feat(issues): notificaciones, plantillas de checklist, alertas de vencimiento y reporte desde el mapa

- Notificaciones (DB): asignación de incidencia (IssueAssigned), asignación de tarea
  (IssueTaskAssigned), comentario (IssueCommented) y cambio de estado
  (IssueStatusChanged) a reporter+asignado excluyendo al actor.
- Plantillas de checklist: tabla issue_checklist_templates + modelo, gestor CRUD
  (IssueChecklistManager, ruta projects.issues.checklists) y "Aplicar plantilla" en
  el detalle (alta masiva de tareas).
- Alertas de vencimiento: columna overdue_notified_at + scope overdue, comando
  issues:notify-overdue (programado a diario) que avisa al asignado una sola vez;
  badge "vencidas" en la tabla y resaltado por tarea en el detalle.
- Reporte desde el mapa: botón "Incidencia" en el panel del feature seleccionado →
  formulario con feature pre-vinculado (IssueForm lee ?feature=).

Tests: IssuesEnhancementsTest (7). Suite 57 passing (solo 2 pre-existentes sqlite).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/Livewire/IssueDetail.php

@@ -3,9 +3,13 @@
 namespace App\Livewire;
 
 use App\Models\Issue;
+use App\Models\IssueChecklistTemplate;
 use App\Models\IssueComment;
 use App\Models\IssueTask;
 use App\Models\Project;
+use App\Notifications\IssueCommentedNotification;
+use App\Notifications\IssueStatusChangedNotification;
+use App\Notifications\IssueTaskAssignedNotification;
 use Illuminate\Support\Facades\Auth;
 use Illuminate\Validation\ValidationException;
 use Livewire\Attributes\Layout;
@@ -25,6 +29,10 @@ class IssueDetail extends Component
     public $newTaskAssignee = '';
     public $newTaskDue = '';
 
+    // Checklist templates
+    public $checklistTemplates = [];
+    public $applyTemplateId = '';
+
     // New comment form
     public string $newComment = '';
     public $commentPhoto = null;       // single optional photo on a comment
@@ -46,6 +54,7 @@ class IssueDetail extends Component
 
         $this->resolutionNotes = $issue->resolution_notes ?? '';
         $this->projectUsers = $project->users()->orderBy('name')->get();
+        $this->checklistTemplates = IssueChecklistTemplate::where('project_id', $project->id)->orderBy('name')->get();
         $this->refreshIssue();
     }
 
@@ -61,6 +70,17 @@ class IssueDetail extends Component
         return Auth::user()->can('edit issues');
     }
 
+    /** Notify the issue's stakeholders (reporter + assignee), excluding the current actor. */
+    private function notifyStakeholders($notification): void
+    {
+        $this->issue->loadMissing(['reporter', 'assignee']);
+        collect([$this->issue->reporter, $this->issue->assignee])
+            ->filter()
+            ->unique('id')
+            ->reject(fn ($u) => $u->id === Auth::id())
+            ->each(fn ($u) => $u->notify($notification));
+    }
+
     public function refreshIssue(): void
     {
         $this->issue->load([
@@ -82,7 +102,7 @@ class IssueDetail extends Component
             'newTaskDue'      => 'nullable|date',
         ]);
 
-        $this->issue->tasks()->create([
+        $task = $this->issue->tasks()->create([
             'title'       => $this->newTaskTitle,
             'assigned_to' => $this->newTaskAssignee ?: null,
             'due_date'    => $this->newTaskDue ?: null,
@@ -90,11 +110,39 @@ class IssueDetail extends Component
             'uuid'        => (string) \Illuminate\Support\Str::uuid(),
         ]);
 
+        // Notify the assignee (unless they assigned it to themselves).
+        if ($task->assigned_to && $task->assigned_to !== Auth::id()) {
+            $task->loadMissing('issue');
+            $task->assignee?->notify(new IssueTaskAssignedNotification($task));
+        }
+
         $this->reset(['newTaskTitle', 'newTaskAssignee', 'newTaskDue']);
         $this->refreshIssue();
         $this->dispatch('notify', 'Tarea añadida');
     }
 
+    public function applyTemplate(): void
+    {
+        abort_unless($this->canEdit(), 403);
+        $this->validate(['applyTemplateId' => 'required|exists:issue_checklist_templates,id']);
+
+        $template = IssueChecklistTemplate::where('project_id', $this->project->id)
+            ->findOrFail($this->applyTemplateId);
+
+        $order = (int) $this->issue->tasks()->max('order');
+        foreach ($template->items ?: [] as $title) {
+            $this->issue->tasks()->create([
+                'title' => $title,
+                'order' => ++$order,
+                'uuid'  => (string) \Illuminate\Support\Str::uuid(),
+            ]);
+        }
+
+        $this->applyTemplateId = '';
+        $this->refreshIssue();
+        $this->dispatch('notify', 'Plantilla aplicada');
+    }
+
     public function toggleTask($taskId): void
     {
         abort_unless($this->canEdit(), 403);
@@ -143,6 +191,9 @@ class IssueDetail extends Component
             $this->storeUpload($this->commentPhoto, $comment, 'comment');
         }
 
+        $comment->setRelation('issue', $this->issue)->setRelation('user', Auth::user());
+        $this->notifyStakeholders(new IssueCommentedNotification($comment));
+
         $this->reset(['newComment', 'commentPhoto']);
         $this->refreshIssue();
         $this->dispatch('notify', 'Comentario añadido');
@@ -196,6 +247,7 @@ class IssueDetail extends Component
     {
         abort_unless($this->canEdit(), 403);
         $this->issue->update(['status' => 'in_review']);
+        $this->notifyStakeholders(new IssueStatusChangedNotification($this->issue, 'in_review'));
         $this->refreshIssue();
         $this->dispatch('notify', 'Incidencia enviada a revisión');
     }
@@ -208,6 +260,7 @@ class IssueDetail extends Component
             'resolved_at'      => $this->issue->resolved_at ?? now(),
             'resolution_notes' => $this->resolutionNotes ?: null,
         ]);
+        $this->notifyStakeholders(new IssueStatusChangedNotification($this->issue, 'resolved'));
         $this->refreshIssue();
         $this->dispatch('notify', 'Incidencia validada y resuelta');
     }
@@ -219,6 +272,7 @@ class IssueDetail extends Component
             'status'      => 'closed',
             'resolved_at' => $this->issue->resolved_at ?? now(),
         ]);
+        $this->notifyStakeholders(new IssueStatusChangedNotification($this->issue, 'closed'));
         $this->refreshIssue();
         $this->dispatch('notify', 'Incidencia cerrada');
     }
@@ -227,6 +281,7 @@ class IssueDetail extends Component
     {
         abort_unless($this->canEdit(), 403);
         $this->issue->update(['status' => 'open', 'resolved_at' => null]);
+        $this->notifyStakeholders(new IssueStatusChangedNotification($this->issue, 'open'));
         $this->refreshIssue();
         $this->dispatch('notify', 'Incidencia reabierta');
     }