Merged in feat/LOY-158-signup-with-existing-email-error-handling (pull request #1441)

Feat/LOY-158 signup with existing email error handling

* feat(LOY-158): Add handling for email conflict during signup

- Implement specific error handling for email conflict in signup form
- Add localized error message for existing email accounts across language dictionaries
- Introduce new error type `conflictError` in trpc error handling

* fix(LOY-158): revert translation changes

* fix(LOY-158): Correct Finnish translation for cancellation message


Approved-by: Christian Andolf

apps/scandic-web/components/Forms/Signup/index.tsx

@@ -51,6 +51,15 @@ export default function SignupForm({ title }: SignUpFormProps) {
       }
     },
     onError: (error) => {
+      if (error.data?.code === "CONFLICT") {
+        toast.error(
+          intl.formatMessage({
+            id: "An account with this email already exists. Please try signing in instead.",
+          })
+        )
+        return
+      }
+
       toast.error(intl.formatMessage({ id: "Something went wrong!" }))
       console.error("Component Signup error:", error)
     },