display client info and unlock errors to user

src/views/Unlock.svelte

@@ -6,6 +6,7 @@
 
     const dispatch = createEventDispatcher();
 
+    let error = null;
     let passphrase = '';
     async function unlock() {
         console.log('invoking unlock command.')
@@ -21,11 +22,14 @@
             }
         }
         catch (e) {
-            console.log('Unlock error:', e);
+            error = e;
         }
     }
 </script>
 
+{#if error}
+    <div class="text-red-400">{error}</div>
+{/if}
 <form action="#" on:submit|preventDefault="{unlock}">
     <div class="text-gray-200">Enter your passphrase:</div>
     <input autofocus class="text-gray-200 bg-zinc-800" type="password" placeholder="correct horse battery staple" bind:value="{passphrase}" />