fix(ui): F8-04b e2e — viewport-agnostic nav + refresh after create

- lobby-create-screen: call lobbyData.refresh() after a successful
  POST so the new game shows up in the private-games panel
  immediately. The shared lobby-data store is otherwise lazy
  (ensure-on-first-mount), which rendered a stale list across the
  post-create navigation in the e2e suite.
- e2e tests that move between lobby sub-panels now go through
  `window.__galaxyNav.go(...)` rather than clicking the sidebar
  items. The mobile sidebar tucks the submenu behind a dropdown, so
  testid-based clicks fail on the mobile-iphone-13 / pixel-5
  viewports — the dev nav surface bypasses that UX (which has its
  own coverage in `lobby-tier-gate` / future submenu specs).
- game-shell-map missing-membership test: assert
  `lobby-account-name` instead of `lobby-create-button` on
  drop-back-to-lobby (the button moved into the paid-only
  private-games sub-panel; the identity strip is the constant lobby
  chrome).
- inspector-ship-group + ship-group-send synthetic loader specs:
  jump straight to the dev-only `synthetic-reports` top-level
  screen via the dev nav surface before looking for the file
  input (the loader moved off Overview in F8-04b).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

ui/frontend/tests/e2e/game-shell-map.spec.ts

@@ -250,9 +250,12 @@ test("missing-membership game drops back to the lobby with an unavailable toast"
 	);
 
 	// Back on the lobby (game shell unmounted), with the unavailable toast.
+	// F8-04b moved the `create new game` button into the `private games`
+	// sub-panel; the always-present lobby chrome signal is the identity
+	// strip, so assert that instead.
 	await expect(page.getByTestId("toast")).toContainText(
 		"this game is no longer available",
 	);
-	await expect(page.getByTestId("lobby-create-button")).toBeVisible();
+	await expect(page.getByTestId("lobby-account-name")).toBeVisible();
 	await expect(page.getByTestId("game-shell")).toHaveCount(0);
 });