feat(verification): 教練審核流程完整版——狀態機/證照送審/Admin 裁決/通知

實作 openspec change provider-verification-workflow（25/25 tasks）：
- is_verified 升級為 verification_status 四狀態機（unsubmitted/pending/
  approved/rejected），migration 自動轉換既有資料，API 以 accessor 保留
  is_verified 相容輸出
- 教練端：證照上傳（≤3 張、複用 CompressesImages）、送審、駁回原因
  顯示與重送（/coach/verification 新頁面）
- Admin 端：審核佇列、通過/駁回（原因必填）、撤銷 approved；移除
  toggle-verified 端點（防繞過狀態機）；裁決後 flush 課程快取
- 通知：審核通過/駁回（站內+Email，駁回含原因）
- 可見性與預約入口改判 approved（行為等價）
- 測試 +18（ProviderVerificationTest 10、AdminVerificationTest 8），
  既有 4 個測試檔 helper 遷移；Swagger 同步
- 規格同步：provider-verification 全面改寫、admin-user-management
  toggle 段落改為移除聲明

容器內全套件 173 passed / 439 assertions。

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

app/Http/Controllers/API/AdminUserController.php

@@ -5,7 +5,6 @@ namespace App\Http\Controllers\API;
 use App\Http\Controllers\Controller;
 use App\Models\User;
 use Illuminate\Http\Request;
-use Illuminate\Support\Facades\Cache;
 
 class AdminUserController extends Controller
 {
@@ -132,23 +131,5 @@ class AdminUserController extends Controller
         return response()->json(['status' => true, 'message' => $msg, 'data' => ['is_active' => $user->is_active]]);
     }
 
-    public function toggleProviderVerified(int $id)
-    {
-        if ($err = $this->checkAdmin()) return $err;
-
-        $user = $this->findUser($id, 'provider');
-        if (!$user) {
-            return response()->json(['status' => false, 'message' => '用戶不存在'], 404);
-        }
-
-        $profile = $user->providerProfile;
-        $profile->is_verified = !$profile->is_verified;
-        $profile->save();
-
-        // 驗證狀態影響公開課程列表的可見性，需立即讓快取失效
-        Cache::tags(['diving_offers'])->flush();
-
-        $msg = $profile->is_verified ? '教練已驗證' : '已取消驗證';
-        return response()->json(['status' => true, 'message' => $msg, 'data' => ['is_verified' => $profile->is_verified]]);
-    }
+    // toggleProviderVerified 已移除：驗證狀態變更一律走 AdminVerificationController 的審核狀態機
 }

app/Http/Controllers/API/AdminVerificationController.php

@@ -0,0 +1,94 @@
+<?php
+
+namespace App\Http\Controllers\API;
+
+use App\Enums\VerificationStatus;
+use App\Http\Controllers\Controller;
+use App\Models\User;
+use App\Notifications\ProviderVerificationApprovedNotification;
+use App\Notifications\ProviderVerificationRejectedNotification;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Cache;
+use Illuminate\Support\Facades\Log;
+
+class AdminVerificationController extends Controller
+{
+    public function index(Request $request)
+    {
+        $status = $request->query('status', VerificationStatus::Pending->value);
+
+        $query = User::where('role', 'provider')
+            ->with(['providerProfile', 'providerCertifications'])
+            ->whereHas('providerProfile');
+
+        if ($status !== 'all') {
+            $query->whereHas('providerProfile', fn($q) => $q->where('verification_status', $status));
+        }
+
+        $providers = $query->orderByDesc('updated_at')->get()->map(fn($u) => [
+            'user_id'             => $u->id,
+            'name'                => $u->name,
+            'email'               => $u->email,
+            'business_name'       => $u->providerProfile->business_name,
+            'verification_status' => $u->providerProfile->verification_status->value,
+            'rejection_reason'    => $u->providerProfile->rejection_reason,
+            'certifications'      => $u->providerCertifications->map(fn($c) => ['id' => $c->id, 'url' => $c->url])->values(),
+        ]);
+
+        return response()->json(['status' => true, 'data' => $providers]);
+    }
+
+    public function approve(Request $request, int $userId)
+    {
+        $profile = $this->findProviderProfile($userId);
+
+        if (!$profile->verification_status->canTransitionTo(VerificationStatus::Approved)) {
+            return response()->json(['status' => false, 'message' => '當前狀態無法通過審核'], 422);
+        }
+
+        $profile->update(['verification_status' => VerificationStatus::Approved, 'rejection_reason' => null]);
+
+        // 驗證狀態影響公開課程可見性，需立即讓快取失效
+        Cache::tags(['diving_offers'])->flush();
+
+        $this->notify($profile->user, new ProviderVerificationApprovedNotification());
+
+        return response()->json(['status' => true, 'message' => '教練已通過審核']);
+    }
+
+    public function reject(Request $request, int $userId)
+    {
+        $data = $request->validate(['reason' => 'required|string|max:500']);
+
+        $profile = $this->findProviderProfile($userId);
+
+        if (!$profile->verification_status->canTransitionTo(VerificationStatus::Rejected)) {
+            return response()->json(['status' => false, 'message' => '當前狀態無法駁回'], 422);
+        }
+
+        $profile->update([
+            'verification_status' => VerificationStatus::Rejected,
+            'rejection_reason'    => $data['reason'],
+        ]);
+
+        Cache::tags(['diving_offers'])->flush();
+
+        $this->notify($profile->user, new ProviderVerificationRejectedNotification($data['reason']));
+
+        return response()->json(['status' => true, 'message' => '已駁回，教練將收到原因通知']);
+    }
+
+    private function findProviderProfile(int $userId)
+    {
+        return User::where('role', 'provider')->findOrFail($userId)->providerProfile()->firstOrFail();
+    }
+
+    private function notify(User $provider, object $notification): void
+    {
+        try {
+            $provider->notify($notification);
+        } catch (\Throwable $e) {
+            Log::error('ProviderVerification notification failed: ' . $e->getMessage());
+        }
+    }
+}

