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/Models/Project.php

@@ -16,8 +16,8 @@ class Project extends Model
     ];
 
     protected $casts = [
-        "start_date" => "date",
-        "end_date_estimated" => "date",
+        'start_date' => 'date',
+        'end_date_estimated' => 'date',
     ];
 
     public function changeOrders()
@@ -44,8 +44,8 @@ class Project extends Model
     public function companies()
     {
         return $this->belongsToMany(Company::class, 'company_project')
-                    ->withPivot('role_in_project')
-                    ->withTimestamps();
+            ->withPivot('role_in_project')
+            ->withTimestamps();
     }
 
     public function creator()
@@ -69,14 +69,20 @@ class Project extends Model
         return $this->morphMany(Media::class, 'mediable')->where('category', 'image');
     }
 
+    public function tasks()
+    {
+        return $this->hasMany(Task::class);
+    }
+
     // Scope to filter accessible projects for non-admin users
     public function scopeAccessibleBy($query, User $user)
     {
         if ($user->can('manage all')) {
             return $query;
         }
+
         return $query->whereHas('users', function ($q) use ($user) {
             $q->where('user_id', $user->id);
         });
     }
-}
+}