feat(worktrees): add ForceRemoveAsync for targeted removal

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/ClaudeDo.Worker/Worktrees/WorktreeMaintenanceService.cs

@@ -9,6 +9,7 @@ public sealed class WorktreeMaintenanceService
 {
     public sealed record CleanupResult(int Removed);
     public sealed record ResetResult(int Removed, int TasksAffected, bool Blocked, int RunningTasks);
+    public sealed record ForceRemoveResult(bool Removed, string? Reason);
 
     private readonly IDbContextFactory<ClaudeDoDbContext> _dbFactory;
     private readonly GitService _git;
@@ -95,6 +96,29 @@ public sealed class WorktreeMaintenanceService
             PathExistsOnDisk: !string.IsNullOrWhiteSpace(x.Path) && Directory.Exists(x.Path))).ToList();
     }
 
+    public async Task<ForceRemoveResult> ForceRemoveAsync(string taskId, CancellationToken ct = default)
+    {
+        using var context = _dbFactory.CreateDbContext();
+
+        var row = await (from w in context.Worktrees
+                         join t in context.Tasks on w.TaskId equals t.Id
+                         join l in context.Lists on t.ListId equals l.Id
+                         where w.TaskId == taskId
+                         select new { Row = new WorktreeRow(w.TaskId, w.Path, w.BranchName, l.WorkingDir),
+                                      Status = t.Status })
+                        .AsNoTracking()
+                        .FirstOrDefaultAsync(ct);
+
+        if (row is null)
+            return new ForceRemoveResult(false, "worktree not found");
+
+        if (row.Status == ClaudeDo.Data.Models.TaskStatus.Running)
+            return new ForceRemoveResult(false, "task is currently running");
+
+        var ok = await TryRemoveAsync(row.Row, force: true, ct);
+        return new ForceRemoveResult(ok, ok ? null : "remove failed");
+    }
+
     private async Task<bool> TryRemoveAsync(WorktreeRow row, bool force, CancellationToken ct)
     {
         var repoDirExists = !string.IsNullOrWhiteSpace(row.WorkingDir) && Directory.Exists(row.WorkingDir);