Add image URL display with copy button to alt text extractor

[Copilot]

The alt text extractor now displays each image's URL alongside its alt text, with a dedicated copy button for quick URL extraction.

Changes

• Added "Image URL" section below alt text with URL display and copy button
• Styled URL display to match existing alt text section with word-break: break-all for long URLs
• Implemented copyUrl() function with clipboard API and fallback for older browsers
• Copy button shows "Copied!" feedback for 2 seconds after successful copy

Screenshot

Each extracted image now shows:

• Image preview
• Alt text with copy button
• Image URL with copy button (new)

Original prompt

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This section details on the original issue you should resolve

<issue_title>Show image URL in alt text extractor tool</issue_title>
<issue_description>Each image should have a URL shown with a copy button.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Show image URL in alt text extractor tool #105

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[cloudflare-workers-and-pages]

Deploying tools with    Cloudflare Pages

Latest commit:	bcab89b
Status:	✅  Deploy successful!
Preview URL:	https://10e1f4f1.tools-b1q.pages.dev
Branch Preview URL:	https://copilot-show-image-url-in-ex.tools-b1q.pages.dev

View logs

[simonw]

It works: https://10e1f4f1.tools-b1q.pages.dev/alt-text-extractor