feat: notificaciones en tiempo real para social (likes, comentarios, solicitudes)

- Notifier helper: guarda en BD + broadcast en un solo llamado
- AppNotification: notificación genérica para canal database
- FriendshipController: notifica al recibir solicitud y al aceptarla
- PostController: notifica al autor cuando le dan like o comentan (excepto en propio post)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Http/Controllers/FriendshipController.php

@@ -4,12 +4,11 @@ namespace App\Http\Controllers;
 
 use App\Models\Friendship;
 use App\Models\User;
-use App\Notifications\FriendRequestNotification;
+use App\Support\Notifier;
 use Illuminate\Http\Request;
 
 class FriendshipController extends Controller
 {
-    // Solicitudes pendientes recibidas
     public function index()
     {
         $requests = auth()->user()
@@ -22,7 +21,6 @@ class FriendshipController extends Controller
         return view('friendships.index', compact('requests'));
     }
 
-    // Enviar solicitud
     public function send(User $user)
     {
         $me = auth()->user();
@@ -31,33 +29,45 @@ class FriendshipController extends Controller
             return back()->with('error', 'No puedes enviarte una solicitud a ti mismo.');
         }
 
-        $existing = $me->friendshipWith($user);
-        if ($existing) {
+        if ($me->friendshipWith($user)) {
             return back()->with('error', 'Ya existe una relación con este usuario.');
         }
 
-        $friendship = Friendship::create([
+        Friendship::create([
             'sender_id'   => $me->id,
             'receiver_id' => $user->id,
             'status'      => 'pending',
         ]);
 
-        $user->notify(new FriendRequestNotification($me));
+        Notifier::send(
+            recipient: $user,
+            title:     $me->name . ' te envió una solicitud de amistad',
+            icon:      'fa-user-plus',
+            color:     'primary',
+            url:       route('friendships.index'),
+        );
 
         return back()->with('success', 'Solicitud de amistad enviada.');
     }
 
-    // Aceptar solicitud
     public function accept(Friendship $friendship)
     {
         abort_unless($friendship->receiver_id === auth()->id(), 403);
 
         $friendship->update(['status' => 'accepted']);
+        $friendship->load('receiver');
+
+        Notifier::send(
+            recipient: $friendship->sender,
+            title:     $friendship->receiver->name . ' aceptó tu solicitud de amistad',
+            icon:      'fa-user-check',
+            color:     'success',
+            url:       route('social.profile', $friendship->receiver),
+        );
 
         return back()->with('success', 'Solicitud aceptada.');
     }
 
-    // Rechazar o cancelar solicitud
     public function destroy(Friendship $friendship)
     {
         $me = auth()->id();
@@ -71,7 +81,7 @@ class FriendshipController extends Controller
         return back()->with('success', 'Solicitud eliminada.');
     }
 
-    // AJAX: enviar/cancelar solicitud desde búsqueda o perfil
+    // AJAX desde búsqueda/perfil
     public function toggle(User $user)
     {
         $me = auth()->user();
@@ -93,7 +103,13 @@ class FriendshipController extends Controller
             'status'      => 'pending',
         ]);
 
-        $user->notify(new FriendRequestNotification($me));
+        Notifier::send(
+            recipient: $user,
+            title:     $me->name . ' te envió una solicitud de amistad',
+            icon:      'fa-user-plus',
+            color:     'primary',
+            url:       route('friendships.index'),
+        );
 
         return response()->json(['status' => 'pending']);
     }

app/Http/Controllers/PostController.php

@@ -5,6 +5,7 @@ namespace App\Http\Controllers;
 use App\Models\Post;
 use App\Models\PostComment;
 use App\Models\PostLike;
+use App\Support\Notifier;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Storage;
 
@@ -12,9 +13,9 @@ class PostController extends Controller
 {
     public function index()
     {
-        $me      = auth()->user();
+        $me        = auth()->user();
         $friendIds = $me->friendIds();
-        $ids     = array_merge($friendIds, [$me->id]);
+        $ids       = array_merge($friendIds, [$me->id]);
 
         $posts = Post::whereIn('user_id', $ids)
             ->with(['author', 'likes', 'comments.author'])
@@ -51,15 +52,28 @@ class PostController extends Controller
 
     public function like(Post $post)
     {
-        $userId = auth()->id();
-        $liked  = PostLike::where('user_id', $userId)->where('post_id', $post->id)->first();
+        $me    = auth()->user();
+        $liked = PostLike::where('user_id', $me->id)->where('post_id', $post->id)->first();
 
         if ($liked) {
             $liked->delete();
             $liked = false;
         } else {
-            PostLike::create(['user_id' => $userId, 'post_id' => $post->id]);
+            PostLike::create(['user_id' => $me->id, 'post_id' => $post->id]);
             $liked = true;
+
+            // Notify post author (not if liking own post)
+            if ($post->user_id !== $me->id) {
+                $post->load('author');
+                Notifier::send(
+                    recipient: $post->author,
+                    title:     $me->name . ' le dio Me gusta a tu publicación',
+                    body:      $post->body ? \Str::limit($post->body, 60) : '',
+                    icon:      'fa-heart',
+                    color:     'danger',
+                    url:       route('feed') . '#post-' . $post->id,
+                );
+            }
         }
 
         return response()->json([
@@ -72,14 +86,28 @@ class PostController extends Controller
     {
         $request->validate(['body' => 'required|string|max:500']);
 
+        $me      = auth()->user();
         $comment = PostComment::create([
-            'user_id' => auth()->id(),
+            'user_id' => $me->id,
             'post_id' => $post->id,
             'body'    => $request->body,
         ]);
 
         $comment->load('author');
 
+        // Notify post author (not if commenting on own post)
+        if ($post->user_id !== $me->id) {
+            $post->load('author');
+            Notifier::send(
+                recipient: $post->author,
+                title:     $me->name . ' comentó en tu publicación',
+                body:      \Str::limit($request->body, 60),
+                icon:      'fa-comment',
+                color:     'info',
+                url:       route('feed') . '#post-' . $post->id,
+            );
+        }
+
         return response()->json([
             'id'         => $comment->id,
             'body'       => $comment->body,