Upgrade MyGo to v0.5.5

Elements are now pass-scoped value handles: tests that read bounds
after a frame bind a ui.Handle. pixel tells frames apart by the build
pass's root, since the Tester clock no longer moves on its own.

Fix the regressions the upgrade brought:
- Clipboard reads in input handlers go through c.Services().
- MyGo notes an overlay's opener after building it, so AutoFocus
  inside lost it; pixel.AutoFocus focuses through a Handle, and
  archtest bans the raw call. Dialogs hand the focus back again.
- Elements around a press stay hovered: Tooltip tells a press-given
  focus by focus arriving under the pointer.
- The web host moves the Tester clock with real time, at most 500 ms
  a call, and gives components the real clock.

The gallery's source index also accepts CRLF checkouts.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

datetime/agenda.go

@@ -13,7 +13,7 @@ import (
 type AgendaOptions struct{}
 
 // Agenda groups events by day, earliest first.
-func Agenda(c *ui.Context, events []Event, o AgendaOptions) *ui.Element {
+func Agenda(c *ui.Context, events []Event, o AgendaOptions) ui.Element {
 	k := pixel.K(c)
 	sorted := slices.Clone(events)
 	slices.SortStableFunc(sorted, func(a, b Event) int { return a.Start.Compare(b.Start) })

datetime/alarm.go

@@ -23,7 +23,7 @@ type AlarmOptions struct {
 }
 
 type AlarmResult struct {
-	Element *ui.Element
+	Element ui.Element
 	Changed bool
 }
 

datetime/analogclock.go

@@ -15,7 +15,7 @@ type AnalogClockOptions struct {
 }
 
 // AnalogClock ticks each second; its hands are Bresenham lines.
-func AnalogClock(c *ui.Context, o AnalogClockOptions) *ui.Element {
+func AnalogClock(c *ui.Context, o AnalogClockOptions) ui.Element {
 	k := pixel.K(c)
 	size := pixel.Or("AnalogClock Size", o.Size, 48)
 	// Wake on the next whole second.

datetime/calendar.go

@@ -12,7 +12,7 @@ type CalendarOptions struct {
 }
 
 type CalendarResult struct {
-	Element *ui.Element
+	Element ui.Element
 	// Picked is a click, Enter or Space on a day.
 	Changed, Picked bool
 }

datetime/clocks_test.go

@@ -169,7 +169,7 @@ func TestRelativeTimeAsksForTheNextMinute(t *testing.T) {
 	at := clk.t.Add(-90 * time.Second)
 	tt := view(300, 60, clk, false, func(c *ui.Context) { datetime.RelativeTime(c, at, datetime.RelativeTimeOptions{}) })
 	pixel.ResetDue()
-	before := time.Now()
+	before := tt.Now()
 	tt.Frame()
 	// The words change at two minutes: thirty seconds on.
 	if wait := pixel.Due().Sub(before); wait < 29*time.Second || wait > 31*time.Second {

datetime/countdown.go

@@ -12,7 +12,7 @@ import (
 type CountdownOptions struct{}
 
 type CountdownResult struct {
-	Element *ui.Element
+	Element ui.Element
 	// Done is true in the frame time runs out.
 	Done bool
 }

datetime/dateinput.go

@@ -15,7 +15,7 @@ type DateInputOptions struct {
 }
 
 type DateInputResult struct {
-	Element *ui.Element
+	Element ui.Element
 	Changed bool
 }
 
@@ -28,7 +28,7 @@ type popping struct{ open, held bool }
 func DateInput(c *ui.Context, text string, date *time.Time, o DateInputOptions) DateInputResult {
 	k := pixel.K(c)
 	old := *date
-	shell, base, st := pixel.Shell(c, func() *ui.Element {
+	shell, base, st := pixel.Shell(c, func() ui.Element {
 		return ui.ButtonBase(c).Role(ui.RolePopUpButton).Label(text).Disabled(o.Disabled)
 	})
 	pop := ui.Local(base, dateKey{}, func() popping { return popping{} })
@@ -53,7 +53,7 @@ func DateInput(c *ui.Context, text string, date *time.Time, o DateInputOptions)
 		g.Sprite(g.W-icon.Calendar.W-4, (g.H-icon.Calendar.H)/2, icon.Calendar, 0, pixel.Faint, 1)
 		g.Finish(st)
 	})
-	ui.PopoverBase(c, base, open, func(panel *ui.Element) {
+	ui.PopoverBase(c, base, open, func(panel ui.Element) {
 		panel.Padding(k.D(5)).Draw(func(p *ui.Painter, r ui.Rect) {
 			g := k.Canvas(p, r)
 			g.Frame(0, 0, g.W, g.H, pixel.Window, pixel.Face)

datetime/daterange.go

@@ -12,7 +12,7 @@ type DateRangeOptions struct {
 }
 
 type DateRangeResult struct {
-	Element *ui.Element
+	Element ui.Element
 	Changed bool
 }
 

datetime/dayschedule.go

@@ -19,7 +19,7 @@ type DayScheduleOptions struct {
 const hourH, gutter = pixel.LineHeight + 4, 24
 
