Add a test showing that a current bisect commit far down isn't selected

The commits view loads the first 300 commits only. If the range to
bisect is longer than about 600 commits, the commit that git wants the
user to test is further down than that. It isn't loaded, so we can't
select it.

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

pkg/integration/tests/bisect/select_current_commit_in_long_range.go

@@ -0,0 +1,31 @@
+package bisect
+
+import (
+	"fmt"
+
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var SelectCurrentCommitInLongRange = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "Select the current bisect commit when it is further down than the commits that we load at first",
+	ExtraCmdArgs: []string{},
+	Skip:         false,
+	SetupRepo: func(shell *Shell) {
+		for i := range 700 {
+			shell.EmptyCommit(fmt.Sprintf("commit %03d", i+1))
+		}
+		shell.StartBisect("HEAD", "HEAD~699")
+	},
+	SetupConfig: func(cfg *config.AppConfig) {
+		cfg.GetUserConfig().Git.Log.ShowGraph = "never"
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		t.Views().Commits().
+			Focus().
+			/* EXPECTED:
+			SelectedLine(Contains("<-- current"))
+			ACTUAL: */
+			SelectedLine(Contains("commit 700"))
+	},
+})

pkg/integration/tests/test_list.go

@@ -40,6 +40,7 @@ var tests = []*components.IntegrationTest{
 	bisect.ChooseTerms,
 	bisect.FromOtherBranch,
 	bisect.SelectCurrentCommit,
+	bisect.SelectCurrentCommitInLongRange,
 	bisect.Skip,
 	branch.CheckoutAutostash,
 	branch.CheckoutByName,