feat: add license footer

Author: sgratzl

src/components/LeftMenu.svelte

@@ -1,6 +1,6 @@
 <script lang="ts">
   import DataSet from '../data/DataSet';
-  import { datasetTree } from '../store';
+  import { datasetTree, version } from '../store';
   import ImportDataSetsMenu from './ImportDataSetsMenu.svelte';
   import TreeInnerNode from './tree/TreeInnerNode.svelte';
   import TreeLeafNode from './tree/TreeLeafNode.svelte';
@@ -19,17 +19,29 @@
       {/if}
     {/each}
   </div>
+  <div class="credits">
+    <a href="https://github.com/cmu-delphi/www-epivis/releases/v{version}">EpiVis v{version}</a> &copy; {new Date().getFullYear()},
+    Delphi Group<br />
+    <a href="https://github.com/cmu-delphi/www-epivis/">Source Code</a> under
+    <a href="https://github.com/cmu-delphi/www-epivis/blob/main/LICENSE">MIT license</a><br />
+  </div>
 </side>
 
 <style>
   .left {
     padding: 0.5em 1em 0.5em 0.5em;
     border-right: 1px solid grey;
+    display: flex;
+    flex-direction: column;
   }
   .tree {
     margin-top: 1em;
+    flex: 1 1 0;
   }
   .tree > :global(div.tv_node) {
     padding-left: 0 !important;
   }
+  .credits {
+    font-size: 0.75rem;
+  }
 </style>

src/store.ts

@@ -3,6 +3,10 @@ import { NavMode } from './components/chartUtils';
 import DataSet, { DataGroup } from './data/DataSet';
 import deriveLinkDefaults, { getDirectLinkImpl } from './deriveLinkDefaults';
 
+declare const __VERSION__: string;
+
+export const version = __VERSION__;
+
 const defaults = deriveLinkDefaults();
 
 export const datasetTree = writable<DataGroup>(defaults.group);