refactored more error code

frontend/src/routes/project/Kanban.svelte

@@ -3,6 +3,7 @@
     import { useTinyRouter } from 'svelte-tiny-router';
 
     import { api }           from '../../urls.svelte.js';
+    import { error, yikes }  from '../../warn.svelte';
     import { t }             from '../../translations.svelte.js';
     import { user }          from '../../user.svelte.js';
 
@@ -14,7 +15,6 @@
     let router       = useTinyRouter();
     if (router.hasQueryParam('filter')) filter_input = router.getQueryParam('filter');
     let dragged      = null;
-    let error        = $state(null);
     let highlight    = $state({});
     let filter       = $derived(filter_input.toLowerCase());
     let project      = $state(null);
@@ -53,9 +53,9 @@
             if (!tasks[user_id]) tasks[user_id] = {};
             if (!tasks[user_id][state]) tasks[user_id][state] = {};
             tasks[user_id][state][task.id] = task;
-            error = null;
+            yikes();
         } else {
-            error = await resp.text();
+            error(resp);
         }
     }
 
@@ -81,9 +81,9 @@
             tasks[user_id][state][task.id] = task;
             task.assignee = user_id;
             task.status   = state;
-            error         = null;
+            yikes();
         } else {
-            error = await resp.text();
+            error(resp);
         }
     }
 
@@ -104,9 +104,9 @@
                 users[uid] = member.user.name;
                 if (!tasks[uid]) tasks[uid] = {};
             }
-            error = null;
+            yikes();
         } else {
-            error = await resp.text();
+            error(resp);
         }
     }
 
@@ -140,7 +140,7 @@
                 tasks[assignee][state][task_id] = task;
             }
         } else {
-            error = await resp.text();
+            error(resp);
         }
     }
 
@@ -164,9 +164,6 @@
 {#if project}
 <h1 onclick={ev => router.navigate(`/project/${project.id}/view`)}>{project.name}</h1>
 {/if}
-{#if error}
-<span class="error">{error}</span>
-{/if}
 
 {#if project}
 <div class="kanban" style="display: grid; grid-template-columns: {`repeat(${columns}, auto)`}">