wirking on global error display

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

frontend/src/Components/Login.svelte

@@ -2,22 +2,21 @@
     import { onMount }       from 'svelte';
     import { useTinyRouter } from 'svelte-tiny-router';
 
-    import { api }                 from '../urls.svelte.js';
-    import { checkUser, tryLogin } from '../user.svelte.js';
-    import { t }                   from '../translations.svelte.js';
+    import { api }                 from '../urls.svelte';
+    import { error, yikes }        from '../warn.svelte';
+    import { checkUser, tryLogin } from '../user.svelte';
+    import { t }                   from '../translations.svelte';
 
     let credentials = $state({ username : null, password : null });
     const router    = useTinyRouter();
     let services    = $state([]);
-    let error       = $state(null);
-
 
     async function doLogin(ev){
         ev.preventDefault();
         const json = await tryLogin(credentials);
         if (json) {
             json.release_time = json.release_time.replace('T',' ');
-            error = t('failed_login_attempts',json);
+            error(t('failed_login_attempts',json));
         }
     }
 
@@ -43,13 +42,14 @@
         const resp = await fetch(url,{credentials:'include'});
         if (resp.ok){
             const json = await resp.json();
+            yikes();
             if (json.authorization_endpoint) {
                 const endpoint = json.authorization_endpoint;
                 delete json.authorization_endpoint;
                 location.href = endpoint + '?' + new URLSearchParams(json);
             }
         } else {
-            error = await resp.text();
+            error(await resp.text());
             if (btn) btn.disabled = false;
         }
     }
@@ -85,9 +85,6 @@
 
 <form onsubmit={doLogin}>
     <fieldset>
-        {#if error}
-        <span class="error">{error}</span>
-        {/if}
         <legend>{t('login')}</legend>
         <label>
             <input type="text" bind:value={credentials.username} required use:init />

frontend/src/Components/UserSelector.svelte

@@ -5,7 +5,6 @@
 
     import Autocomplete       from './Autocomplete.svelte';
 
-    let error = $state(null);
     let {
         getCandidates = async text => {},
         heading       = t('add_object',{object:t('user')}),
@@ -25,9 +24,6 @@
     let sortedUsers = $derived.by(() => Object.values(users).sort((a, b) => a.name.localeCompare(b.name)));
 </script>
 
-{#if error}
-<span class="error">{error}</span>
-{/if}
 <table>
     <tbody>
     {#each sortedUsers as usr,idx}