Enhanced MHT Editor with Real-time Editing

I'll optimize the MHT editor to support direct editing in the view module with real-time preview of changes. This will create a more seamless editing experience where users can see their changes immediately.

Enhanced Real-time Editing Features

I've optimized the MHT editor to support direct editing in the view module with real-time preview. Here are the key improvements:

1. Integrated Editing Experience

The new EnhancedMhtViewer component combines viewing and editing in a single interface with three modes:

• Preview Mode: Shows the rendered MHT content as it would appear in a browser
• Visual Edit Mode: Allows direct WYSIWYG editing of the content
• Source Mode: Provides access to edit the raw HTML

2. Real-time Editing Capabilities

• Direct Element Editing: Click on any element in the visual editor to modify its text and styling
• Contextual Editing: The ElementEditor popover provides formatting controls specific to the selected element
• Immediate Feedback: Changes are reflected in real-time as you edit

3. Resource Management

The new Resource Manager allows you to:

• View all embedded resources in the MHT file
• Replace images with new ones
• Update resource URLs
• Delete unnecessary resources

4. Improved MHT Parsing

The MHT parser has been enhanced to better handle base64-encoded content, ensuring that embedded resources are properly extracted and displayed.

How to Use the Enhanced Editor

1. Upload an MHT file using the file uploader on the home page

2. Switch between modes using the toggle buttons at the top of the editor:

   • Preview: View the rendered content
   • Visual Edit: Edit content directly by clicking on elements
   • Source: Edit the raw HTML
3. Manage resources by clicking the "Manage Resources" button
4. Save your changes by clicking the "Apply Changes" button
5. Export to different formats using the Export button

This enhanced version provides a much more intuitive editing experience with immediate visual feedback, making it easier to modify MHT files while seeing exactly how the changes will look.

Let me fix the duplicate declaration error in the enhanced-mht-viewer.tsx file:

I've fixed the error by removing the duplicate declaration of the EnhancedMHTViewer component in the enhanced-mht-viewer.tsx file. The error occurred because I accidentally included two implementations of the same component.

The corrected file now contains a single declaration of the EnhancedMhtViewer component with all the functionality we need:

1. Three editing modes (Preview, Visual Edit, and Source)
2. Real-time editing capabilities
3. Element selection and editing through the ElementEditor component
4. Proper handling of embedded resources

This should resolve the "Identifier 'EnhancedMHTViewer' has already been declared" error and allow the application to function correctly when uploading MHT files.

You should now be able to:

1. Upload MHT files without errors
2. View the content in the preview mode
3. Edit the content directly in the visual edit mode
4. Modify the HTML source in the source mode
5. See your changes in real-time