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/src/lib/api/email-settings.ts

@@ -0,0 +1,41 @@
+/**
+ * Email settings API client functions
+ */
+
+import { API_BASE, apiFetch, parseApiResponse } from "./client.js";
+
+// =============================================================================
+// Types
+// =============================================================================
+
+export interface EmailProvider {
+	pluginId: string;
+}
+
+export interface EmailSettings {
+	available: boolean;
+	providers: EmailProvider[];
+	selectedProviderId: string | null;
+	middleware: {
+		beforeSend: string[];
+		afterSend: string[];
+	};
+}
+
+// =============================================================================
+// API functions
+// =============================================================================
+
+export async function fetchEmailSettings(): Promise<EmailSettings> {
+	const res = await apiFetch(`${API_BASE}/settings/email`);
+	return parseApiResponse<EmailSettings>(res, "Failed to fetch email settings");
+}
+
+export async function sendTestEmail(to: string): Promise<{ success: boolean; message: string }> {
+	const res = await apiFetch(`${API_BASE}/settings/email`, {
+		method: "POST",
+		headers: { "Content-Type": "application/json" },
+		body: JSON.stringify({ to }),
+	});
+	return parseApiResponse<{ success: boolean; message: string }>(res, "Failed to send test email");
+}