dynamic promo widget

packages/web/src/jsonui/JsonUiLinkButton.svelte

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+<script lang="ts">
+  import FormStyledButton from '../buttons/FormStyledButton.svelte';
+  import { openWebLink } from '../utility/simpleTools';
+
+  export let text: string;
+  export let link: string;
+  export let newTab: boolean = true;
+
+  // very light url guard
+  const safe = /^(https?:)?\/\//i.test(link) || link.startsWith('/');
+</script>
+
+<div class="center">
+  <FormStyledButton on:click={() => openWebLink(link)} value={text} skipWidth />
+</div>
+
+<style>
+  .center {
+    text-align: center;
+  }
+</style>