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/plugins/ai-moderation/src/descriptor.ts

@@ -0,0 +1,33 @@
+/**
+ * AI Moderation Plugin Descriptor
+ */
+
+import type { PluginDescriptor } from "emdash";
+
+import type { Category } from "./categories.js";
+
+export interface AIModerationOptions {
+	/** Override default categories */
+	categories?: Category[];
+	/** Auto-approve comments that pass AI checks (default: true) */
+	autoApproveClean?: boolean;
+	/** Workers AI binding name (default: "AI") */
+	aiBinding?: string;
+}
+
+/**
+ * Create the AI moderation plugin descriptor.
+ */
+export function aiModerationPlugin(
+	options: AIModerationOptions = {},
+): PluginDescriptor<AIModerationOptions> {
+	return {
+		id: "ai-moderation",
+		version: "0.1.0",
+		entrypoint: "@emdash-cms/plugin-ai-moderation/plugin",
+		options,
+		adminEntry: "@emdash-cms/plugin-ai-moderation/admin",
+		adminPages: [{ path: "/settings", label: "AI Moderation", icon: "shield" }],
+		adminWidgets: [{ id: "status", title: "AI Moderation", size: "third" }],
+	};
+}