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

playwright.config.ts

@@ -0,0 +1,38 @@
+import { defineConfig, devices } from "@playwright/test";
+
+/**
+ * Playwright E2E test configuration for EmDash CMS
+ *
+ * Tests run against an isolated fixture (not a demo app).
+ * Global setup creates a temp directory, starts a fresh dev server,
+ * runs setup via dev-bypass, and seeds collections with test data.
+ * Port 4444 is used to avoid conflicts with development servers.
+ */
+export default defineConfig({
+	testDir: "./e2e/tests",
+	// Disable parallel to avoid shared database state issues
+	fullyParallel: false,
+	workers: 1,
+	forbidOnly: !!process.env.CI,
+	retries: process.env.CI ? 1 : 0,
+	reporter: "html",
+	timeout: 30000,
+
+	globalSetup: "./e2e/global-setup.ts",
+	globalTeardown: "./e2e/global-teardown.ts",
+
+	use: {
+		baseURL: "http://localhost:4444",
+		trace: "on-first-retry",
+		screenshot: "only-on-failure",
+	},
+
+	projects: [
+		{
+			name: "chromium",
+			use: { ...devices["Desktop Chrome"] },
+		},
+	],
+
+	// No webServer — global-setup.ts handles server lifecycle
+});