Implement LLM provider configuration and update user settings

- Added functionality to update the default LLM provider for users via a new endpoint in UserController.
- Introduced LlmProvider enum to manage available LLM options: Auto, Gemini, OpenAI, and Claude.
- Updated User and UserEntity models to include DefaultLlmProvider property.
- Enhanced database context and migrations to support the new LLM provider configuration.
- Integrated LLM services into the application bootstrap for dependency injection.
- Updated TypeScript API client to include methods for managing LLM providers and chat requests.

src/Managing.Infrastructure.Database/PostgreSql/Entities/UserEntity.cs

@@ -34,6 +34,9 @@ public class UserEntity
     [Column(TypeName = "decimal(5,4)")] public decimal? SignalAgreementThreshold { get; set; } = 0.5m; // Default: 50% agreement required
     public bool? AllowSignalTrendOverride { get; set; } = true; // Default: Allow signal strategies to override trends
     public TradingExchanges? DefaultExchange { get; set; } = TradingExchanges.GmxV2; // Default exchange
+    
+    // User Settings - LLM Configuration
+    public LlmProvider? DefaultLlmProvider { get; set; } = LlmProvider.Auto; // Default LLM provider
 
     // Navigation properties
     public virtual ICollection<AccountEntity> Accounts { get; set; } = new List<AccountEntity>();

src/Managing.Infrastructure.Database/PostgreSql/ManagingDbContext.cs

@@ -105,6 +105,9 @@ public class ManagingDbContext : DbContext
                 .HasConversion<string>(); // Store enum as string
             entity.Property(e => e.DefaultExchange)
                 .HasConversion<string>(); // Store enum as string
+            entity.Property(e => e.DefaultLlmProvider)
+                .HasConversion<string>() // Store enum as string
+                .HasDefaultValueSql("'Auto'"); // Default LLM provider
             
             // Create indexes for performance
             entity.HasIndex(e => e.Name).IsUnique();

src/Managing.Infrastructure.Database/PostgreSql/PostgreSqlMappers.cs

@@ -146,6 +146,7 @@ public static class PostgreSqlMappers
             SignalAgreementThreshold = entity.SignalAgreementThreshold,
             AllowSignalTrendOverride = entity.AllowSignalTrendOverride,
             DefaultExchange = entity.DefaultExchange,
+            DefaultLlmProvider = entity.DefaultLlmProvider,
             Accounts = entity.Accounts?.Select(MapAccountWithoutUser).ToList() ?? new List<Account>()
         };
     }
@@ -193,7 +194,8 @@ public static class PostgreSqlMappers
             TrendStrongAgreementThreshold = user.TrendStrongAgreementThreshold,
             SignalAgreementThreshold = user.SignalAgreementThreshold,
             AllowSignalTrendOverride = user.AllowSignalTrendOverride,
-            DefaultExchange = user.DefaultExchange
+            DefaultExchange = user.DefaultExchange,
+            DefaultLlmProvider = user.DefaultLlmProvider
         };
     }
 

src/Managing.Infrastructure.Database/PostgreSql/PostgreSqlUserRepository.cs

@@ -269,6 +269,7 @@ public class PostgreSqlUserRepository : BaseRepositoryWithLogging, IUserReposito
                     existingUser.SignalAgreementThreshold = user.SignalAgreementThreshold;
                     existingUser.AllowSignalTrendOverride = user.AllowSignalTrendOverride;
                     existingUser.DefaultExchange = user.DefaultExchange;
+                    existingUser.DefaultLlmProvider = user.DefaultLlmProvider;
 
                     _context.Users.Update(existingUser);