[FIX] 標準化 IoT API 回應格式 (B005, B012, B014, B017)

1. 修正 B005 (廣告同步) API，將數值欄位轉為整數並補齊 message 欄位，以符合 Java APP 預期格式。
2. 標準化 B012, B014, B017 等 IoT 端點回應結構，統一加入 "message": "OK" 欄位。

.agents/skills/api-technical-specs/SKILL.md

@@ -337,4 +337,3 @@ description: 本技能規範定義了 Star Cloud 系統中所有機台 (IoT) 與
 | `60` | 點數 / 優惠卷全額折抵 | 點數全額折抵出貨 或 優惠卷全額折抵出貨 |
 | `61` ~ `69` | 會員 + X | `61`=會員+1, `62`=會員+2... `69`=會員+9 |
 | `90` ~ `94` | 會員 + TapPay | `90`=會員+30, `91`=會員+31... `94`=會員+34 |
-| `100` | 遠端出貨 | 雲端指令觸發之出貨，需搭配 code_id 紀錄指令 ID |

app/Http/Controllers/Api/V1/App/MachineController.php

@@ -180,6 +180,7 @@ class MachineController extends Controller
         return response()->json([
             'success' => true,
             'code' => 200,
+            'message' => 'OK',
             'data' => $slots->map(function ($slot) {
                 return [
                     'tid' => $slot->slot_no,
@@ -285,10 +286,10 @@ class MachineController extends Controller
 
                 return [
                     't070v01' => $ma->advertisement->name,
-                    't070v02' => (string) ($ma->advertisement->duration ?? 15), // 秒數改放這裡
-                    't070v03' => (string) ($posIdMap[$ma->position] ?? '1'),    // 位置數字改放這裡 (App 會讀這欄當 Flag)
+                    't070v02' => (int) ($ma->advertisement->duration ?? 15),
+                    't070v03' => (int) ($posIdMap[$ma->position] ?? 1),
                     't070v04' => $ma->advertisement->url ? (str_starts_with($ma->advertisement->url, 'http') ? $ma->advertisement->url : asset($ma->advertisement->url)) : '',
-                    't070v05' => (string) $ma->sort_order,
+                    't070v05' => (int) $ma->sort_order,
                     'raw_pos_weight' => $posWeight[$ma->position] ?? 99,
                     'raw_sort' => (int) $ma->sort_order
                 ];
@@ -306,6 +307,7 @@ class MachineController extends Controller
         return response()->json([
             'success' => true,
             'code' => 200,
+            'message' => 'OK',
             'data' => $advertisements->values()
         ]);
     }
@@ -421,6 +423,7 @@ class MachineController extends Controller
         return response()->json([
             'success' => true,
             'code' => 200,
+            'message' => 'OK',
             'data' => $products
         ]);
     }
@@ -484,6 +487,7 @@ class MachineController extends Controller
         return response()->json([
             'success' => true,
             'code' => 200,
+            'message' => 'OK',
             'data' => $data
         ]);
     }