feat: 完成独立的邀请与达人榜系统架构

app/Http/Controllers/AuthController.php

@@ -105,6 +105,16 @@ class AuthController extends Controller
             return response()->json(['status' => 'error', 'message' => '该用户名已被系统禁止注册，请更换其他名称。'], 422);
         }
 
+        // --- 提取邀请人 Cookie ---
+        $inviterIdCookie = $request->cookie('inviter_id');
+        $inviterId = null;
+        if ($inviterIdCookie && is_numeric($inviterIdCookie)) {
+            // 简单校验邀请人是否存在，防止脏数据
+            if (User::where('id', $inviterIdCookie)->exists()) {
+                $inviterId = (int) $inviterIdCookie;
+            }
+        }
+
         $newUser = User::create([
             'username' => $username,
             'password' => Hash::make($password),
@@ -113,10 +123,16 @@ class AuthController extends Controller
             'user_level' => 1, // 默认普通用户等级
             'sex' => $sex,
             'usersf' => '1.gif', // 默认头像
+            'inviter_id' => $inviterId, // 记录邀请人
         ]);
 
         $this->performLogin($newUser, $ip);
 
+        // 如果是通过邀请注册的，响应成功后建议清除 Cookie，防止污染后续注册
+        if ($inviterId) {
+            \Illuminate\Support\Facades\Cookie::queue(\Illuminate\Support\Facades\Cookie::forget('inviter_id'));
+        }
+
         return response()->json(['status' => 'success', 'message' => '注册并登录成功！']);
     }