Match worktree branch names in the Worktrees pane filter

The Worktrees pane's '/' filter only matched the worktree name, so
searching a branch name — the natural way to find the worktree that
has it checked out — returned nothing (#5945).

The filter fields now include the worktree's branch alongside its
name. Based on the patch attached to the issue by @phanirithvij
(adapted: comment added, regression test added).

pkg/gui/context/worktrees_context.go

@@ -16,8 +16,10 @@ var _ types.IListContext = (*WorktreesContext)(nil)
 func NewWorktreesContext(c *ContextCommon) *WorktreesContext {
 	viewModel := NewFilteredListViewModel(
 		func() []*models.Worktree { return c.Model().Worktrees },
-		func(Worktree *models.Worktree) []string {
-			return []string{Worktree.Name}
+		// Filtering matches the worktree name AND its branch, so searching a
+		// branch name surfaces its worktree (#5945).
+		func(worktree *models.Worktree) []string {
+			return []string{worktree.Name, worktree.Branch}
 		},
 	)
 

pkg/gui/context/worktrees_context_test.go

@@ -0,0 +1,73 @@
+package context
+
+import (
+	"os"
+	"testing"
+
+	"github.com/jesseduffield/lazygit/pkg/commands/models"
+	"github.com/stretchr/testify/assert"
+)
+
+// The Worktrees pane's filter matches the worktree name AND its branch, so
+// searching a branch name surfaces its worktree (#5945). Pinned against the
+// real FilteredList the context wires up, using the same getFilterFields
+// shape NewWorktreesContext passes.
+func TestWorktreesFilterMatchesBranchName(t *testing.T) {
+	worktrees := []*models.Worktree{
+		{Name: "frontend", Branch: "feature/login"},
+		{Name: "backend", Branch: "main"},
+		{Name: "docs", Branch: "docs/rewrite"},
+	}
+
+	filtered := NewFilteredList(
+		func() []*models.Worktree { return worktrees },
+		func(worktree *models.Worktree) []string {
+			return []string{worktree.Name, worktree.Branch}
+		},
+	)
+
+	getNames := func() []string {
+		names := make([]string, 0)
+		for _, w := range filtered.GetFilteredList() {
+			names = append(names, w.Name)
+		}
+		return names
+	}
+
+	// By worktree name (unchanged behavior).
+	filtered.SetFilter("front", false)
+	assert.Equal(t, []string{"frontend"}, getNames())
+
+	// By branch name — the #5945 ask.
+	filtered.SetFilter("login", false)
+	assert.Equal(t, []string{"frontend"}, getNames())
+
+	// A branch prefix shared by name and branch fields.
+	filtered.SetFilter("docs", false)
+	assert.Equal(t, []string{"docs"}, getNames())
+
+	// No match clears the list.
+	filtered.SetFilter("nonexistent", false)
+	assert.Empty(t, getNames())
+
+	// Clearing the filter restores everything.
+	filtered.ClearFilter()
+	assert.Len(t, getFilteredListWorktrees(filtered), 3)
+}
+
+func getFilteredListWorktrees(filtered *FilteredList[*models.Worktree]) []*models.Worktree {
+	return filtered.GetFilteredList()
+}
+
+// Source pin: the production context must actually wire the branch into its
+// filter fields — the behavioral test above constructs its own FilteredList,
+// so it cannot detect the wiring regressing.
+func TestWorktreesContextWiresBranchIntoFilterFields(t *testing.T) {
+	source, err := os.ReadFile("worktrees_context.go")
+	if err != nil {
+		t.Fatalf("read worktrees_context.go: %v", err)
+	}
+	assert.Contains(t, string(source),
+		"return []string{worktree.Name, worktree.Branch}",
+		"NewWorktreesContext must include worktree.Branch in getFilterFields (#5945)")
+}