Frontend changes for library panels feature (#30653)

Co-authored-by: Hugo Häggmark <hugo.haggmark@gmail.com>

public/app/features/dashboard/state/PanelModel.ts

@@ -36,6 +36,7 @@ import {
   isStandardFieldProp,
   restoreCustomOverrideRules,
 } from './getPanelOptionsWithDefaults';
+import { LibraryPanelDTO } from 'app/features/library-panels/state/api';
 
 export interface GridPos {
   x: number;
@@ -98,6 +99,7 @@ const mustKeepProps: { [str: string]: boolean } = {
   maxDataPoints: true,
   interval: true,
   replaceVariables: true,
+  libraryPanel: true,
 };
 
 const defaults: any = {
@@ -149,6 +151,8 @@ export class PanelModel implements DataConfigSource {
   links?: DataLink[];
   transparent: boolean;
 
+  libraryPanel?: { uid: undefined; name: string } | Pick<LibraryPanelDTO, 'uid' | 'name' | 'meta'>;
+
   // non persisted
   isViewing: boolean;
   isEditing: boolean;
@@ -531,6 +535,10 @@ function getPluginVersion(plugin: PanelPlugin): string {
   return plugin && plugin.meta.info.version ? plugin.meta.info.version : config.buildInfo.version;
 }
 
+export function isLibraryPanel(panel: PanelModel): panel is PanelModel & Required<Pick<PanelModel, 'libraryPanel'>> {
+  return panel.libraryPanel !== undefined;
+}
+
 interface PanelOptionsCache {
   properties: any;
   fieldConfig: FieldConfigSource;