UI changes to update and support auto updating

[Frooodle]

Description of Changes

UI changes to update panel,

Auto update now supported to download and run installer and restart all within app

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Checklist

General

• I have read the Contribution Guidelines
• I have read the Stirling-PDF Developer Guide (if applicable)
• I have read the How to add new languages to Stirling-PDF (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 (if functionality has heavily changed)
• I have read the section Add New Translation Tags (for new translation tags only)

Translations (if applicable)

• I ran scripts/counter_translation.py

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 for more details.

[stirlingbot]

🌐 TOML Translation Verification Summary

🔄 Reference Branch: pr-branch

📃 File Check: en-GB/translation.toml

1. Test Status: ✅ Passed
2. Test Status: ✅ Passed
3. Test Status: ✅ Passed

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✅ Overall Check Status: Success

Thanks @Frooodle for your help in keeping the translations up to date.

[stirlingbot]

✅ Frontend License Check Passed

All frontend licenses have been validated and no compatibility warnings were detected.

The frontend license report has been updated successfully.

[stirlingbot]

🚀 V2 Auto-Deployment Complete!

Your V2 PR with embedded architecture has been deployed!

🔗 Direct Test URL (non-SSL) http://54.175.155.236:6075

🔐 Secure HTTPS URL: https://6075.ssl.stirlingpdf.cloud

This deployment will be automatically cleaned up when the PR is closed.

🔄 Auto-deployed for approved V2 contributors.

[github-actions]

📦 Tauri Desktop Builds Ready!

The desktop applications have been built and are ready for testing.

Download Artifacts:

🐧 Linux x64: Download Stirling-PDF-linux-x86_64 (.deb, .AppImage) - 216.6 MB
🍎 macOS Intel: Download Stirling-PDF-macos-x86_64 (.dmg) - 211.7 MB
🪟 Windows x64: Download Stirling-PDF-windows-x86_64 (.exe, .msi) - 231.1 MB
🍎 macOS ARM64: Download Stirling-PDF-macos-aarch64 (.dmg) - 210.0 MB

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