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/vitest.config.ts

@@ -0,0 +1,24 @@
+import react from "@vitejs/plugin-react";
+import { playwright } from "@vitest/browser-playwright";
+import { defineConfig } from "vitest/config";
+
+export default defineConfig({
+	plugins: [
+		react({
+			babel: {
+				plugins: ["@lingui/babel-plugin-lingui-macro"],
+			},
+		}),
+	],
+	test: {
+		globals: true,
+		include: ["tests/**/*.test.{ts,tsx}"],
+		setupFiles: ["./tests/setup.ts"],
+		browser: {
+			enabled: true,
+			provider: playwright(),
+			instances: [{ browser: "chromium" }],
+			headless: true,
+		},
+	},
+});