Add Daily Rewards & Time Trials features

NEW FEATURES:
- Daily login rewards with Gold and Cash
- Daily time trial racing events
- FREE gold purchase system
- Streak tracking for consecutive days
- Web panel for managing rewards and events

ENDPOINTS ADDED:
- GET/POST /synergy/rewards/daily/{id} - Daily rewards
- POST /synergy/rewards/gold/purchase - Buy gold (FREE)
- GET /synergy/rewards/timetrials - Active events
- POST /synergy/rewards/timetrials/{id}/submit - Submit times

DATABASE:
- DailyReward table - tracks claims and streaks
- TimeTrial table - racing events with rewards
- TimeTrialResult table - player submissions
- User.Gold and User.Cash - currency tracking

WEB PANEL:
- /admin/rewards - Manage all reward features
- Create/edit/activate time trial events
- View reward statistics and history
- Gold packages in catalog (100, 500, 1000, 5000)

FOCUS:
- Single-player progression features
- NO race teams or multiplayer
- Perfect for offline play
- All purchases are FREE in community server

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

RR3CommunityServer/Data/RR3DbContext.cs

@@ -11,6 +11,9 @@ public class RR3DbContext : DbContext
     public DbSet<Session> Sessions { get; set; }
     public DbSet<Purchase> Purchases { get; set; }
     public DbSet<CatalogItem> CatalogItems { get; set; }
+    public DbSet<DailyReward> DailyRewards { get; set; }
+    public DbSet<TimeTrial> TimeTrials { get; set; }
+    public DbSet<TimeTrialResult> TimeTrialResults { get; set; }
 
     protected override void OnModelCreating(ModelBuilder modelBuilder)
     {
@@ -46,6 +49,76 @@ public class RR3DbContext : DbContext
                 Available = true
             }
         );
+
+        // Seed gold purchase options
+        modelBuilder.Entity<CatalogItem>().HasData(
+            new CatalogItem
+            {
+                Id = 4,
+                Sku = "com.ea.rr3.gold_100",
+                Name = "100 Gold",
+                Type = "currency",
+                Price = 0m, // FREE in community server
+                Available = true
+            },
+            new CatalogItem
+            {
+                Id = 5,
+                Sku = "com.ea.rr3.gold_500",
+                Name = "500 Gold",
+                Type = "currency",
+                Price = 0m,
+                Available = true
+            },
+            new CatalogItem
+            {
+                Id = 6,
+                Sku = "com.ea.rr3.gold_1000",
+                Name = "1000 Gold",
+                Type = "currency",
+                Price = 0m,
+                Available = true
+            },
+            new CatalogItem
+            {
+                Id = 7,
+                Sku = "com.ea.rr3.gold_5000",
+                Name = "5000 Gold",
+                Type = "currency",
+                Price = 0m,
+                Available = true
+            }
+        );
+
+        // Seed time trials
+        modelBuilder.Entity<TimeTrial>().HasData(
+            new TimeTrial
+            {
+                Id = 1,
+                Name = "Daily Sprint Challenge",
+                TrackName = "Silverstone National",
+                CarName = "Any Car",
+                StartDate = DateTime.UtcNow,
+                EndDate = DateTime.UtcNow.AddDays(7),
+                TargetTime = 90.5,
+                GoldReward = 50,
+                CashReward = 10000,
+                Active = true
+            },
+            new TimeTrial
+            {
+                Id = 2,
+                Name = "Speed Demon Trial",
+                TrackName = "Dubai Autodrome",
+                CarName = "Any Car",
+                StartDate = DateTime.UtcNow,
+                EndDate = DateTime.UtcNow.AddDays(7),
+                TargetTime = 120.0,
+                GoldReward = 100,
+                CashReward = 25000,
+                Active = true
+            }
+        );
     }
 }
 
@@ -66,6 +139,8 @@ public class User
     public string? DeviceId { get; set; }
     public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
     public string? Nickname { get; set; }
+    public int? Gold { get; set; } = 0;
+    public int? Cash { get; set; } = 0;
 }
 
 public class Session
@@ -104,3 +179,41 @@ public class CatalogItem
     public decimal Price { get; set; }
     public bool Available { get; set; } = true;
 }
+
+public class DailyReward
+{
+    public int Id { get; set; }
+    public int UserId { get; set; }
+    public DateTime RewardDate { get; set; }
+    public int GoldAmount { get; set; }
+    public int CashAmount { get; set; }
+    public bool Claimed { get; set; }
+    public DateTime? ClaimedAt { get; set; }
+    public int Streak { get; set; }
+}
+
+public class TimeTrial
+{
+    public int Id { get; set; }
+    public string Name { get; set; } = string.Empty;
+    public string TrackName { get; set; } = string.Empty;
+    public string CarName { get; set; } = string.Empty;
+    public DateTime StartDate { get; set; }
+    public DateTime EndDate { get; set; }
+    public double TargetTime { get; set; }
+    public int GoldReward { get; set; }
+    public int CashReward { get; set; }
+    public bool Active { get; set; } = true;
+}
+
+public class TimeTrialResult
+{
+    public int Id { get; set; }
+    public int UserId { get; set; }
+    public int TimeTrialId { get; set; }
+    public double TimeSeconds { get; set; }
+    public DateTime SubmittedAt { get; set; }
+    public bool BeatTarget { get; set; }
+    public int GoldEarned { get; set; }
+    public int CashEarned { get; set; }
+}