diff --git a/app/Filament/Resources/Posts/Tables/PostsTable.php b/app/Filament/Resources/Posts/Tables/PostsTable.php
index 714ad28..f8afcb7 100644
--- a/app/Filament/Resources/Posts/Tables/PostsTable.php
+++ b/app/Filament/Resources/Posts/Tables/PostsTable.php
@@ -2,6 +2,7 @@
 
 namespace App\Filament\Resources\Posts\Tables;
 
+use App\Services\NotificationService;
 use Filament\Actions\Action;
 use Filament\Actions\BulkActionGroup;
 use Filament\Actions\DeleteBulkAction;
@@ -56,7 +57,12 @@ class PostsTable
                     ->color('info')
                     ->requiresConfirmation()
                     ->visible(fn ($record) => ! $isAdmin && in_array($record->status, ['draft', 'rejected']))
-                    ->action(fn ($record) => $record->update(['status' => 'pending', 'rejection_reason' => null])),
+                    ->action(function ($record): void {
+                        $record->update(['status' => 'pending', 'rejection_reason' => null]);
+                        NotificationService::toRole('ketua', 'Artikel Menunggu Persetujuan',
+                            "\"{$record->title}\" oleh {$record->author->name} menunggu persetujuan.", 'warning',
+                            route('filament.admin.resources.posts.edit', $record));
+                    }),
 
                 // Untuk admin: approve
                 Action::make('publish')
@@ -65,11 +71,15 @@ class PostsTable
                     ->color('success')
                     ->requiresConfirmation()
                     ->visible(fn ($record) => $isAdmin && $record->status === 'pending')
-                    ->action(fn ($record) => $record->update([
+                    ->action(fn ($record) => tap($record->update([
                         'status'       => 'published',
                         'published_at' => now(),
                         'reviewed_by'  => auth()->id(),
-                    ])),
+                    ]), fn () => NotificationService::send(
+                        $record->author, 'Artikel Diterbitkan',
+                        "Artikel \"{$record->title}\" Anda telah diterbitkan.", 'success',
+                        route('filament.admin.resources.posts.edit', $record)
+                    ))),
 
                 // Untuk admin: tolak
                 Action::make('reject')
@@ -80,11 +90,15 @@ class PostsTable
                     ->form([
                         Textarea::make('rejection_reason')->label('Alasan Penolakan')->required(),
                     ])
-                    ->action(fn ($record, array $data) => $record->update([
+                    ->action(fn ($record, array $data) => tap($record->update([
                         'status'           => 'rejected',
                         'reviewed_by'      => auth()->id(),
                         'rejection_reason' => $data['rejection_reason'],
-                    ])),
+                    ]), fn () => NotificationService::send(
+                        $record->author, 'Artikel Ditolak',
+                        "Artikel \"{$record->title}\" ditolak: {$data['rejection_reason']}", 'danger',
+                        route('filament.admin.resources.posts.edit', $record)
+                    ))),
 
                 EditAction::make()
                     ->visible(fn ($record) => $isAdmin || in_array($record->status, ['draft', 'rejected'])),
diff --git a/app/Filament/Widgets/ActivityLogWidget.php b/app/Filament/Widgets/ActivityLogWidget.php
new file mode 100644
index 0000000..f9ba591
--- /dev/null
+++ b/app/Filament/Widgets/ActivityLogWidget.php
@@ -0,0 +1,39 @@
+<?php
+
+namespace App\Filament\Widgets;
+
+use App\Models\ActivityLog;
+use Filament\Tables\Columns\TextColumn;
+use Filament\Tables\Table;
+use Filament\Widgets\TableWidget as BaseWidget;
+use Illuminate\Database\Eloquent\Builder;
+
+class ActivityLogWidget extends BaseWidget
+{
+    protected static ?int $sort = 2;
+    protected int|string|array $columnSpan = 'full';
+    protected static ?string $heading = 'Aktivitas Terbaru';
+
+    public function table(Table $table): Table
+    {
+        return $table
+            ->query(ActivityLog::with('user')->latest()->limit(15))
+            ->columns([
+                TextColumn::make('created_at')->label('Waktu')
+                    ->dateTime('d M Y H:i')->sortable(),
+                TextColumn::make('user.name')->label('Oleh')->default('Sistem'),
+                TextColumn::make('action')->label('Aksi')->badge()
+                    ->color(fn ($state) => match ($state) {
+                        'created'        => 'success',
+                        'verified'       => 'info',
+                        'approved'       => 'success',
+                        'rejected'       => 'danger',
+                        'status_changed' => 'warning',
+                        'voted'          => 'info',
+                        default          => 'gray',
+                    }),
+                TextColumn::make('description')->label('Keterangan')->wrap(),
+            ])
+            ->paginated(false);
+    }
+}
diff --git a/app/Observers/ActivityObserver.php b/app/Observers/ActivityObserver.php
index 9623487..a8a3ace 100644
--- a/app/Observers/ActivityObserver.php
+++ b/app/Observers/ActivityObserver.php
@@ -4,6 +4,7 @@ namespace App\Observers;
 
