chore(claude-do): merge Unit-Branch Teil 1: Branch-Naming + Basis-Branch pro Liste

ClaudeDo-Task: e202e601-64c0-4ecb-8dc9-2fb0da01a84a

src/ClaudeDo.Worker/Hub/WorkerHub.cs

@@ -601,9 +601,12 @@ public sealed class WorkerHub : Microsoft.AspNetCore.SignalR.Hub
         // Gleiches Tri-State-Muster: null = gespeicherten Wert behalten, false = Opt-in widerrufen.
         var powerUseAllowed = dto.PowerUseAllowed ?? existing?.PowerUseAllowed ?? false;
 
+        // Tri-State wie oben: null = behalten, "" = löschen.
+        var baseBranch = dto.BaseBranch is null ? existing?.BaseBranch : dto.BaseBranch.NullIfBlank();
+
         // powerUseAllowed muss mit in die Leer-Prüfung: sonst löscht ein Save, bei dem PowerUse das
         // EINZIGE gesetzte Feld ist, die Config-Zeile und damit das Opt-in gleich wieder mit.
-        if (model is null && systemPrompt is null && agentPath is null && dto.MaxTurns is null && sessionSkills is null && verifyCommand is null && permissionMode is null && ticketProjectId is null && !powerUseAllowed)
+        if (model is null && systemPrompt is null && agentPath is null && dto.MaxTurns is null && sessionSkills is null && verifyCommand is null && permissionMode is null && ticketProjectId is null && !powerUseAllowed && baseBranch is null)
         {
             await repo.DeleteConfigAsync(dto.ListId);
         }
@@ -621,6 +624,7 @@ public sealed class WorkerHub : Microsoft.AspNetCore.SignalR.Hub
                 PermissionMode = permissionMode,
                 TicketProjectId = ticketProjectId,
                 PowerUseAllowed = powerUseAllowed,
+                BaseBranch = baseBranch,
             });
         }
 
@@ -644,7 +648,7 @@ public sealed class WorkerHub : Microsoft.AspNetCore.SignalR.Hub
         var repo = new ListRepository(ctx);
         var config = await repo.GetConfigAsync(listId);
         if (config is null) return null;
-        return new ListConfigDto(config.Model, config.SystemPrompt, config.AgentPath, config.MaxTurns, SkillsFromJson(config.SessionSkills), config.VerifyCommand, config.PermissionMode, config.TicketProjectId, config.PowerUseAllowed);
+        return new ListConfigDto(config.Model, config.SystemPrompt, config.AgentPath, config.MaxTurns, SkillsFromJson(config.SessionSkills), config.VerifyCommand, config.PermissionMode, config.TicketProjectId, config.PowerUseAllowed, config.BaseBranch);
     }
 
     public async Task<SetTaskStatusResultDto> SetTaskStatus(string taskId, string status)