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>

project/roadmap.go

@@ -36,7 +36,7 @@ var capSlots = []pixel.Slot{pixel.Info, pixel.Good, pixel.Warn, pixel.Magic, pix
 const laneH = pixel.LineHeight + 8
 
 // Roadmap lays bars on lanes under months, from from's.
-func Roadmap(c *ui.Context, text string, from time.Time, lanes []Lane, o RoadmapOptions) *ui.Element {
+func Roadmap(c *ui.Context, text string, from time.Time, lanes []Lane, o RoadmapOptions) ui.Element {
 	k := pixel.K(c)
 	months, mw := pixel.Or("Roadmap Months", o.Months, 6), pixel.Or("Roadmap MonthWidth", o.MonthWidth, 44)
 	if len(lanes) == 0 || months > 120 {