feat(redaction): update to embedPDF v2.4.0 with unified redaction mode support (#5652)

# Description of Changes


Bump to EmbedPDF v2.4.0 plus update to the redaction methods


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## Checklist

### General

- [X] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [X] 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)
- [X] I have performed a self-review of my own code
- [X] 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)

- [X] 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.

---------

Signed-off-by: Balázs Szücs <[email protected]>

frontend/src/core/components/viewer/AnnotationAPIBridge.tsx

@@ -88,6 +88,7 @@ type AnnotationApiSurface = {
   deselectAnnotation?: () => void;
   updateAnnotation?: (pageIndex: number, annotationId: string, patch: AnnotationPatch) => void;
   onAnnotationEvent?: (listener: (event: AnnotationEvent) => void) => void | (() => void);
+  purgeAnnotation?: (pageIndex: number, annotationId: string) => void;
 };
 
 type ToolDefaultsBuilder = (options?: AnnotationToolOptions) => AnnotationDefaults;
@@ -372,6 +373,11 @@ export const AnnotationAPIBridge = forwardRef<AnnotationAPI>(function Annotation
         const api = annotationApi as AnnotationApiSurface | undefined;
         return api?.getActiveTool?.() ?? null;
       },
+
+      purgeAnnotation: (pageIndex: number, annotationId: string) => {
+        const api = annotationApi as AnnotationApiSurface | undefined;
+        api?.purgeAnnotation?.(pageIndex, annotationId);
+      },
     }),
     [annotationApi, configureAnnotationTool, buildAnnotationDefaults]
   );