Add lightning node link previews

frontend/src/app/lightning/nodes-channels-map/nodes-channels-map.component.html

@@ -1,4 +1,4 @@
-<div [class]="'full-container ' + style">
+<div [class]="'full-container ' + style + (fitContainer ? ' fit-container' : '')">
 
   <div *ngIf="style === 'graph'" class="card-header">
     <div class="d-flex d-md-block align-items-baseline" style="margin-bottom: -5px">
@@ -8,7 +8,7 @@
   </div>
 
   <div *ngIf="observable$ | async" class="chart" echarts [initOpts]="chartInitOptions" [options]="chartOptions"
-    (chartInit)="onChartInit($event)">
+    (chartInit)="onChartInit($event)" (chartFinished)="onChartFinished($event)">
   </div>
 
 </div>

frontend/src/app/lightning/nodes-channels-map/nodes-channels-map.component.scss

@@ -29,6 +29,18 @@
   min-height: 250px;
 }
 
+.full-container.fit-container {
+  margin: 0;
+  padding: 0;
+  height: 100%;
+  min-height: 100px;
+
+  .chart {
+    padding: 0;
+    min-height: 100px;
+  }
+}
+
 .widget {
   width: 90vw;
   margin-left: auto;

frontend/src/app/lightning/nodes-channels-map/nodes-channels-map.component.ts

@@ -1,4 +1,4 @@
-import { ChangeDetectionStrategy, Component, HostListener, Input, NgZone, OnDestroy, OnInit, ViewChild } from '@angular/core';
+import { ChangeDetectionStrategy, Component, HostListener, Input, Output, EventEmitter, NgZone, OnDestroy, OnInit, ViewChild } from '@angular/core';
 import { SeoService } from 'src/app/services/seo.service';
 import { ApiService } from 'src/app/services/api.service';
 import { Observable, switchMap, tap, zip } from 'rxjs';
@@ -20,9 +20,11 @@ export class NodesChannelsMap implements OnInit, OnDestroy {
   @Input() style: 'graph' | 'nodepage' | 'widget' | 'channelpage' = 'graph';
   @Input() publicKey: string | undefined;
   @Input() channel: any[] = [];
+  @Input() fitContainer = false;
+  @Output() readyEvent = new EventEmitter();
 
   observable$: Observable<any>;
-  
+
   center: number[] | undefined;
   zoom: number | undefined;
   channelWidth = 0.6;
@@ -313,4 +315,8 @@ export class NodesChannelsMap implements OnInit, OnDestroy {
       this.chartInstance.setOption(chartOptions);
     });
   }
+
+  onChartFinished(e) {
+    this.readyEvent.emit();
+  }
 }