fix: add x-panel-version header (#4855)

packages/api-client/src/features/panel-version.ts

@@ -0,0 +1,18 @@
+import { AbstractFeature } from '../core/abstract-feature'
+import type { RequestContext } from '../types/request'
+
+export const PANEL_VERSION = 1
+
+export class PanelVersionFeature extends AbstractFeature {
+	async execute<T>(next: () => Promise<T>, context: RequestContext): Promise<T> {
+		context.options.headers = {
+			...context.options.headers,
+			'X-Panel-Version': String(PANEL_VERSION),
+		}
+		return next()
+	}
+
+	shouldApply(_: RequestContext): boolean {
+		return true
+	}
+}