 use App\Models\Activity;
 use App\Models\ActivityLog;
+use App\Services\NotificationService;
 use Illuminate\Support\Facades\Auth;
 
 class ActivityObserver
@@ -36,6 +37,22 @@ class ActivityObserver
                 'model_id'    => $activity->id,
                 'description' => "Status kegiatan '{$activity->title}' diubah dari {$old} menjadi {$new}",
             ]);
+
+            if ($new === 'pending') {
+                NotificationService::toRole('ketua', 'Kegiatan Menunggu Persetujuan',
+                    "Kegiatan \"{$activity->title}\" diajukan untuk disetujui.", 'warning',
+                    route('filament.admin.resources.activities.edit', $activity));
+            }
+
+            if (in_array($new, ['approved', 'rejected'])) {
+                NotificationService::send(
+                    $activity->creator,
+                    $new === 'approved' ? 'Kegiatan Disetujui' : 'Kegiatan Ditolak',
+                    "Kegiatan \"{$activity->title}\" telah " . ($new === 'approved' ? 'disetujui.' : 'ditolak.'),
+                    $new === 'approved' ? 'success' : 'danger',
+                    route('filament.admin.resources.activities.edit', $activity)
+                );
+            }
         }
     }
 
diff --git a/app/Observers/UserObserver.php b/app/Observers/UserObserver.php
index e38cbd4..dd54f82 100644
--- a/app/Observers/UserObserver.php
+++ b/app/Observers/UserObserver.php
@@ -5,6 +5,7 @@ namespace App\Observers;
 use App\Models\ActivityLog;
 use App\Models\MemberStatusLog;
 use App\Models\User;
+use App\Services\NotificationService;
 use Illuminate\Support\Facades\Auth;
 
 class UserObserver
@@ -28,6 +29,13 @@ class UserObserver
                 'model_id'    => $user->id,
                 'description' => "Status anggota {$user->name} diubah dari {$user->getOriginal('status')} menjadi {$user->status}",
             ]);
+
+            NotificationService::send(
+                $user,
+                'Status Keanggotaan Diubah',
+                "Status Anda diubah menjadi {$user->status}" . ($user->inactive_reason ? ": {$user->inactive_reason}" : '.'),
+                $user->status === 'aktif' ? 'success' : 'warning'
+            );
         }
     }
 
diff --git a/app/Providers/Filament/AdminPanelProvider.php b/app/Providers/Filament/AdminPanelProvider.php
index eecdbd0..2b65309 100644
--- a/app/Providers/Filament/AdminPanelProvider.php
+++ b/app/Providers/Filament/AdminPanelProvider.php
@@ -32,6 +32,7 @@ class AdminPanelProvider extends PanelProvider
             ->colors([
                 'primary' => Color::Amber,
             ])
+            ->databaseNotifications()
             ->discoverResources(in: app_path('Filament/Resources'), for: 'App\Filament\Resources')
             ->discoverPages(in: app_path('Filament/Pages'), for: 'App\Filament\Pages')
             ->pages([
@@ -41,6 +42,7 @@ class AdminPanelProvider extends PanelProvider
             ->widgets([
                 AccountWidget::class,
                 \App\Filament\Widgets\StatsOverview::class,
+                \App\Filament\Widgets\ActivityLogWidget::class,
             ])
             ->middleware([
                 EncryptCookies::class,
diff --git a/app/Services/NotificationService.php b/app/Services/NotificationService.php
new file mode 100644
index 0000000..64f814d
--- /dev/null
+++ b/app/Services/NotificationService.php
@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Services;
+
+use App\Models\User;
+use Filament\Notifications\Notification;
+
+class NotificationService
+{
+    public static function send(User|iterable $recipients, string $title, string $body, string $color = 'info', ?string $url = null): void
+    {
+        $notification = Notification::make()
+            ->title($title)
+            ->body($body)
+            ->color($color);
+
+        if ($url) {
+            $notification->actions([
+                \Filament\Notifications\Actions\Action::make('lihat')
+                    ->label('Lihat')
+                    ->url($url),
+            ]);
+        }
+
+        $notification->sendToDatabase(
+            $recipients instanceof User ? collect([$recipients]) : collect($recipients)
+        );
+    }
+
+    public static function toRole(string $role, string $title, string $body, string $color = 'info', ?string $url = null): void
+    {
+        $users = User::role($role)->get();
+        if ($users->isEmpty()) return;
+        self::send($users, $title, $body, $color, $url);
+    }
+}
diff --git a/database/migrations/2026_04_03_004642_create_notifications_table.php b/database/migrations/2026_04_03_004642_create_notifications_table.php
new file mode 100644
index 0000000..d738032
--- /dev/null
+++ b/database/migrations/2026_04_03_004642_create_notifications_table.php
@@ -0,0 +1,31 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('notifications', function (Blueprint $table) {
+            $table->uuid('id')->primary();
+            $table->string('type');
+            $table->morphs('notifiable');
+            $table->text('data');
+            $table->timestamp('read_at')->nullable();
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('notifications');
+    }
+};