning a heavy
             // browser process every refresh cycle (causes memory accumulation).
             // SaveAndClose at login time is responsible for fetching live data via WebView2.
-            var (limits, overage, prepaid, email, orgId, ok) = hasCookies
+            var (limits, overage, prepaid, extraUsage, email, orgId, ok) = hasCookies
                 ? await TryHttpRefreshAsync(cookies)
-                : ([], null, null, null, null, false);
+                : ([], null, null, null, null, null, false);
 
             // Fill in any blanks from cached values saved at login time
             if (string.IsNullOrEmpty(email))  email  = AppSettings.Default.Email;
@@ -129,7 +131,7 @@ public class UsageViewModel : INotifyPropertyChanged
 
             await Application.Current.Dispatcher.InvokeAsync(() =>
             {
-                if (limits.Count > 0) { Limits = limits; Overage = overage; Prepaid = prepaid; }
+                if (limits.Count > 0) { Limits = limits; Overage = overage; Prepaid = prepaid; ExtraUsage = extraUsage; }
                 if (!string.IsNullOrEmpty(email)) UserEmail = email;
                 IsSignedIn   = true;
                 ErrorMessage = null;
@@ -147,7 +149,7 @@ public class UsageViewModel : INotifyPropertyChanged
         }
     }
 
-    private async Task<(List<AgentLimit>, OverageSpendLimit?, PrepaidCredits?, string?, string?, bool)>
+    private async Task<(List<AgentLimit>, OverageSpendLimit?, PrepaidCredits?, ExtraUsage?, string?, string?, bool)>
         TryHttpRefreshAsync(List<(string Name, string Value, string Domain, string Path)> cookies)
     {
         try
@@ -165,7 +167,7 @@ public class UsageViewModel : INotifyPropertyChanged
                 orgId = AppSettings.Default.OrgId;
 
             if (string.IsNullOrEmpty(orgId))
-                return ([], null, null, email, orgId, true);
+                return ([], null, null, null, email, orgId, true);
 
             AppSettings.Default.OrgId = orgId;
             AppSettings.Default.Save();
@@ -175,9 +177,9 @@ public class UsageViewModel : INotifyPropertyChanged
             var pt = FetchAsync<PrepaidCredits>(http, $"https://claude.ai/api/organizations/{orgId}/prepaid/credits");
             await Task.WhenAll(ut, ot, pt);
 
-            return (BuildLimits(ut.Result), ot.Result, pt.Result, email, orgId, true);
+            return (BuildLimits(ut.Result), ot.Result, pt.Result, ut.Result?.ExtraUsage, email, orgId, true);
         }
-        catch { return ([], null, null, null, null, false); }
+        catch { return ([], null, null, null, null, null, false); }
     }
 
     private static async Task<(List<AgentLimit>, string?, string?)> TryWebView2RefreshAsync()