feat(ui): base branch field in list settings, real branch names in dialogs

src/ClaudeDo.Ui/ViewModels/Agent/AgentConfigEditorViewModel.cs

@@ -208,13 +208,13 @@ public sealed partial class AgentConfigEditorViewModel : ViewModelBase, IDisposa
         catch { }
     }
 
-    // verifyCommand, ticketProjectId and powerUseAllowed are List-only fields owned by
+    // verifyCommand, ticketProjectId, powerUseAllowed and baseBranch are List-only fields owned by
     // ListSettingsModalViewModel (not this editor, which is also reused for Task scope); the caller
     // passes them through so the single UpdateListConfig call carries the full desired row instead
     // of clobbering it. powerUseAllowed stays null-by-default for the same reason ticketProjectId
     // does: a caller that doesn't own it must not revoke the list's opt-in by omission.
     public async System.Threading.Tasks.Task SaveAsync(
-        string? verifyCommand = null, int? ticketProjectId = null, bool? powerUseAllowed = null)
+        string? verifyCommand = null, int? ticketProjectId = null, bool? powerUseAllowed = null, string? baseBranch = null)
     {
         if (TargetId is null) return;
         var model = string.IsNullOrWhiteSpace(Model) ? null : Model;
@@ -227,7 +227,7 @@ public sealed partial class AgentConfigEditorViewModel : ViewModelBase, IDisposa
         if (_scope == AgentConfigScope.Task)
             await _worker.UpdateTaskAgentSettingsAsync(new UpdateTaskAgentSettingsDto(TargetId, model, sp, ap, turns, skills, permission));
         else
-            await _worker.UpdateListConfigAsync(new UpdateListConfigDto(TargetId, model, sp, ap, turns, skills, verifyCommand, permission, ticketProjectId, powerUseAllowed));
+            await _worker.UpdateListConfigAsync(new UpdateListConfigDto(TargetId, model, sp, ap, turns, skills, verifyCommand, permission, ticketProjectId, powerUseAllowed, baseBranch));
     }
 
     private List<string>? SelectedSessionSkillNames()

src/ClaudeDo.Ui/ViewModels/Islands/DetailsIslandViewModel.cs

@@ -667,7 +667,7 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase, IDisposable
             WorktreeBaseCommit = entity.Worktree?.BaseCommit ?? entity.HandlerBaseCommit;
             WorktreeHeadCommit = entity.Worktree?.HeadCommit ?? entity.HandlerHeadCommit;
             WorktreeStateLabel = entity.Worktree?.State.ToString();
-            BranchLine = entity.Worktree is { } w ? $"{w.BranchName} ← main" : null;
+            BranchLine = entity.Worktree?.BranchName;
             var (add, del) = ParseDiffStat(entity.Worktree?.DiffStat);
             DiffAdditions = add;
             DiffDeletions = del;
@@ -930,7 +930,7 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase, IDisposable
             WorktreeBaseCommit = entity.Worktree?.BaseCommit ?? entity.HandlerBaseCommit;
             WorktreeHeadCommit = entity.Worktree?.HeadCommit ?? entity.HandlerHeadCommit;
             WorktreeStateLabel = entity.Worktree?.State.ToString();
-            BranchLine = entity.Worktree is { } w ? $"{w.BranchName} ← main" : null;
+            BranchLine = entity.Worktree?.BranchName;
             if (Task is { } row && entity.Worktree?.DiffStat is { } stat)
                 row.DiffStat = stat;
             var (add, del) = ParseDiffStat(entity.Worktree?.DiffStat);
@@ -1220,7 +1220,7 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase, IDisposable
         if (Task == null) return;
         if (Dialogs == null) return;
 
-        var branchName = $"claudedo/{Task.Id.Replace("-", "")}";
+        var branchName = BranchLine ?? "the task branch";
         var ok = await Dialogs.ConfirmAsync(
             $"Reset and retry?\nThis discards branch {branchName} (and uncommitted changes), then queues the task to run from the beginning.");
         if (!ok) return;
@@ -1382,7 +1382,7 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase, IDisposable
     private async System.Threading.Tasks.Task ResetReviewAsync()
     {
         if (Task is null || !_worker.IsConnected || Dialogs is null) return;
-        var branchName = $"claudedo/{Task.Id.Replace("-", "")}";
+        var branchName = BranchLine ?? "the task branch";
         var ok = await Dialogs.ConfirmAsync(
             $"Reset working tree?\nThis discards branch {branchName} (and all changes) and returns the task to Idle.");
         if (!ok) return;

src/ClaudeDo.Ui/ViewModels/Modals/ListSettingsModalViewModel.cs

@@ -59,6 +59,8 @@ public sealed partial class ListSettingsModalViewModel : ViewModelBase
     // harvests new work, longer handoff chain) when this AND the global switch in Settings →
     // Execution are both on. Off by default — the global switch alone must never change a list's behaviour.
     [ObservableProperty] private bool _powerUseAllowed;
+    // Basis neuer Worktrees und Default-Merge-Ziel; leer = ausgecheckter Branch.
+    [ObservableProperty] private string _baseBranch = "";
     // Dropdown hidden entirely when no ticket-system base URL is configured (Settings → Files tab).
     // Icon key into the UI icon library (IconKeyConverter -> "Icon.<key>" StreamGeometry).
     [ObservableProperty] private string _icon = DefaultIcon;
@@ -275,6 +277,7 @@ public sealed partial class ListSettingsModalViewModel : ViewModelBase
             cfg = Agent.LastLoadedListConfig;
             VerifyCommand = cfg?.VerifyCommand ?? "";
             PowerUseAllowed = cfg?.PowerUseAllowed ?? false;
+            BaseBranch = cfg?.BaseBranch ?? "";
         }
         catch (Exception ex)
         {
@@ -377,7 +380,9 @@ public sealed partial class ListSettingsModalViewModel : ViewModelBase
         await Agent.SaveAsync(
             string.IsNullOrWhiteSpace(VerifyCommand) ? null : VerifyCommand,
             ticketProjectId,
-            PowerUseAllowed);
+            PowerUseAllowed,
+            // Always explicit too: "" clears the stored base branch.
+            BaseBranch.Trim());
 
         Saved = true;
         CloseAction?.Invoke();

src/ClaudeDo.Ui/Views/Modals/ListSettingsModalView.axaml

@@ -124,6 +124,14 @@
                            Foreground="{DynamicResource StatusErrorBrush}" FontSize="12" TextWrapping="Wrap"/>
               </StackPanel>
 
+              <StackPanel Spacing="4" IsVisible="{Binding !IsFolder}">
+                <TextBlock Classes="field-label" Text="{loc:Tr modals.listSettings.baseBranch}"/>
+                <TextBox Text="{Binding BaseBranch, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
+                         PlaceholderText="{loc:Tr modals.listSettings.baseBranchPlaceholder}"/>
+                <TextBlock Text="{loc:Tr modals.listSettings.baseBranchHint}"
+                           Opacity="0.6" FontSize="12" TextWrapping="Wrap"/>
+              </StackPanel>
+
               <StackPanel Spacing="4" IsVisible="{Binding !IsFolder}">
                 <TextBlock Classes="field-label" Text="{loc:Tr modals.listSettings.defaultCommitType}"/>
                 <ComboBox ItemsSource="{Binding CommitTypeOptions}"