feat: tambah budget kegiatan dengan alur threshold approval/voting

app/Observers/ActivityObserver.php

@@ -4,6 +4,8 @@ namespace App\Observers;
 
 use App\Models\Activity;
 use App\Models\ActivityLog;
+use App\Models\Approval;
+use App\Models\Vote;
 use App\Services\NotificationService;
 use Filament\Notifications\Notification;
 use Illuminate\Support\Facades\Auth;
@@ -42,6 +44,27 @@ class ActivityObserver
                 NotificationService::toRole('ketua', 'Kegiatan Menunggu Persetujuan',
                     "Kegiatan \"{$activity->title}\" diajukan untuk disetujui.", 'warning',
                     route('filament.admin.resources.activities.edit', $activity));
+
+                // Threshold budget
+                $budget = $activity->budget;
+                if ($budget >= 500_000 && $budget <= 2_000_000) {
+                    Approval::create([
+                        'model_type'         => Activity::class,
+                        'model_id'           => $activity->id,
+                        'required_approvals' => 1,
+                        'status'             => 'pending',
+                    ]);
+                } elseif ($budget > 2_000_000) {
+                    Vote::create([
+                        'title'       => "Persetujuan Budget Kegiatan: {$activity->title}",
+                        'description' => "Budget kegiatan senilai Rp " . number_format($budget, 0, ',', '.') . " memerlukan persetujuan voting.",
+                        'type'        => 'finance',
+                        'related_id'  => $activity->id,
+                        'status'      => 'open',
+                        'deadline'    => now()->addDays(3),
+                        'created_by'  => Auth::id() ?? $activity->created_by,
+                    ]);
+                }
             }
 
             if (in_array($new, ['approved', 'rejected']) && $activity->creator) {