Enhance MCP client to append structuredContent

Updates the MCP HTTP client to append structuredContent as JSON to the textual output if provided by the server. Also bumps @modelcontextprotocol/sdk dependency to version 1.21.1.

Author: gary149

package.json

@@ -69,7 +69,7 @@
 		"@elysiajs/swagger": "^1.3.0",
 		"@huggingface/hub": "^2.2.0",
 		"@huggingface/inference": "^4.11.3",
-		"@modelcontextprotocol/sdk": "^1.21.0",
+		"@modelcontextprotocol/sdk": "^1.21.1",
 		"@iconify-json/bi": "^1.1.21",
 		"@resvg/resvg-js": "^2.6.2",
 		"autoprefixer": "^10.4.14",

src/lib/server/mcp/httpClient.ts

@@ -78,5 +78,14 @@ export async function callMcpTool(
 			return obj["type"] === "text" && typeof obj["text"] === "string";
 		})
 		.map((p) => p.text);
-	return textParts.join("\n");
+
+	// Minimal enhancement: if the server provided structuredContent, append its JSON
+	// to the textual output so downstream consumers can optionally parse it.
+	const text = textParts.join("\n");
+	const structured = (response as unknown as { structuredContent?: unknown })?.structuredContent;
+	if (structured !== undefined) {
+		const json = typeof structured === "string" ? structured : JSON.stringify(structured);
+		return text ? `${text}\n\n${json}` : json;
+	}
+	return text;
 }