Add user progress dashboard

api/QuestionsApi/Models/DashboardModels.cs

@@ -0,0 +1,54 @@
+namespace QuestionsApi.Models;
+
+public sealed class DashboardResponse
+{
+    public int QuestionBankRating { get; set; } = 1000;
+    public int RatedQuestionCount { get; set; }
+    public int CcsRating { get; set; } = 1000;
+    public int RatedCcsCaseCount { get; set; }
+    public int FirstAttemptAccuracy { get; set; }
+    public int AccuracySampleSize { get; set; }
+    public int QuestionsThisWeek { get; set; }
+    public int StudyTimeSecondsThisWeek { get; set; }
+    public int CurrentStreak { get; set; }
+    public int MissedQuestionCount { get; set; }
+    public int BookmarkCount { get; set; }
+    public int NoteCount { get; set; }
+    public List<DashboardTrendPoint> PerformanceTrend { get; set; } = [];
+    public List<DashboardSystemPerformance> Systems { get; set; } = [];
+    public List<DashboardActivityDay> WeeklyActivity { get; set; } = [];
+    public List<DashboardRecentActivity> RecentActivity { get; set; } = [];
+}
+
+public sealed class DashboardTrendPoint
+{
+    public DateTime DateUtc { get; set; }
+    public int Correct { get; set; }
+    public int Total { get; set; }
+    public int Accuracy { get; set; }
+}
+
+public sealed class DashboardSystemPerformance
+{
+    public string System { get; set; } = "General";
+    public int Correct { get; set; }
+    public int Total { get; set; }
+    public int Accuracy { get; set; }
+}
+
+public sealed class DashboardActivityDay
+{
+    public DateTime DateUtc { get; set; }
+    public int Questions { get; set; }
+    public int CcsCases { get; set; }
+    public int StudyTimeSeconds { get; set; }
+}
+
+public sealed class DashboardRecentActivity
+{
+    public string Type { get; set; } = "question";
+    public string Title { get; set; } = "";
+    public string Detail { get; set; } = "";
+    public DateTime OccurredUtc { get; set; }
+    public string Route { get; set; } = "";
+}