 // DaySchedule places events on hour rows by start and length.
-func DaySchedule(c *ui.Context, events []Event, o DayScheduleOptions) *ui.Element {
+func DaySchedule(c *ui.Context, events []Event, o DayScheduleOptions) ui.Element {
 	k := pixel.K(c)
 	from, to := o.From, o.To
 	if from == 0 && to == 0 {

datetime/digitalclock.go

@@ -16,7 +16,7 @@ type DigitalClockOptions struct {
 }
 
 // DigitalClock shows HH:MM:SS in seven segments; colons blink.
-func DigitalClock(c *ui.Context, o DigitalClockOptions) *ui.Element {
+func DigitalClock(c *ui.Context, o DigitalClockOptions) ui.Element {
 	k := pixel.K(c)
 	sc := pixel.Or("DigitalClock Scale", o.Scale, 2)
 	if sc > 4 {

datetime/eventchip.go

@@ -12,7 +12,7 @@ type EventChipOptions struct {
 }
 
 // EventChip is a small chip with time and title.
-func EventChip(c *ui.Context, e Event, o EventChipOptions) *ui.Element {
+func EventChip(c *ui.Context, e Event, o EventChipOptions) ui.Element {
 	k := pixel.K(c)
 	edge := o.Slot
 	if edge == 0 {

datetime/grid.go

@@ -27,7 +27,7 @@ func addMonths(t time.Time, n int) time.Time {
 }
 
 // month moves *cur by keys; clicks, Enter and Space pick.
-func month(c *ui.Context, text string, cur *time.Time, disabled, focus bool, mark func(time.Time) look) (e, grid *ui.Element, picked bool) {
+func month(c *ui.Context, text string, cur *time.Time, disabled, focus bool, mark func(time.Time) look) (e, grid ui.Element, picked bool) {
 	k := pixel.K(c)
 	e = ui.Column(c).Gap(k.D(2)).Role(ui.RoleGroup).Label(text)
 	e.Children(func() {
@@ -54,12 +54,12 @@ func month(c *ui.Context, text string, cur *time.Time, disabled, focus bool, mar
 				}
 			}
 		})
-		shell, base, st := pixel.Shell(c, func() *ui.Element {
+		shell, base, st := pixel.Shell(c, func() ui.Element {
 			return ui.Box(c).Focusable().Role(ui.RoleTable).Label(text).Disabled(disabled)
 		})
 		grid = base
 		if focus {
-			base.AutoFocus()
+			pixel.AutoFocus(c, base)
 		}
 		y, m, d := cur.Date()
 		for _, mv := range []struct {

datetime/monthpicker.go

@@ -17,7 +17,7 @@ type MonthPickerOptions struct {
 }
 
 type MonthPickerResult struct {
-	Element *ui.Element
+	Element ui.Element
 	Changed bool
 }
 

datetime/relativetime.go

@@ -15,7 +15,7 @@ type RelativeTimeOptions struct {
 }
 
 // RelativeTime says how long since or until t, each minute.
-func RelativeTime(c *ui.Context, t time.Time, o RelativeTimeOptions) *ui.Element {
+func RelativeTime(c *ui.Context, t time.Time, o RelativeTimeOptions) ui.Element {
 	k := pixel.K(c)
 	ink := o.Slot
 	if ink == 0 {

datetime/seasonwheel.go

@@ -15,7 +15,7 @@ type SeasonWheelOptions struct {
 }
 
 type SeasonWheelResult struct {
-	Element *ui.Element
+	Element ui.Element
 	Changed bool
 }
 
@@ -32,7 +32,7 @@ func SeasonWheel(c *ui.Context, text string, season *pixel.Season, o SeasonWheel
 		panic(fmt.Sprintf("datetime: unknown Season %d", *season))
 	}
 	old := *season
-	shell, base, st := pixel.Shell(c, func() *ui.Element {
+	shell, base, st := pixel.Shell(c, func() ui.Element {
 		return ui.Box(c).Focusable().Role(ui.RoleRadioGroup).Label(text).Disabled(o.Disabled)
 	})
 	if pixel.Shortcut(base, 0, ui.KeyRight) || pixel.Shortcut(base, 0, ui.KeyDown) {

datetime/stopwatch.go

@@ -16,7 +16,7 @@ type StopwatchOptions struct {
 }
 
 type StopwatchResult struct {
-	Element                         *ui.Element
+	Element                         ui.Element
 	Started, Stopped, Lapped, Reset bool
 }
 

datetime/sundial.go

@@ -16,7 +16,7 @@ type SunDialOptions struct {
 }
 
 type SunDialResult struct {
-	Element *ui.Element
+	Element ui.Element
 	Changed bool
 }
 
