Internationalize validation error message

Replaced hardcoded "Validation failed" message with translated
version from language files:
- Updated userProfileActions.ts to use t("validation-failed")
- Added translations in English and Croatian
- Reordered general-error div in AccountForm for better layout

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/lib/actions/userProfileActions.ts

@@ -77,7 +77,7 @@ export const updateUserProfile = withUser(async (user: AuthenticatedUser, prevSt
     if (!validatedFields.success) {
         return {
             errors: validatedFields.error.flatten().fieldErrors,
-            message: "Validation failed",
+            message: t("validation-failed"),
             success: false,
         };
     }

app/ui/AccountForm.tsx

@@ -143,14 +143,6 @@ const FormFields: FC<FormFieldsProps> = ({ profile, errors, message }) => {
                 </div>
             </div>
 
-            <div id="general-error" aria-live="polite" aria-atomic="true">
-                {message && (
-                    <p className="mt-2 text-sm text-red-500">
-                        {message}
-                    </p>
-                )}
-            </div>
-
             {hasMissingData && (
                 <div className="alert mt-4 max-w-md flex flex-row items-start">
                     <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" className="stroke-current shrink-0 w-6 h-6">
@@ -160,6 +152,14 @@ const FormFields: FC<FormFieldsProps> = ({ profile, errors, message }) => {
                 </div>
             )}
 
+            <div id="general-error" aria-live="polite" aria-atomic="true">
+                {message && (
+                    <p className="mt-2 text-sm text-red-500">
+                        {message}
+                    </p>
+                )}
+            </div>
+
             <div className="pt-4">
                 <button className="btn btn-primary w-[5.5em]" disabled={pending}>
                     {pending ? (