Show the mark of the last tested commit once a bisect is done

Once git has nothing left to test, the commit that the user marked last
stays the current commit. The commits view labels it "<-- current",
although git doesn't want the user to test it any more. Show its mark
instead, like for the other marked commits.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

pkg/gui/presentation/commits.go

@@ -357,7 +357,7 @@ func getBisectStatus(index int, commitHash string, bisectInfo *git_commands.Bise
 		return BisectStatusNone
 	}
 
-	if bisectInfo.GetCurrentHash() == commitHash {
+	if bisectInfo.HasCommitToTest() && bisectInfo.GetCurrentHash() == commitHash {
 		return BisectStatusCurrent
 	}
 

pkg/integration/tests/bisect/select_first_bad_commit.go

@@ -38,10 +38,7 @@ var SelectFirstBadCommit = NewIntegrationTest(NewIntegrationTestArgs{
 				Contains("CI commit-10"),
 				Contains("CI commit-09"),
 				Contains("CI commit-08").Contains("<-- bad").IsSelected(),
-				/* EXPECTED:
 				Contains("CI commit-07").Contains("<-- good"),
-				ACTUAL: */
-				Contains("CI commit-07").Contains("<-- current"),
 				Contains("CI commit-06"),
 				Contains("CI commit-05").Contains("<-- good"),
 			)