fix: reenviar clics en Button, usar toasts y reactividad de grupos

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

apps/web/src/lib/ui/atoms/Button.svelte

@@ -5,7 +5,7 @@
   export let disabled: boolean = false;
 </script>
 
-<button class={`btn ${variant} ${size}`} {type} {disabled}>
+<button class={`btn ${variant} ${size}`} {type} {disabled} on:click on:keydown on:focus on:blur {...$$restProps}>
   <slot />
 </button>
 

apps/web/src/lib/ui/data/FeedCard.svelte

@@ -2,7 +2,7 @@
   import Card from '$lib/ui/layout/Card.svelte';
   import Button from '$lib/ui/atoms/Button.svelte';
   import { copyToClipboard } from '$lib/utils/copy';
-  import { toasts } from '$lib/stores/toasts';
+  import { success as toastSuccess, error as toastError } from '$lib/stores/toasts';
   import { createEventDispatcher } from 'svelte';
 
   export let title: string;
@@ -15,8 +15,8 @@
   async function handleCopy() {
     if (!url) return;
     const ok = await copyToClipboard(url);
-    if (ok) toasts.success('Enlace de calendario copiado');
-    else toasts.error('No se pudo copiar el enlace');
+    if (ok) toastSuccess('Enlace de calendario copiado');
+    else toastError('No se pudo copiar el enlace');
   }
 
   function handleRotate() {

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

@@ -39,7 +39,10 @@
         aggregateUrl = body.url || null;
       } else if (type === 'group' && groupId) {
         const idx = groups.findIndex(g => g.groupId === groupId);
-        if (idx >= 0) groups[idx].url = body.url || null;
+        if (idx >= 0) {
+          groups[idx] = { ...groups[idx], url: body.url || null };
+          groups = [...groups];
+        }
       }
       success('Feed de calendario actualizado');
     } catch (e) {