feat: Bot management improvements with wallet configuration and duplicate detection

LittleShop/Services/BotService.cs

@@ -99,6 +99,27 @@ public class BotService : IBotService
         return bot != null ? MapToDto(bot) : null;
     }
 
+    public async Task<BotDto?> GetBotByPlatformUsernameAsync(int platformType, string platformUsername)
+    {
+        try
+        {
+            var bot = await _context.Bots
+                .Include(b => b.Sessions)
+                .Include(b => b.Metrics)
+                .FirstOrDefaultAsync(b =>
+                    b.Type == (BotType)platformType &&
+                    b.PlatformUsername == platformUsername &&
+                    b.Status != BotStatus.Deleted);
+
+            return bot != null ? MapToDto(bot) : null;
+        }
+        catch (Microsoft.Data.Sqlite.SqliteException ex) when (ex.Message.Contains("no such table"))
+        {
+            // Tables don't exist yet - return null
+            return null;
+        }
+    }
+
     public async Task<IEnumerable<BotDto>> GetAllBotsAsync()
     {
         try

LittleShop/Services/IBotService.cs

@@ -12,6 +12,7 @@ public interface IBotService
     Task<BotDto?> AuthenticateBotAsync(string botKey);
     Task<BotDto?> GetBotByIdAsync(Guid id);
     Task<BotDto?> GetBotByKeyAsync(string botKey);
+    Task<BotDto?> GetBotByPlatformUsernameAsync(int platformType, string platformUsername);
     Task<IEnumerable<BotDto>> GetAllBotsAsync();
     Task<IEnumerable<BotDto>> GetActiveBots();
     Task<bool> UpdateBotSettingsAsync(Guid botId, UpdateBotSettingsDto dto);