feat: cambia pestaña a Calendarios, persiste colapsado por usuario

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

apps/web/src/lib/ui/layout/AppShell.svelte

@@ -6,7 +6,7 @@
     pathname === '/app' ? 'Tareas' :
     pathname.startsWith('/app/groups') ? 'Grupos' :
     pathname.startsWith('/app/preferences') ? 'Recordatorios' :
-    pathname.startsWith('/app/integrations') ? 'Integraciones' :
+    pathname.startsWith('/app/integrations') ? 'Calendarios' :
     'Tareas';
 </script>
 
@@ -17,7 +17,7 @@
       <a href="/app" class:active={$page.url.pathname === '/app'}>Tareas</a>
       <a href="/app/groups" class:active={$page.url.pathname.startsWith('/app/groups')}>Grupos</a>
       <a href="/app/preferences" class:active={$page.url.pathname.startsWith('/app/preferences')}>Recordatorios</a>
-      <a href="/app/integrations" class:active={$page.url.pathname.startsWith('/app/integrations')}>Integraciones</a>
+      <a href="/app/integrations" class="calendar" class:active={$page.url.pathname.startsWith('/app/integrations')}>Calendarios</a>
     </nav>
     <form method="POST" action="/api/logout">
       <button type="submit" class="logout">Cerrar sesión</button>
@@ -51,9 +51,9 @@
     <span class="icon">⏰</span>
     <span class="label">Recordatorios</span>
   </a>
-  <a href="/app/integrations" class:active={$page.url.pathname.startsWith('/app/integrations')} aria-label="Integraciones">
+  <a href="/app/integrations" class="calendar" class:active={$page.url.pathname.startsWith('/app/integrations')} aria-label="Calendarios">
     <span class="icon">📅</span>
-    <span class="label">Integraciones</span>
+    <span class="label">Calendarios</span>
   </a>
   <form method="POST" action="/api/logout" class="logout-tab" aria-label="Salir">
     <button type="submit">
@@ -188,6 +188,13 @@
       color: var(--color-primary);
       font-weight: 600;
     }
+    /* Atenuar la pestaña de Calendarios cuando está inactiva */
+    .tabbar a.calendar {
+      opacity: 0.8;
+    }
+    .tabbar a.calendar.active {
+      opacity: 1;
+    }
     .tabbar .icon {
       font-size: 18px;
       line-height: 1;

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

@@ -86,7 +86,7 @@
 
 <h2 class="section-title">Mis tareas (abiertas)</h2>
 {#if data.openTasks.length === 0}
-	<p>No tienes tareas abiertas.</p>
+	<p>No tienes tareas asignadas. Crea o reclama una para empezar.</p>
 {:else}
 	<Card>
 		<ul class="list">
@@ -106,7 +106,7 @@
 
 <h2 class="section-title">Sin responsable de mis grupos</h2>
 {#if data.unassignedOpen.length === 0}
-	<p>No hay tareas sin responsable en tus grupos.</p>
+	<p>No hay tareas sin responsable en tus grupos. Crea una nueva o invita a tus compañeros.</p>
 {:else}
 	{#if data.order === 'group'}
 		{#each groupByGroup(data.unassignedOpen) as g}

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

@@ -1,6 +1,7 @@
 <script lang="ts">
   import TaskItem from '$lib/ui/data/TaskItem.svelte';
   import Card from '$lib/ui/layout/Card.svelte';
+  import { onMount } from 'svelte';
 
   type GroupItem = {
     id: string;
@@ -25,6 +26,64 @@
     if (params.unassignedFirst) sp.set('unassignedFirst', 'true');
     return sp.toString();
   }
+
+  const storageKey = `groupsCollapsed:v1:${data.userId ?? 'anon'}`;
+  let collapsed: Record<string, boolean> = {};
+
+  function hasTasks(groupId: string): boolean {
+    const arr = itemsByGroup[groupId] || [];
+    return Array.isArray(arr) && arr.length > 0;
+  }
+
+  function defaultCollapsedFor(groupId: string): boolean {
+    // Por defecto, colapsado si no tiene tareas abiertas
+    return !hasTasks(groupId);
+  }
+
+  function isOpen(groupId: string): boolean {
+    const v = collapsed[groupId];
+    if (typeof v === 'boolean') return !v;
+    return !defaultCollapsedFor(groupId);
+  }
+
+  function saveCollapsed() {
+    try {
+      const currentIds = new Set(groups.map(g => g.id));
+      const pruned: Record<string, boolean> = {};
+      for (const id of Object.keys(collapsed)) {
+        if (currentIds.has(id)) pruned[id] = !!collapsed[id];
+      }
+      localStorage.setItem(storageKey, JSON.stringify(pruned));
+    } catch {}
+  }
+
+  function handleToggle(groupId: string, e: Event) {
+    const open = (e.currentTarget as HTMLDetailsElement).open;
+    collapsed = { ...collapsed, [groupId]: !open };
+    saveCollapsed();
+  }
+
+  onMount(() => {
+    try {
+      const raw = localStorage.getItem(storageKey);
+      const saved = raw ? JSON.parse(raw) : {};
+      const map: Record<string, boolean> = {};
+      const currentIds = new Set(groups.map(g => g.id));
+      for (const g of groups) {
+        map[g.id] = typeof saved?.[g.id] === 'boolean' ? !!saved[g.id] : defaultCollapsedFor(g.id);
+      }
+      // Limpieza de claves obsoletas en storage
+      const cleaned: Record<string, boolean> = {};
+      for (const k of Object.keys(saved || {})) {
+        if (currentIds.has(k)) cleaned[k] = !!saved[k];
+      }
+      collapsed = map;
+      localStorage.setItem(storageKey, JSON.stringify(cleaned || map));
+    } catch {
+      // si falla, dejamos los defaults (basados en tareas)
+      collapsed = {};
+    }
+  });
 </script>
 
 <svelte:head>
@@ -53,7 +112,7 @@
   </div>
 
   {#each groups as g}
-    <details open class="group">
+    <details class="group" open={isOpen(g.id)} on:toggle={(e) => handleToggle(g.id, e)}>
       <summary class="group-header">
         <span class="name">{g.name ?? g.id}</span>
         <span class="counts">