add auto render checkbox on app edit page

[tavdog]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @tavdog, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a user-configurable option on the application configuration page to manage the automatic rendering of the app preview. This enhancement provides users with more control over the preview behavior, potentially improving performance or user experience by allowing them to manually trigger updates when desired, rather than on every change.

Highlights

• New 'Auto Render Preview' Checkbox: A new checkbox labeled 'Auto Render Preview' has been added to the app edit page, allowing users to control whether the app preview automatically updates.
• Conditional Preview Rendering: The logic for rendering the app preview has been updated to respect the state of the new 'Auto Render Preview' checkbox, skipping the preview update if the checkbox is unchecked.
• Internationalization Updates: New translation keys for 'Auto Render Preview' have been added for both English and German languages.

Changelog

• web/i18n/de.json
  • Added German translation for 'Auto Render Preview'.
• web/i18n/en.json
  • Added English translation for 'Auto Render Preview'.
• web/templates/manager/configapp.html
  • Inserted an 'Auto Render Preview' checkbox into the HTML template.
  • Implemented JavaScript logic to conditionally skip the app preview rendering based on the checkbox's state.

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[gemini-code-assist]

Code Review

This pull request adds a checkbox to enable or disable automatic preview rendering on the app edit page. The implementation is correct, including internationalization support. My only suggestion is to move the inline CSS for the new checkbox to a separate stylesheet to improve code maintainability. Overall, a good addition.

[gemini-code-assist]

To improve maintainability and adhere to the best practice of separating concerns, it's better to avoid using inline styles. Please move these styles into a dedicated CSS class within your stylesheet (e.g., configapp-simple.css).

You could define classes like these:

.auto-render-preview {
  text-align: center;
  margin: 8px 0;
}

.auto-render-preview-label {
  cursor: pointer;
  user-select: none;
  font-size: 0.9em;
}

Suggested change

	<div style="text-align:center; margin:8px 0;">
	<label style="cursor:pointer; user-select:none; font-size:0.9em;">
	<div class="auto-render-preview">
	<label class="auto-render-preview-label">