Emdash source with visual editor image upload fix

Fixes:
1. media.ts: wrap placeholder generation in try-catch
2. toolbar.ts: check r.ok, display error message in popover

packages/admin/tests/utils/render.tsx

@@ -0,0 +1,18 @@
+import { i18n } from "@lingui/core";
+import { I18nProvider } from "@lingui/react";
+import * as React from "react";
+import { render as baseRender, type ComponentRenderOptions } from "vitest-browser-react";
+
+type RenderWrapper = ComponentRenderOptions["wrapper"];
+
+const I18nWrapper = (InnerWrapper: RenderWrapper = React.Fragment) => {
+	return ({ children }: React.PropsWithChildren) => (
+		<I18nProvider i18n={i18n}>
+			<InnerWrapper>{children}</InnerWrapper>
+		</I18nProvider>
+	);
+};
+
+export const render: typeof baseRender = (ui, { wrapper: UserWrapper, ...options } = {}) => {
+	return baseRender(ui, { ...options, wrapper: I18nWrapper(UserWrapper) });
+};