Harden phone entry click state

main.go

@@ -645,13 +645,21 @@ func (u *ui) filter() {
 		return
 	}
 	u.visible = visible
-	if len(u.entryClicks) < len(u.visible) {
+	u.ensureEntryClicks()
-		u.entryClicks = make([]widget.Clickable, len(u.visible))
+}
+
+func (u *ui) ensureEntryClicks() {
+	if len(u.entryClicks) >= len(u.visible) {
+		return
 	}
+	next := make([]widget.Clickable, len(u.visible))
+	copy(next, u.entryClicks)
+	u.entryClicks = next
 }
 
 func (u *ui) visibleEntrySnapshot() ([]entry, []*widget.Clickable) {
 	visible := append([]entry(nil), u.visible...)
+	u.ensureEntryClicks()
 	clicks := make([]*widget.Clickable, len(visible))
 	for i := range visible {
 		clicks[i] = &u.entryClicks[i]

main_test.go

@@ -849,6 +849,28 @@ func TestUIVisibleEntrySnapshotIsStableAfterVisibleMutation(t *testing.T) {
 	}
 }
 
+func TestUIVisibleEntrySnapshotRegrowsClickableState(t *testing.T) {
+	t.Parallel()
+
+	u := newUIWithModel("phone", vault.Model{
+		Entries: []vault.Entry{
+			{ID: "1", Title: "Alpha", Path: []string{"Crew", "Internet"}},
+			{ID: "2", Title: "Beta", Path: []string{"Crew", "Internet"}},
+		},
+	})
+	u.state.NavigateToPath([]string{"Crew", "Internet"})
+	u.filter()
+	u.entryClicks = u.entryClicks[:1]
+
+	visible, clicks := u.visibleEntrySnapshot()
+	if len(visible) != 2 || len(clicks) != 2 {
+		t.Fatalf("snapshot lengths = (%d, %d), want (2, 2)", len(visible), len(clicks))
+	}
+	if clicks[1] == nil {
+		t.Fatal("regrown click pointer = nil, want usable clickable state")
+	}
+}
+
 func TestUIPhoneBackReturnsFromSubscreenToEntries(t *testing.T) {
 	t.Parallel()