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>

overlay/handback_test.go

@@ -0,0 +1,42 @@
+package overlay_test
+
+import (
+	"testing"
+
+	"github.com/egoist/mygo/ui"
+
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/input"
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/overlay"
+)
+
+func TestDialogsHandTheFocusBack(t *testing.T) {
+	kinds := map[string]func(c *ui.Context, open *bool){
+		"confirm": func(c *ui.Context, open *bool) {
+			overlay.ConfirmDialog(c, "Sure?", open, overlay.ConfirmDialogOptions{})
+		},
+		"choice": func(c *ui.Context, open *bool) {
+			overlay.ChoicePrompt(c, "Pick", []string{"A", "B"}, open, overlay.ChoicePromptOptions{})
+		},
+		"prompt": func(c *ui.Context, open *bool) {
+			v := ""
+			overlay.PromptDialog(c, "Name", &v, open, overlay.PromptDialogOptions{})
+		},
+		"pause": func(c *ui.Context, open *bool) { overlay.PauseMenu(c, open, overlay.PauseMenuOptions{}) },
+	}
+	for name, show := range kinds {
+		open := false
+		tt := view(500, 400, newClock(), false, func(c *ui.Context) {
+			if input.Button(c, "Opener", input.ButtonOptions{}).Clicked {
+				open = true
+			}
+			show(c, &open)
+		})
+		if err := tt.Click("Opener"); err != nil || !open || tt.Focused("Opener") {
+			t.Fatalf("%s: did not open with the focus inside (%v)", name, err)
+		}
+		tt.Key(0, ui.KeyEscape)
+		if open || !tt.Focused("Opener") {
+			t.Fatalf("%s: Escape left it open or the focus lost", name)
+		}
+	}
+}