feat:實作通知系統 — 站內通知、Email 通知、Polling 機制

後端
- 新增 6 個 Notification class（預約建立/確認/拒絕/取消/完成、收到評價），database + mail 雙 channel
- 新增 NotificationController（list / unread-count / markRead / markAllRead / destroy）
- 整合通知觸發至 MemberBookingController、ProviderBookingController、CompleteFinishedBookings、ReviewController
- 新增 notifications / jobs / failed_jobs migration
- Docker Compose 加入 queue-worker、mailpit service
- DivingOffer 補上 provider() 關聯

前端
- 新增 notificationStore（Polling 30s/60s 自適應 + Page Visibility API）
- 新增 NotificationBell（未讀 Badge）、NotificationDrawer（側邊通知中心）
- main.js：auth store init 前置於 router.use()，修正 beforeEach guard 時序問題
- notificationAxios：依路徑動態選擇 member/coach token
- NotificationDrawer：改用 new URL().pathname 提取 action_url 路徑

OpenSpec
- 歸檔 notification-system change
- 同步 notification-core / notification-email / notification-triggers specs 至主規格
- 更新 booking-lifecycle / review-lifecycle spec（補充通知觸發 requirement）

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

app/Console/Commands/CompleteFinishedBookings.php

@@ -4,6 +4,7 @@ namespace App\Console\Commands;
 
 use App\Enums\BookingStatus;
 use App\Models\Booking;
+use App\Notifications\BookingCompletedNotification;
 use Illuminate\Console\Command;
 use Illuminate\Support\Facades\Log;
 
@@ -14,9 +15,22 @@ class CompleteFinishedBookings extends Command
 
     public function handle(): void
     {
-        $count = Booking::where('status', BookingStatus::Confirmed->value)
+        $bookings = Booking::with(['member', 'schedule.divingOffer'])
+            ->where('status', BookingStatus::Confirmed->value)
             ->whereHas('schedule', fn($q) => $q->whereDate('scheduled_date', '<', now()->toDateString()))
-            ->update(['status' => BookingStatus::Completed->value]);
+            ->get();
+
+        $count = 0;
+        foreach ($bookings as $booking) {
+            $booking->update(['status' => BookingStatus::Completed]);
+            $count++;
+
+            try {
+                $booking->member->notify(new BookingCompletedNotification($booking));
+            } catch (\Throwable $e) {
+                Log::error("BookingCompletedNotification failed for booking #{$booking->id}: " . $e->getMessage());
+            }
+        }
 
         Log::info("CompleteFinishedBookings: {$count} completed");
         $this->info("CompleteFinishedBookings: {$count} bookings completed.");