fix: eliminar import de fade y usar solo slide en +page.svelte

Co-authored-by: aider (openrouter/openai/gpt-5) <aider@aider.chat>

apps/web/src/routes/app/groups/+page.svelte

@@ -2,7 +2,7 @@
   import TaskItem from "$lib/ui/data/TaskItem.svelte";
   import Card from "$lib/ui/layout/Card.svelte";
   import { onMount } from "svelte";
-  import { slide, fade } from "svelte/transition";
+  import { slide } from "svelte/transition";
 
   type GroupItem = {
     id: string;
@@ -164,7 +164,7 @@
         </span>
       </summary>
       {#if isOpen(g.id)}
-        <div in:slide={{ duration: 180 }} out:slide={{ duration: 180 }} in:fade={{ duration: 120 }} out:fade={{ duration: 120 }}>
+        <div in:slide={{ duration: 180 }} out:slide={{ duration: 180 }}>
           <Card>
             <ul class="list">
               {#each itemsByGroup[g.id] || [] as t (t.id)}