feat:實作 Member Portal MVP 前端與後端整合

後端：
- 新增 DivingOffer Model / DivingOfferController（列表+詳情 API，支援搜尋/篩選/分頁）
- 修正 Google OAuth callback 改為 redirect 至前端（SocialAuthController）
- 新增 config/cors.php 允許前端 origin
- .gitignore 新增 frontend/ 排除規則

前端（frontend/）：
- Vue 3 + Vite + Tailwind CSS + Pinia + Vue Router
- 頁面：首頁、課程列表、課程詳情、登入、註冊、個人資料、OAuth callback
- 整合至 Docker（multi-stage build，nginx 靜態服務於 port 5173）

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

app/Http/Controllers/API/DivingOfferController.php

@@ -0,0 +1,63 @@
+<?php
+
+namespace App\Http\Controllers\API;
+
+use App\Http\Controllers\Controller;
+use App\Models\DivingOffer;
+use Illuminate\Http\Request;
+
+class DivingOfferController extends Controller
+{
+    public function index(Request $request)
+    {
+        $perPage = min((int) $request->query('per_page', 12), 50);
+
+        $query = DivingOffer::query();
+
+        if ($q = $request->query('q')) {
+            $query->where(function ($sub) use ($q) {
+                $sub->where('title', 'like', "%{$q}%")
+                    ->orWhere('location', 'like', "%{$q}%")
+                    ->orWhere('spot', 'like', "%{$q}%");
+            });
+        }
+
+        if ($region = $request->query('region')) {
+            $query->where('region', $region);
+        }
+
+        if ($tag = $request->query('tag')) {
+            $query->where('tag', 'like', "%{$tag}%");
+        }
+
+        $paginated = $query->paginate($perPage);
+
+        return response()->json([
+            'status' => true,
+            'data'   => $paginated->items(),
+            'meta'   => [
+                'total'        => $paginated->total(),
+                'per_page'     => $paginated->perPage(),
+                'current_page' => $paginated->currentPage(),
+                'last_page'    => $paginated->lastPage(),
+            ],
+        ]);
+    }
+
+    public function show(int $id)
+    {
+        $offer = DivingOffer::find($id);
+
+        if (!$offer) {
+            return response()->json([
+                'status'  => false,
+                'message' => '課程不存在',
+            ], 404);
+        }
+
+        return response()->json([
+            'status' => true,
+            'data'   => $offer,
+        ]);
+    }
+}

app/Http/Controllers/API/SocialAuthController.php

@@ -105,24 +105,10 @@ class SocialAuthController extends Controller
             
             // 生成 Sanctum token
             $token = $user->createToken('google-auth')->plainTextToken;
-            
-            // 載入會員資料
-            $user->load('memberProfile');
-            
-            return response()->json([
-                'status' => true,
-                'message' => 'Google 登入成功',
-                'data' => [
-                    'user' => $user,
-                    'token' => $token,
-                    'token_type' => 'Bearer',
-                ]
-            ]);
+
+            return redirect(env('FRONTEND_URL') . '/auth/callback?token=' . $token);
         } catch (\Exception $e) {
-            return response()->json([
-                'status' => false,
-                'message' => 'Google 登入失敗：' . $e->getMessage()
-            ], 500);
+            return redirect(env('FRONTEND_URL') . '/login?error=oauth_failed');
         }
     }
 }

app/Models/DivingOffer.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class DivingOffer extends Model
+{
+    public $timestamps = false;
+
+    protected $table = 'diving_offers';
+
+    protected $fillable = [
+        'title',
+        'location',
+        'spot',
+        'rating',
+        'reviews',
+        'price',
+        'badges',
+        'description',
+        'tag',
+        'region',
+    ];
+
+    protected $casts = [
+        'badges' => 'array',
+        'rating' => 'float',
+        'price'  => 'integer',
+        'reviews'=> 'integer',
+    ];
+}