feat: RFQ portal, notifications, and project settings updates

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

app/Notifications/QuoteReceived.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Notifications;
+
+use App\Models\RfqInvitation;
+use Illuminate\Bus\Queueable;
+use Illuminate\Notifications\Notification;
+
+class QuoteReceived extends Notification
+{
+    use Queueable;
+
+    public function __construct(public RfqInvitation $invitation) {}
+
+    public function via(object $notifiable): array
+    {
+        return ['database'];
+    }
+
+    public function toDatabase(object $notifiable): array
+    {
+        $pr = $this->invitation->purchaseRequest;
+        return [
+            'type'             => 'quote_received',
+            'message'          => $this->invitation->supplier->name . ' submitted a quote for ' . $pr->request_number,
+            'supplier_name'    => $this->invitation->supplier->name,
+            'request_number'   => $pr->request_number,
+            'purchase_request_id' => $pr->id,
+            'url'              => route('purchase.pipeline.show', $pr),
+        ];
+    }
+}