fix(tui): restore filters on cancel

tui/tui.go

@@ -429,6 +429,7 @@ type model struct {
 	width          int
 	height         int
 	query          string
+	savedQuery     string
 	filterMode     bool
 	focus          paneFocus
 	contextOffset  int
@@ -650,7 +651,13 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 			switch typed.String() {
 			case "ctrl+c", "ctrl+d", "q":
 				return m, tea.Quit
-			case "enter", "esc":
+			case "enter":
+				m.filterMode = false
+			case "esc":
+				if m.query != m.savedQuery {
+					m.query = m.savedQuery
+					m.applyFilter()
+				}
 				m.filterMode = false
 			case "backspace":
 				if len(m.query) > 0 {
@@ -1149,6 +1156,7 @@ func (m *model) runMenuAction(action menuAction) tea.Cmd {
 
 func (m *model) startFilter() {
 	m.closeMenu()
+	m.savedQuery = m.query
 	m.filterMode = true
 }
 

tui/tui_test.go

@@ -313,6 +313,34 @@ func TestQQuitsFromMenuAndFilterModes(t *testing.T) {
 	}
 }
 
+func TestFilterEscRestoresPreviousQuery(t *testing.T) {
+	m := newModel(Options{
+		Title: "archive",
+		Items: []Item{
+			{Title: "alpha"},
+			{Title: "beta"},
+			{Title: "alphabet"},
+		},
+	})
+	m.query = "alpha"
+	m.applyFilter()
+	if len(m.filtered) != 2 {
+		t.Fatalf("initial filtered rows = %d, want 2", len(m.filtered))
+	}
+	updated, _ := m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'/'}})
+	m = updated.(model)
+	updated, _ = m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'b'}})
+	m = updated.(model)
+	if m.query != "alphab" || len(m.filtered) != 1 {
+		t.Fatalf("draft query/filter = %q/%d", m.query, len(m.filtered))
+	}
+	updated, _ = m.Update(tea.KeyMsg{Type: tea.KeyEsc})
+	m = updated.(model)
+	if m.filterMode || m.query != "alpha" || len(m.filtered) != 2 {
+		t.Fatalf("esc should restore query/filter, mode=%v query=%q filtered=%d", m.filterMode, m.query, len(m.filtered))
+	}
+}
+
 func TestInitialTerminalSizeCanUseTallPane(t *testing.T) {
 	m := newModel(Options{Title: "archive", Items: []Item{{Title: "alpha"}}})
 	m.width = 84