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>

database/seeders/DemoSeeder.php

@@ -65,7 +65,7 @@ class DemoSeeder extends Seeder
                 'services'      => '體驗潛水,OW認證課程,AOW認證課程,夜潛,水下攝影',
                 'certifications' => 'PADI 五星級潛水中心,PADI Course Director',
                 'facilities'    => '空氣填充站,氧氣填充站,裝備租借,沖洗區,更衣室,停車場',
-                'business_hours' => '每日 07:30–18:00', 'is_verified' => true,
+                'business_hours' => '每日 07:30–18:00', 'verification_status' => 'approved',
             ],
             [
                 'email' => 'greendive@cfdive.com', 'name' => '陳美玲',
@@ -77,7 +77,7 @@ class DemoSeeder extends Seeder
                 'services'      => '體驗潛水,OW認證課程,AOW認證課程,水下生態導覽,浮潛',
                 'certifications' => 'PADI 潛水中心,SSI 認證教練',
                 'facilities'    => '空氣填充站,裝備租借,防寒衣洗滌區,水下攝影記錄',
-                'business_hours' => '每日 07:00–17:30', 'is_verified' => true,
+                'business_hours' => '每日 07:00–17:30', 'verification_status' => 'approved',
             ],
             [
                 'email' => 'islet@cfdive.com', 'name' => '張大偉',
@@ -89,7 +89,7 @@ class DemoSeeder extends Seeder
                 'services'      => '浮潛,體驗潛水,OW認證課程,海龜觀察導覽',
                 'certifications' => 'PADI 授權潛水中心',
                 'facilities'    => '裝備租借,沖洗區,更衣室,代訂民宿服務',
-                'business_hours' => '每日 08:00–17:00', 'is_verified' => true,
+                'business_hours' => '每日 08:00–17:00', 'verification_status' => 'approved',
             ],
             [
                 'email' => 'northdive@cfdive.com', 'name' => '王建國',
@@ -101,7 +101,7 @@ class DemoSeeder extends Seeder
                 'services'      => '體驗潛水,OW認證課程,進階課程,Tec潛水,洞穴入門',
                 'certifications' => 'PADI 課程總監,PADI TecRec 教練',
                 'facilities'    => '空氣填充站,混氣填充站,裝備租借,技術潛水裝備維修',
-                'business_hours' => '週一公休，週二至週日 08:00–18:00', 'is_verified' => false,
+                'business_hours' => '週一公休，週二至週日 08:00–18:00', 'verification_status' => 'pending',
             ],
         ];
 
@@ -123,7 +123,7 @@ class DemoSeeder extends Seeder
                 'certifications' => $data['certifications'],
                 'facilities'     => $data['facilities'],
                 'business_hours' => $data['business_hours'],
-                'is_verified'    => $data['is_verified'],
+                'verification_status' => $data['verification_status'],
                 'rating'         => 0,
             ]);
             $providers[] = $user;

database/seeders/DevelopmentSeeder.php

@@ -35,7 +35,7 @@ class DevelopmentSeeder extends Seeder
             'description'   => '專業 PADI 認證教練，10 年教學經驗',
             'contact_phone' => '0912345678',
             'contact_email' => 'coach@cfdive.com',
-            'is_verified'   => true,
+            'verification_status' => 'approved',
         ]);
 
         // Member