some fixes

apps/web/next.config.mjs

@@ -127,7 +127,7 @@ const nextConfig = {
       },
       {
         // matching all API routes
-        source: "/api/v1/client/:path*",
+        source: "/api/(v1|v2)/client/:path*",
         headers: [
           { key: "Access-Control-Allow-Credentials", value: "true" },
           { key: "Access-Control-Allow-Origin", value: "*" },

packages/ios/FormbricksSDK/FormbricksSDK/Formbricks.swift

@@ -91,6 +91,11 @@ import Network
             return
         }
         
+        if let existing = userManager?.userId, !existing.isEmpty {
+            logger?.error("A userId is already set (\"\(existing)\") – please call Formbricks.logout() before setting a new one.")
+            return
+        }
+        
         userManager?.set(userId: userId)
     }
     

packages/ios/FormbricksSDK/FormbricksSDK/Manager/UserManager.swift

@@ -95,6 +95,9 @@ final class UserManager: UserManagerSyncable {
                 self?.lastDisplayedAt = userResponse.data.state?.data?.lastDisplayAt
                 self?.expiresAt = userResponse.data.state?.expiresAt
                 
+                let serverLanguage = userResponse.data.state?.data?.language
+                Formbricks.language = serverLanguage ?? "default"
+                
                 self?.updateQueue?.reset()
                 self?.surveyManager?.filterSurveys()
                 self?.startSyncTimer()
@@ -128,6 +131,7 @@ final class UserManager: UserManagerSyncable {
         backingResponses = nil
         backingLastDisplayedAt = nil
         backingExpiresAt = nil
+        Formbricks.language = "default"
         updateQueue?.reset()
         
         if isUserIdDefined {

packages/ios/FormbricksSDK/FormbricksSDK/Model/User/UserStateDetails.swift

@@ -7,4 +7,5 @@ struct UserStateDetails: Codable {
     let displays: [Display]?
     let responses: [String]?
     let lastDisplayAt: Date?
+    let language: String?
 }

packages/ios/FormbricksSDK/FormbricksSDK/Networking/Queue/UpdateQueue.swift

@@ -61,6 +61,7 @@ final class UpdateQueue {
             } else {
                 // If no userId, just update locally without API call
                 Formbricks.logger?.debug("UpdateQueue - updating language locally: \(language)")
+                return
             }
             
             startDebounceTimer()