Add edit table of contents tool to React UI (#4917)

## Summary
- add a dedicated edit table of contents tool to the React UI, complete
with bookmark editor, import/export actions, and parameter handling
- register the tool in the translated registry and extend the English
translations with the new strings
- wire up the backend endpoints through a new operation hook and
form-data serialization helpers

## Testing
- ./gradlew build

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[Codex
Task](https://chatgpt.com/codex/tasks/task_b_691a4a87a9c4832899ecd1c55989f27f)

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Co-authored-by: Reece Browne <[email protected]>

frontend/src/core/hooks/tools/editTableOfContents/useEditTableOfContentsOperation.ts

@@ -0,0 +1,31 @@
+import { useTranslation } from 'react-i18next';
+import { ToolType, type ToolOperationConfig, useToolOperation } from '@app/hooks/tools/shared/useToolOperation';
+import { createStandardErrorHandler } from '@app/utils/toolErrorHandler';
+import { EditTableOfContentsParameters } from '@app/hooks/tools/editTableOfContents/useEditTableOfContentsParameters';
+import { serializeBookmarkNodes } from '@app/utils/editTableOfContents';
+
+const buildFormData = (parameters: EditTableOfContentsParameters, file: File): FormData => {
+  const formData = new FormData();
+  formData.append('fileInput', file);
+  formData.append('replaceExisting', String(parameters.replaceExisting));
+  formData.append('bookmarkData', JSON.stringify(serializeBookmarkNodes(parameters.bookmarks)));
+  return formData;
+};
+
+export const editTableOfContentsOperationConfig: ToolOperationConfig<EditTableOfContentsParameters> = {
+  toolType: ToolType.singleFile,
+  operationType: 'editTableOfContents',
+  endpoint: '/api/v1/general/edit-table-of-contents',
+  buildFormData,
+};
+
+export const useEditTableOfContentsOperation = () => {
+  const { t } = useTranslation();
+  return useToolOperation<EditTableOfContentsParameters>({
+    ...editTableOfContentsOperationConfig,
+    getErrorMessage: createStandardErrorHandler(
+      t('editTableOfContents.error.failed', 'Failed to update the table of contents')
+    ),
+  });
+};
+

frontend/src/core/hooks/tools/editTableOfContents/useEditTableOfContentsParameters.ts

@@ -0,0 +1,37 @@
+import { useCallback } from 'react';
+import { useBaseParameters, type BaseParametersHook } from '@app/hooks/tools/shared/useBaseParameters';
+import { BookmarkNode } from '@app/utils/editTableOfContents';
+
+export interface EditTableOfContentsParameters {
+  replaceExisting: boolean;
+  bookmarks: BookmarkNode[];
+}
+
+export interface EditTableOfContentsParametersHook extends BaseParametersHook<EditTableOfContentsParameters> {
+  setBookmarks: (bookmarks: BookmarkNode[]) => void;
+}
+
+const defaultParameters: EditTableOfContentsParameters = {
+  replaceExisting: true,
+  bookmarks: [],
+};
+
+export const useEditTableOfContentsParameters = (): EditTableOfContentsParametersHook => {
+  const base = useBaseParameters<EditTableOfContentsParameters>({
+    defaultParameters,
+    endpointName: 'edit-table-of-contents',
+  });
+
+  const setBookmarks = useCallback((bookmarks: BookmarkNode[]) => {
+    base.setParameters(prev => ({
+      ...prev,
+      bookmarks,
+    }));
+  }, [base.setParameters]);
+
+  return {
+    ...base,
+    setBookmarks,
+  };
+};
+