feat: add agent query API (#130)

apps/freya-backend/src/session/user-session.ts

@@ -1,4 +1,10 @@
-import { FeedEngine, type FeedItem, type FeedResult, type FeedSource } from "@freya/core"
+import {
+	FeedEngine,
+	type ActionDefinition,
+	type FeedItem,
+	type FeedResult,
+	type FeedSource,
+} from "@freya/core"
 
 import type { FeedEnhancer } from "../enhancement/enhance-feed.ts"
 
@@ -73,6 +79,21 @@ export class UserSession {
 		return this.sources.has(sourceId)
 	}
 
+	async listActions(): Promise<
+		Array<{ sourceId: string; actions: Record<string, ActionDefinition> }>
+	> {
+		const result: Array<{ sourceId: string; actions: Record<string, ActionDefinition> }> = []
+
+		for (const [sourceId, source] of this.sources) {
+			result.push({
+				sourceId,
+				actions: await source.listActions(),
+			})
+		}
+
+		return result
+	}
+
 	/**
 	 * Registers a new source in the engine and invalidates all caches.
 	 * Stops and restarts the engine to establish reactive subscriptions.