fix(settings): extract shared response mappers to prevent server/client shape drift

Addresses PR review feedback — prefetch.ts duplicated response mapping logic from client hooks. Extracted mapGeneralSettingsResponse and mapUserProfileResponse as shared functions used by both client fetch and server prefetch.

apps/sim/app/workspace/[workspaceId]/settings/[section]/prefetch.ts

@@ -1,8 +1,8 @@
 import type { QueryClient } from '@tanstack/react-query'
 import { headers } from 'next/headers'
 import { getInternalApiBaseUrl } from '@/lib/core/utils/urls'
-import { generalSettingsKeys } from '@/hooks/queries/general-settings'
-import { userProfileKeys } from '@/hooks/queries/user-profile'
+import { generalSettingsKeys, mapGeneralSettingsResponse } from '@/hooks/queries/general-settings'
+import { mapUserProfileResponse, userProfileKeys } from '@/hooks/queries/user-profile'
 
 /**
  * Forwards incoming request cookies so server-side API fetches authenticate correctly.
@@ -29,17 +29,7 @@ export function prefetchGeneralSettings(queryClient: QueryClient) {
       })
       if (!response.ok) throw new Error(`Settings prefetch failed: ${response.status}`)
       const { data } = await response.json()
-      return {
-        autoConnect: data.autoConnect ?? true,
-        showTrainingControls: data.showTrainingControls ?? false,
-        superUserModeEnabled: data.superUserModeEnabled ?? true,
-        theme: data.theme || 'system',
-        telemetryEnabled: data.telemetryEnabled ?? true,
-        billingUsageNotificationsEnabled: data.billingUsageNotificationsEnabled ?? true,
-        errorNotificationsEnabled: data.errorNotificationsEnabled ?? true,
-        snapToGridSize: data.snapToGridSize ?? 0,
-        showActionBar: data.showActionBar ?? true,
-      }
+      return mapGeneralSettingsResponse(data)
     },
     staleTime: 60 * 60 * 1000,
   })
@@ -61,14 +51,7 @@ export function prefetchUserProfile(queryClient: QueryClient) {
       })
       if (!response.ok) throw new Error(`Profile prefetch failed: ${response.status}`)
       const { user } = await response.json()
-      return {
-        id: user.id,
-        name: user.name || '',
-        email: user.email || '',
-        image: user.image || null,
-        createdAt: user.createdAt,
-        updatedAt: user.updatedAt,
-      }
+      return mapUserProfileResponse(user)
     },
     staleTime: 5 * 60 * 1000,
   })

apps/sim/hooks/queries/general-settings.ts

@@ -28,6 +28,24 @@ export interface GeneralSettings {
   showActionBar: boolean
 }
 
+/**
+ * Map raw API response data to GeneralSettings with defaults.
+ * Shared by both client fetch and server prefetch to prevent shape drift.
+ */
+export function mapGeneralSettingsResponse(data: Record<string, unknown>): GeneralSettings {
+  return {
+    autoConnect: (data.autoConnect as boolean) ?? true,
+    showTrainingControls: (data.showTrainingControls as boolean) ?? false,
+    superUserModeEnabled: (data.superUserModeEnabled as boolean) ?? true,
+    theme: (data.theme as GeneralSettings['theme']) || 'system',
+    telemetryEnabled: (data.telemetryEnabled as boolean) ?? true,
+    billingUsageNotificationsEnabled: (data.billingUsageNotificationsEnabled as boolean) ?? true,
+    errorNotificationsEnabled: (data.errorNotificationsEnabled as boolean) ?? true,
+    snapToGridSize: (data.snapToGridSize as number) ?? 0,
+    showActionBar: (data.showActionBar as boolean) ?? true,
+  }
+}
+
 /**
  * Fetch general settings from API
  */
@@ -39,18 +57,7 @@ async function fetchGeneralSettings(signal?: AbortSignal): Promise<GeneralSettin
   }
 
   const { data } = await response.json()
-
-  return {
-    autoConnect: data.autoConnect ?? true,
-    showTrainingControls: data.showTrainingControls ?? false,
-    superUserModeEnabled: data.superUserModeEnabled ?? true,
-    theme: data.theme || 'system',
-    telemetryEnabled: data.telemetryEnabled ?? true,
-    billingUsageNotificationsEnabled: data.billingUsageNotificationsEnabled ?? true,
-    errorNotificationsEnabled: data.errorNotificationsEnabled ?? true,
-    snapToGridSize: data.snapToGridSize ?? 0,
-    showActionBar: data.showActionBar ?? true,
-  }
+  return mapGeneralSettingsResponse(data)
 }
 
 /**

apps/sim/hooks/queries/user-profile.ts

@@ -24,6 +24,21 @@ export interface UserProfile {
   updatedAt: string
 }
 
+/**
+ * Map raw API response user object to UserProfile.
+ * Shared by both client fetch and server prefetch to prevent shape drift.
+ */
+export function mapUserProfileResponse(user: Record<string, unknown>): UserProfile {
+  return {
+    id: user.id as string,
+    name: (user.name as string) || '',
+    email: (user.email as string) || '',
+    image: (user.image as string) || null,
+    createdAt: user.createdAt as string,
+    updatedAt: user.updatedAt as string,
+  }
+}
+
 /**
  * Fetch user profile from API
  */
@@ -35,15 +50,7 @@ async function fetchUserProfile(signal?: AbortSignal): Promise<UserProfile> {
   }
 
   const { user } = await response.json()
-
-  return {
-    id: user.id,
-    name: user.name || '',
-    email: user.email || '',
-    image: user.image || null,
-    createdAt: user.createdAt,
-    updatedAt: user.updatedAt,
-  }
+  return mapUserProfileResponse(user)
 }
 
 /**