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>

navigation/worldmap.go

@@ -46,7 +46,7 @@ type WorldMapOptions struct {
 }
 
 type WorldMapResult struct {
-	Element *ui.Element
+	Element ui.Element
 	// Entered reports Enter, or a click, at the hero's node.
 	Changed, Entered bool
 }
@@ -66,7 +66,7 @@ func WorldMap(c *ui.Context, text string, nodes []MapNode, paths [][2]int, at *i
 		panic(fmt.Sprintf("navigation: node %d of %d", *at, len(nodes)))
 	}
 	w, h := pixel.Or("WorldMap Width", o.Width, 240), pixel.Or("WorldMap Height", o.Height, 140)
-	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).Description(nodes[*at].Name).Disabled(o.Disabled)
 	})
 	wk := ui.Local(base, walkKey{}, func() walk { return walk{from: *at} })