@@ -30,7 +30,7 @@ func SunDial(c *ui.Context, text string, hour *int, o SunDialOptions) SunDialRes
 		panic(fmt.Sprintf("datetime: SunDial hour %d outside 0–23", *hour))
 	}
 	old := *hour
-	shell, base, st := pixel.Shell(c, func() *ui.Element {
+	shell, base, st := pixel.Shell(c, func() ui.Element {
 		return ui.Box(c).Focusable().Role(ui.RoleSlider).Label(text).Disabled(o.Disabled)
 	})
 	if pixel.Shortcut(base, 0, ui.KeyLeft) {

datetime/timeinput.go

@@ -15,7 +15,7 @@ type TimeInputOptions struct {
 }
 
 type TimeInputResult struct {
-	Element *ui.Element
+	Element ui.Element
 	Changed bool
 }
 
@@ -30,7 +30,7 @@ type timing struct {
 func TimeInput(c *ui.Context, text string, tm *time.Time, o TimeInputOptions) TimeInputResult {
 	k := pixel.K(c)
 	old := *tm
-	shell, base, st := pixel.Shell(c, func() *ui.Element {
+	shell, base, st := pixel.Shell(c, func() ui.Element {
 		return ui.Box(c).Focusable().Role(ui.RoleTextField).Label(text).Disabled(o.Disabled)
 	})
 	s := ui.Local(base, timeKey{}, func() timing { return timing{first: -1} })

datetime/timer.go

@@ -16,7 +16,7 @@ type TimerOptions struct {
 }
 
 type TimerResult struct {
-	Element *ui.Element
+	Element ui.Element
 	// Done is true in the frame the time runs out.
 	Done bool
 }

datetime/views_test.go

@@ -238,7 +238,7 @@ func TestTodayMarksMoveAtMidnight(t *testing.T) {
 	} {
 		tt := view(600, 400, clk, false, build)
 		pixel.ResetDue()
-		before := time.Now()
+		before := tt.Now()
 		tt.Frame()
 		if due := pixel.Due(); due.IsZero() || due.Sub(before) > 2*time.Second {
 			t.Fatalf("%s: no rebuild asked for midnight, due %v", name, due)
@@ -264,7 +264,7 @@ func TestRelativeTimeRoundsTheFutureUp(t *testing.T) {
 		at := clk.t.Add(tc.ahead)
 		tt := view(300, 60, clk, false, func(c *ui.Context) { datetime.RelativeTime(c, at, datetime.RelativeTimeOptions{}) })
 		pixel.ResetDue()
-		before := time.Now()
+		before := tt.Now()
 		tt.Frame()
 		if wait := pixel.Due().Sub(before); !shows(tt, tc.words) || wait < tc.wait-time.Second || wait > tc.wait+time.Second {
 			t.Fatalf("%v ahead: %q, next repaint in %v", tc.ahead, tt.Texts(), wait)

datetime/weekstrip.go

@@ -15,7 +15,7 @@ type WeekStripOptions struct {
 }
 
 type WeekStripResult struct {
-	Element *ui.Element
+	Element ui.Element
 	Changed bool
 }
 
@@ -26,7 +26,7 @@ const dayW, dayH = 22, 2 * pixel.LineHeight
 func WeekStrip(c *ui.Context, text string, date *time.Time, o WeekStripOptions) WeekStripResult {
 	k := pixel.K(c)
 	old := *date
-	shell, base, st := pixel.Shell(c, func() *ui.Element {
+	shell, base, st := pixel.Shell(c, func() ui.Element {
 		return ui.Box(c).Focusable().Role(ui.RoleGroup).Label(text).Disabled(o.Disabled)
 	})
 	if pixel.Shortcut(base, 0, ui.KeyLeft) {

datetime/yearpicker.go

@@ -15,7 +15,7 @@ type YearPickerOptions struct {
 }
 
 type YearPickerResult struct {
-	Element *ui.Element
+	Element ui.Element
 	Changed bool
 }
 

datetime/yearview.go

@@ -15,7 +15,7 @@ type YearViewOptions struct{}
 const miniW, miniH, monthW, monthH = 10, 7, 7*miniW + 4, 6*miniH + pixel.LineHeight + 2
 
 // YearView sets a year's twelve months small; today is marked.
-func YearView(c *ui.Context, year int, o YearViewOptions) *ui.Element {
+func YearView(c *ui.Context, year int, o YearViewOptions) ui.Element {
 	k := pixel.K(c)
 	now := today(c, k)
 	return ui.Box(c).Size(k.D(4*monthW), k.D(3*monthH)).Role(ui.RoleImage).Label(strconv.Itoa(year)).Draw(func(p *ui.Painter, r ui.Rect) {