feat(data): per-list base branch, preserved by every config writer

src/ClaudeDo.Data/Configuration/ListConfigEntityConfiguration.cs

@@ -21,5 +21,6 @@ public class ListConfigEntityConfiguration : IEntityTypeConfiguration<ListConfig
         builder.Property(c => c.PermissionMode).HasColumnName("permission_mode");
         builder.Property(c => c.TicketProjectId).HasColumnName("ticket_project_id");
         builder.Property(c => c.PowerUseAllowed).HasColumnName("power_use_allowed");
+        builder.Property(c => c.BaseBranch).HasColumnName("base_branch");
     }
 }

src/ClaudeDo.Data/Migrations/20261001083902_AddListBaseBranch.cs

@@ -0,0 +1,28 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace ClaudeDo.Data.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddListBaseBranch : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "base_branch",
+                table: "list_config",
+                type: "TEXT",
+                nullable: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "base_branch",
+                table: "list_config");
+        }
+    }
+}

src/ClaudeDo.Data/Migrations/ClaudeDoDbContextModelSnapshot.cs

@@ -268,6 +268,10 @@ namespace ClaudeDo.Data.Migrations
                         .HasColumnType("TEXT")
                         .HasColumnName("agent_path");
 
+                    b.Property<string>("BaseBranch")
+                        .HasColumnType("TEXT")
+                        .HasColumnName("base_branch");
+
                     b.Property<int?>("MaxTurns")
                         .HasColumnType("INTEGER")
                         .HasColumnName("max_turns");

src/ClaudeDo.Data/Models/ListConfigEntity.cs

@@ -23,6 +23,12 @@ public sealed class ListConfigEntity
     // false, also opt-in. ⚠️ Gleiche Falle wie TicketProjectId: SetConfigAsync kopiert verbatim.
     public bool PowerUseAllowed { get; set; }
 
+    /// <summary>
+    /// Basis neuer Worktrees und Default-Merge-/PR-Ziel (z.B. <c>dev</c>). Null = ausgecheckter Branch
+    /// (privat) bzw. Default-Branch des Remotes (Firma). ⚠️ SetConfigAsync kopiert verbatim.
+    /// </summary>
+    public string? BaseBranch { get; set; }
+
     // Navigation property
     public ListEntity List { get; set; } = null!;
 }

src/ClaudeDo.Data/Repositories/ListRepository.cs

@@ -175,6 +175,7 @@ public sealed class ListRepository
             existing.PermissionMode = config.PermissionMode;
             existing.TicketProjectId = config.TicketProjectId;
             existing.PowerUseAllowed = config.PowerUseAllowed;
+            existing.BaseBranch = config.BaseBranch;
         }
         await _context.SaveChangesAsync(ct);
     }

src/ClaudeDo.Data/Wire.cs

@@ -108,11 +108,12 @@ public record UpdateListDto(string Id, string Name, string? WorkingDir, string D
 // verbatim. Its scale: null = keep stored, <= 0 = clear the link, > 0 = set it.
 // PowerUseAllowed is nullable for the same reason: null = keep stored, false = revoke the opt-in.
 // A non-nullable bool here would let any caller that omits it silently revoke PowerUse for the list.
-public record UpdateListConfigDto(string ListId, string? Model, string? SystemPrompt, string? AgentPath, int? MaxTurns = null, List<string>? SessionSkills = null, string? VerifyCommand = null, string? PermissionMode = null, int? TicketProjectId = null, bool? PowerUseAllowed = null);
+// BaseBranch: null = keep stored, "" = clear, value = set.
+public record UpdateListConfigDto(string ListId, string? Model, string? SystemPrompt, string? AgentPath, int? MaxTurns = null, List<string>? SessionSkills = null, string? VerifyCommand = null, string? PermissionMode = null, int? TicketProjectId = null, bool? PowerUseAllowed = null, string? BaseBranch = null);
 
 public record UpdateTaskAgentSettingsDto(string TaskId, string? Model, string? SystemPrompt, string? AgentPath, int? MaxTurns = null, List<string>? SessionSkills = null, string? PermissionMode = null);
 
-public record ListConfigDto(string? Model, string? SystemPrompt, string? AgentPath, int? MaxTurns = null, List<string>? SessionSkills = null, string? VerifyCommand = null, string? PermissionMode = null, int? TicketProjectId = null, bool PowerUseAllowed = false);
+public record ListConfigDto(string? Model, string? SystemPrompt, string? AgentPath, int? MaxTurns = null, List<string>? SessionSkills = null, string? VerifyCommand = null, string? PermissionMode = null, int? TicketProjectId = null, bool PowerUseAllowed = false, string? BaseBranch = null);
 
 public record SeedResultDto(int Copied, int Skipped);