Resolving 4XX errors on the CDN

[max-ostapenko]

• Add icon existence checks and warnings in ComboBox, TechReport, and TableLinked components

[Copilot]

Pull request overview

This PR addresses 4XX errors on the CDN by adding defensive checks to prevent requests for missing icon files. The changes ensure that icon elements are only created and appended to the DOM when the icon property exists.

Key Changes:

• Added null/undefined checks for icon properties before creating icon elements across multiple components
• Improved URL encoding approach in getTechInfo() to use encodeURIComponent with proper join syntax

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
src/js/techreport/tableLinked.js	Added icon existence check before creating background-image span element
src/js/techreport/index.js	Added icon checks in getTechInfo() and updateDrilldownComponents(), improved URL encoding for technology parameters
src/js/techreport/combobox.js	Added icon existence checks before creating img elements in dropdown options and selected items display

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[Copilot]

Inconsistent URL encoding: The icon at line 35 is used directly without encodeURI(), but the icon at line 206 uses encodeURI(icon). For consistency and to prevent potential URL issues with special characters in icon filenames, both should use encodeURI() or encodeURIComponent().

Suggested change

	logo.setAttribute('src', `https://cdn.httparchive.org/v1/static/icons/${icon}`);
	logo.setAttribute('src', `https://cdn.httparchive.org/v1/static/icons/${encodeURI(icon)}`);