feat(tasks): complete task management system with Kanban, Calendar, notifications

- Add Task model with subtasks, priorities, status transitions, dates, hours
- Add Comment polymorphic model for tasks/issues/projects
- Livewire components: TaskManager (list+filters), TaskForm (modal), TaskDetail, TaskKanban (drag&drop), TaskCalendar (FullCalendar)
- TaskPolicy with permissions (view/create/edit/delete/assign/manage all)
- Notifications: assigned, status change, overdue, comment added
- Daily overdue notification job scheduled
- Dashboard widget unifies IssueTask + Task
- i18n: en/es/fr/ru (393 keys each)
- Routes, navigation, offline sync support
- 101 tests passing, Pint compliant on new files

app/Livewire/Common/LanguageSwitcher.php

@@ -11,14 +11,22 @@ class LanguageSwitcher extends Component
 {
     public string $currentLocale;
 
+    /** Idiomas disponibles con nombre y bandera. */
+    public array $languages = [
+        'en' => ['name' => 'English', 'flag' => 'gb.svg'],
+        'es' => ['name' => 'Español', 'flag' => 'es.svg'],
+        'fr' => ['name' => 'Français', 'flag' => 'fr.svg'],
+        'ru' => ['name' => 'Русский', 'flag' => 'ru.svg'],
+    ];
+
     public function mount(): void
     {
         $this->currentLocale = App::getLocale();
     }
 
-    public function switchLanguage(string $locale): void
+    public function updatedCurrentLocale(string $locale): void
     {
-        if (!in_array($locale, ['en', 'es'])) {
+        if (!in_array($locale, ['en', 'es', 'fr', 'ru'])) {
             return;
         }
 
@@ -31,11 +39,14 @@ class LanguageSwitcher extends Component
         }
 
         // Dispatch a browser event — JavaScript reloads the page.
-        // PHP-side redirects break because $this->redirect() runs inside
-        // /livewire/update (the AJAX endpoint), not on the real page URL.
         $this->dispatch('locale-changed');
     }
 
+    public function switchLanguage(string $locale): void
+    {
+        $this->updatedCurrentLocale($locale);
+    }
+
     public function render()
     {
         return view('livewire.common.language-switcher');