fix(worker): kept worktree in a company repo opens a PR, unexpected ADO/git errors never fail a task start

tests/ClaudeDo.Worker.Tests/AzureDevOps/CompanyApproveTests.cs

@@ -158,6 +158,22 @@ public sealed class CompanyApproveTests : IDisposable
         Assert.StartsWith("Resolves [#412](https://ticket.fb-tuning.local/board/project/393/ticket/412)", description);
     }
 
+    [Fact]
+    public async Task Approve_KeptWorktree_OpensPrInsteadOfMergingLocally()
+    {
+        if (!GitRepoFixture.IsGitAvailable()) return;
+        await SetUpWorktree();
+        using (var ctx = _db.CreateContext())
+            await new WorktreeRepository(ctx).SetStateAsync("t1", WorktreeState.Kept);
+        var mainBefore = GitRepoFixture.RunGit(_repo.RepoDir, "rev-parse", "main").Trim();
+
+        var r = await Merge(Ado()).ApproveAndMergeAsync("t1", "", default);
+
+        Assert.Equal(TaskMergeService.StatusPrCreated, r.Status);
+        Assert.Equal(mainBefore, GitRepoFixture.RunGit(_repo.RepoDir, "rev-parse", "main").Trim());
+        Assert.Equal(WorktreeState.Active, (await Rows()).Wt.State);
+    }
+
     [Fact]
     public async Task Approve_ReusesActivePr_AsUpdate()
     {