Fase 3: Soporte de Imágenes en Wizard y Backend (Upload Local)

src/SIGCM.Infrastructure/Data/DbInitializer.cs

@@ -154,6 +154,18 @@ BEGIN
         FOREIGN KEY (AttributeDefinitionId) REFERENCES AttributeDefinitions(Id) ON DELETE NO ACTION
     );
 END
+
+IF NOT EXISTS (SELECT * FROM sys.tables WHERE name = 'ListingImages')
+BEGIN
+    CREATE TABLE ListingImages (
+        Id INT IDENTITY(1,1) PRIMARY KEY,
+        ListingId INT NOT NULL,
+        Url NVARCHAR(500) NOT NULL,
+        IsMainInfo BIT DEFAULT 0,
+        DisplayOrder INT DEFAULT 0,
+        FOREIGN KEY (ListingId) REFERENCES Listings(Id) ON DELETE CASCADE
+    );
+END
 ";
         await connection.ExecuteAsync(schemaSql);
     }

src/SIGCM.Infrastructure/DependencyInjection.cs

@@ -19,6 +19,7 @@ public static class DependencyInjection
         services.AddScoped<IAuthService, Services.AuthService>();
         services.AddScoped<IAttributeDefinitionRepository, AttributeDefinitionRepository>();
         services.AddScoped<IListingRepository, ListingRepository>();
+        services.AddScoped<IImageRepository, ImageRepository>();
         return services;
     }
 }

src/SIGCM.Infrastructure/Repositories/ImageRepository.cs

@@ -0,0 +1,33 @@
+using Dapper;
+using SIGCM.Domain.Entities;
+using SIGCM.Domain.Interfaces;
+using SIGCM.Infrastructure.Data;
+
+namespace SIGCM.Infrastructure.Repositories;
+
+public class ImageRepository : IImageRepository
+{
+    private readonly IDbConnectionFactory _connectionFactory;
+
+    public ImageRepository(IDbConnectionFactory connectionFactory)
+    {
+        _connectionFactory = connectionFactory;
+    }
+
+    public async Task AddAsync(ListingImage image)
+    {
+        using var conn = _connectionFactory.CreateConnection();
+        var sql = @"
+            INSERT INTO ListingImages (ListingId, Url, IsMainInfo, DisplayOrder)
+            VALUES (@ListingId, @Url, @IsMainInfo, @DisplayOrder)";
+        await conn.ExecuteAsync(sql, image);
+    }
+
+    public async Task<IEnumerable<ListingImage>> GetByListingIdAsync(int listingId)
+    {
+        using var conn = _connectionFactory.CreateConnection();
+        return await conn.QueryAsync<ListingImage>(
+            "SELECT * FROM ListingImages WHERE ListingId = @ListingId ORDER BY DisplayOrder", 
+            new { ListingId = listingId });
+    }
+}