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/Phase.php

@@ -1,5 +1,7 @@
 <?php
+
 namespace App\Models;
+
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\SoftDeletes;
 
@@ -9,28 +11,63 @@ class Phase extends Model
 
     protected $fillable = [
         'project_id', 'name', 'description', 'order', 'color', 'progress_percent',
-        'planned_start', 'planned_end', 'actual_start', 'actual_end'
+        'planned_start', 'planned_end', 'actual_start', 'actual_end',
     ];
 
     protected $casts = [
         'planned_start' => 'date',
-        'planned_end'   => 'date',
-        'actual_start'  => 'date',
-        'actual_end'    => 'date',
+        'planned_end' => 'date',
+        'actual_start' => 'date',
+        'actual_end' => 'date',
     ];
 
-    public function project()         { return $this->belongsTo(Project::class); }
-    public function layers()          { return $this->hasMany(Layer::class); }
-    public function progressUpdates() { return $this->hasMany(ProgressUpdate::class); }
-    public function currentLayer()    { return $this->hasOne(Layer::class)->latestOfMany(); }
-    public function features()        { return $this->hasManyThrough(Feature::class, Layer::class); }
-    public function media()           { return $this->morphMany(Media::class, 'mediable'); }
-    public function images()          { return $this->morphMany(Media::class, 'mediable')->where('category', 'image'); }
+    public function project()
+    {
+        return $this->belongsTo(Project::class);
+    }
+
+    public function layers()
+    {
+        return $this->hasMany(Layer::class);
+    }
+
+    public function progressUpdates()
+    {
+        return $this->hasMany(ProgressUpdate::class);
+    }
+
+    public function currentLayer()
+    {
+        return $this->hasOne(Layer::class)->latestOfMany();
+    }
+
+    public function features()
+    {
+        return $this->hasManyThrough(Feature::class, Layer::class);
+    }
+
+    public function media()
+    {
+        return $this->morphMany(Media::class, 'mediable');
+    }
+
+    public function images()
+    {
+        return $this->morphMany(Media::class, 'mediable')->where('category', 'image');
+    }
+
+    public function tasks()
+    {
+        return $this->hasMany(Task::class);
+    }
 
     public function getDeviationDaysAttribute(): ?int
     {
-        if (!$this->planned_end) return null;
+        if (! $this->planned_end) {
+            return null;
+        }
         $end = $this->actual_end ?? now();
+
         return $this->planned_end->diffInDays($end, false);
     }
 }