test(device): submit the link popover with a real Enter key press

Review question: why not hit the Enter key instead of requestSubmit()?
No good reason — a W3C protocol Enter is trusted input, so the browser
runs its default action and the whole real path is exercised: key press,
implicit form submission, the popover's submit handling. requestSubmit()
skipped the key half. (The old dispatched KeyboardEvent was the thing
that couldn't work: synthetic events trigger no default action.) The
on-screen keyboard's own action button remains unreachable and stays on
the manual release checklist.

Author: YousefED

tests/device/linkPopover.ts

@@ -71,26 +71,22 @@ export async function openLinkPopover(session: DeviceSession): Promise<void> {
 }
 
 /**
- * Types into a popover field and submits it the way the browser does:
- * `requestSubmit()` on the enclosing form, which runs the popover's real
- * `onSubmit` wiring. A dispatched Enter keydown cannot do this — synthetic
- * events trigger no default action, and the popovers commit through the
- * form's `submit` event rather than key handlers. Tapping the on-screen
- * keyboard's action key isn't an option either: no automation channel
- * reaches it (see the README) — which also means the IME's own choice of
- * action stays a manual release check.
+ * Types into a popover field and submits it by pressing Enter — a W3C
+ * protocol key event, which is *trusted* input: the browser runs its default
+ * action, so this exercises the real path end to end (Enter -> implicit form
+ * submission -> the popover's `submit` handling). A dispatched
+ * `KeyboardEvent` cannot do that (synthetic events trigger no default
+ * action), and `requestSubmit()` would skip the key half of the path.
+ *
+ * What this still cannot press is the on-screen keyboard's own action
+ * button — no automation channel reaches it (see the README) — so the IME's
+ * choice of action stays a manual release check.
  */
 export async function typeAndSubmit(
   session: DeviceSession,
   css: string,
   text: string,
 ): Promise<void> {
   await session.elementValue(css, text);
-  await session.exec(
-    `const el = document.querySelector(arguments[0]);
-     if (el && el.form) {
-       el.form.requestSubmit();
-     }`,
-    [css],
-  );
+  await session.typeKeys("\uE007");
 }