Fix modal history

src/app/components/SpaceAdd.svelte

@@ -1,9 +1,12 @@
 <script lang="ts">
   import CardButton from '@lib/components/CardButton.svelte'
   import SpaceCreate from '@app/components/SpaceCreate.svelte'
+  import SpaceJoin from '@app/components/SpaceJoin.svelte'
   import {pushModal} from '@app/modal'
 
   const startCreate = () => pushModal(SpaceCreate)
+
+  const startJoin = () => pushModal(SpaceJoin)
 </script>
 
 <div class="column gap-4">
@@ -14,7 +17,7 @@
   </CardButton>
   <div class="card column gap-4">
     <h2 class="subheading">Have an invite?</h2>
-    <button class="btn btn-primary">
+    <button class="btn btn-primary" on:click={startJoin}>
       Join a Space
     </button>
   </div>