Fix SAML login "something went wrong" when language list = 1 (#5750)

# Description of Changes

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Please provide a summary of the changes, including:

- What was changed
- Why the change was made
- Any challenges encountered

Closes #(issue_number)
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---

## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### Translations (if applicable)

- [ ] I ran
[`scripts/counter_translation.py`](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/docs/counter_translation.md)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.

frontend/src/core/components/tools/compare/CompareDocumentPane.tsx

@@ -74,6 +74,11 @@ const CompareDocumentPane = ({
     }
   }, [zoom]);
 
+  const renderedPageNumbers = useMemo(
+    () => new Set(pages.map((p) => p.pageNumber)),
+    [pages]
+  );
+
   return (
     <div className="compare-pane">
       <div className="compare-header">
@@ -88,7 +93,7 @@ const CompareDocumentPane = ({
                 placeholder={dropdownPlaceholder ?? null}
                 className={pane === 'comparison' ? 'compare-changes-select--comparison' : undefined}
                 onNavigate={onNavigateChange}
-                renderedPageNumbers={useMemo(() => new Set(pages.map(p => p.pageNumber)), [pages])}
+                renderedPageNumbers={renderedPageNumbers}
               />
             )}
           </Group>

frontend/src/core/components/tools/editTableOfContents/EditTableOfContentsWorkbenchView.tsx

@@ -43,6 +43,16 @@ interface EditTableOfContentsWorkbenchViewProps {
 const EditTableOfContentsWorkbenchView = ({ data }: EditTableOfContentsWorkbenchViewProps) => {
   const { t } = useTranslation();
   const terminology = useFileActionTerminology();
+  const files = data?.files ?? [];
+  const thumbnails = data?.thumbnails ?? [];
+  const previewFiles = useMemo(
+    () =>
+      files.map((file, index) => ({
+        file,
+        thumbnail: thumbnails[index],
+      })),
+    [files, thumbnails]
+  );
 
   if (!data) {
     return (
@@ -63,8 +73,6 @@ const EditTableOfContentsWorkbenchView = ({ data }: EditTableOfContentsWorkbench
     bookmarks,
     selectedFileName,
     disabled,
-    files,
-    thumbnails,
     downloadUrl,
     downloadFilename,
     errorMessage,
@@ -78,15 +86,6 @@ const EditTableOfContentsWorkbenchView = ({ data }: EditTableOfContentsWorkbench
     onFileClick,
   } = data;
 
-  const previewFiles = useMemo(
-    () =>
-      files?.map((file, index) => ({
-        file,
-        thumbnail: thumbnails[index],
-      })) ?? [],
-    [files, thumbnails]
-  );
-
   const showResults = Boolean(
     previewFiles.length > 0 || downloadUrl || errorMessage
   );

frontend/src/core/components/tools/shared/FilesToolStep.tsx

@@ -1,7 +1,7 @@
 import React from 'react';
-import { useTranslation } from 'react-i18next';
 import FileStatusIndicator from '@app/components/tools/shared/FileStatusIndicator';
 import { StirlingFile } from '@app/types/fileContext';
+import i18n from '@app/i18n';
 
 export interface FilesToolStepProps {
   selectedFiles: StirlingFile[];
@@ -14,9 +14,7 @@ export function createFilesToolStep(
   createStep: (title: string, props: any, children?: React.ReactNode) => React.ReactElement,
   props: FilesToolStepProps
 ): React.ReactElement {
-  const { t } = useTranslation();
-
-  return createStep(t("files.title", "Files"), {
+  return createStep(i18n.t("files.title", "Files"), {
     isVisible: true,
     isCollapsed: props.isCollapsed,
     onCollapsedClick: props.onCollapsedClick

frontend/src/core/components/tools/shared/ReviewToolStep.tsx

@@ -12,6 +12,7 @@ import { useFileActionIcons } from "@app/hooks/useFileActionIcons";
 import { saveOperationResults } from "@app/services/operationResultsSaveService";
 import { useFileActions, useFileState } from "@app/contexts/FileContext";
 import { FileId } from "@app/types/fileContext";
+import i18n from "@app/i18n";
 
 export interface ReviewToolStepProps<TParams = unknown> {
   isVisible: boolean;
@@ -151,10 +152,8 @@ export function createReviewToolStep<TParams = unknown>(
   ) => React.ReactElement,
   props: ReviewToolStepProps<TParams>
 ): React.ReactElement {
-  const { t } = useTranslation();
-
   return createStep(
-    t("review", "Review"),
+    i18n.t("review", "Review"),
     {
       isVisible: props.isVisible,
       isCollapsed: props.isCollapsed,

frontend/src/core/components/tools/shared/ToolStep.tsx

@@ -80,8 +80,6 @@ const ToolStep = ({
   alwaysShowTooltip = false,
   tooltip
 }: ToolStepProps) => {
-  if (!isVisible) return null;
-
   const parent = useContext(ToolStepContext);
 
   // Auto-detect if we should show numbers based on sibling count or force option
@@ -91,6 +89,8 @@ const ToolStep = ({
     return parent ? parent.visibleStepCount >= 3 : false; // Auto-detect
   }, [showNumber, parent]);
 
+  if (!isVisible) return null;
+
   const stepNumber = _stepNumber;
 
   return (