app/Http/Controllers/API/MemberBookingController.php

@@ -48,9 +48,10 @@ class MemberBookingController extends Controller
         $schedule = CourseSchedule::with('divingOffer.provider.providerProfile')->findOrFail($data['schedule_id']);
 
         // Layer 1：快速失敗
-        // 可見性繞過防護：課程屬未驗證教練時不可建立新預約（既有預約不受影響，見 provider-verification 規格）
+        // 可見性繞過防護：課程教練未通過審核時不可建立新預約（既有預約不受影響，見 provider-verification 規格）
         $offer = $schedule->divingOffer;
         if ($offer->provider_id !== null && !($offer->provider?->providerProfile?->is_verified)) {
+            // is_verified 為 accessor（= verification_status === approved）
             return response()->json(['status' => false, 'message' => '此課程目前不開放預約'], 422);
         }
         if ($schedule->status !== ScheduleStatus::Open) {

app/Http/Controllers/API/ProviderVerificationController.php

@@ -0,0 +1,113 @@
+<?php
+
+namespace App\Http\Controllers\API;
+
+use App\Enums\VerificationStatus;
+use App\Http\Controllers\Controller;
+use App\Models\ProviderCertification;
+use App\Traits\CompressesImages;
+use Illuminate\Http\Request;
+
+class ProviderVerificationController extends Controller
+{
+    use CompressesImages;
+
+    private const MAX_CERTIFICATIONS = 3;
+
+    public function show(Request $request)
+    {
+        $profile = $request->user()->providerProfile;
+
+        return response()->json([
+            'status' => true,
+            'data'   => [
+                'verification_status' => $profile->verification_status->value,
+                'rejection_reason'    => $profile->rejection_reason,
+                'certifications'      => $request->user()->providerCertifications
+                    ->map(fn($c) => ['id' => $c->id, 'url' => $c->url])->values(),
+            ],
+        ]);
+    }
+
+    public function uploadCertification(Request $request)
+    {
+        $request->validate([
+            'image' => 'required|image|mimes:jpg,jpeg,png,webp|max:10240',
+        ]);
+
+        if ($err = $this->ensureCertificationsEditable($request)) {
+            return $err;
+        }
+
+        $user = $request->user();
+
+        if ($user->providerCertifications()->count() >= self::MAX_CERTIFICATIONS) {
+            return response()->json(['status' => false, 'message' => '證照最多 3 張'], 422);
+        }
+
+        $path = $this->compressToJpeg($request->file('image'), "providers/{$user->id}/certifications");
+
+        $certification = ProviderCertification::create([
+            'user_id'    => $user->id,
+            'image_path' => $path,
+        ]);
+
+        return response()->json([
+            'status'  => true,
+            'message' => '證照已上傳',
+            'data'    => ['id' => $certification->id, 'url' => $certification->url],
+        ], 201);
+    }
+
+    public function deleteCertification(Request $request, int $id)
+    {
+        $certification = ProviderCertification::findOrFail($id);
+
+        if ($certification->user_id !== $request->user()->id) {
+            return response()->json(['status' => false, 'message' => '無權刪除此證照'], 403);
+        }
+
+        if ($err = $this->ensureCertificationsEditable($request)) {
+            return $err;
+        }
+
+        $certification->delete();
+
+        return response()->json(['status' => true, 'message' => '證照已刪除']);
+    }
+
+    public function submit(Request $request)
+    {
+        $user    = $request->user();
+        $profile = $user->providerProfile;
+
+        if (!$profile->verification_status->canTransitionTo(VerificationStatus::Pending)) {
+            return response()->json(['status' => false, 'message' => '當前狀態無法送審'], 422);
+        }
+
+        if ($user->providerCertifications()->count() < 1) {
+            return response()->json(['status' => false, 'message' => '請先上傳至少 1 張證照'], 422);
+        }
+
+        $profile->update([
+            'verification_status' => VerificationStatus::Pending,
+            'rejection_reason'    => null,
+        ]);
+
+        return response()->json(['status' => true, 'message' => '已送出審核，請等待平台審核結果']);
+    }
+
+    /**
+     * 證照僅於 unsubmitted / rejected 可增刪：pending / approved 是審核依據，不可變動
+     */
+    private function ensureCertificationsEditable(Request $request)
+    {
+        $status = $request->user()->providerProfile->verification_status;
+
+        if (!in_array($status, [VerificationStatus::Unsubmitted, VerificationStatus::Rejected])) {
+            return response()->json(['status' => false, 'message' => '審核期間或通過後不可變更證照'], 422);
+        }
+
+        return null;
+    }
+}