Enable custom URLs for clipboard copy workaround

[nrichers]

Pull Request Description

What and why?

The rewriteUrls() function in vmurl-settings.js rewrites URLs in:

• section[data-background-iframe] attributes (background iframes)
• a[href] attributes (links)

But the function does not rewrite iframe[src] attributes, so the hardcoded URLs in _get-your-code-snippet.qmd and _retrieve-your-code-snippet.qmd are never updated when users set a custom URL.

This PR adds iframe src rewriting to the rewriteUrls() function, following the same pattern as existing rewrites.

How to test

• Set a custom ValidMind URL via the settings modal
• Verify code snippet iframes load from the custom URL on pages that use the workaround

Proof it works:

The custom URL is set to https://app.dev.vm.validmind.ai/, pointing to our dev environment instead of prod.

A page that embeds _get-your-code-snippet.qmd:

• The address bar shows this is a page where we use the workaround
• Inspection shows the iframe points to https://app.dev.vm.validmind.ai/

A page that embeds _retrieve-your-code-snippet.qmd:

• The address bar shows this is a page where we use the workaround
• Inspection shows the iframe points to https://app.dev.vm.validmind.ai/

What needs special review?

N/A

Dependencies, breaking changes, and deployment notes

None

Release notes

N/A — internal training slides update

Checklist

• What and why
• Screenshots or videos (Frontend)
• How to test
• What needs special review
• Dependencies, breaking changes, and deployment notes
• Labels applied
• PR linked to Shortcut
• Unit tests added (Backend)
• Tested locally
• Documentation updated (if required)
• Environment variable additions/changes documented (if required)

[github-actions]

Pull requests must include at least one of the required labels: internal, highlight, enhancement, bug, deprecation, documentation. Except for internal, pull requests must also include a description in the release notes section.

[validbeck]

This worked after I did the Developer Tools > Empty Cache & Hard Reload thing, before it gave me this:

So to user-proof this, I added commit #8eb6376 which does the emptying & hard-refreshing when users click the refresh page button.

[github-actions]

Lighthouse check results

⚠️ WARN: Average accessibility score is 0.87 (required: >0.9) — Check the workflow run

Show Lighthouse scores

Folder depth level checked: 0

Commit SHA: 65c9bfc

Modify the workflow to check a different depth:

• 0: Top-level navigation only — /index.html, /guide/guides.html, ...
• 1: All first-level subdirectories — /guide/.html, /developer/.html, ...
• 2: All second-level subdirectories — /guide/attestation/*.html, ...

Page	Accessibility	Performance	Best Practices	SEO
/developer/validmind-library.html	0.85	0.66	1.00	0.82
/get-started/get-started.html	0.85	0.61	1.00	0.73
/guide/guides.html	0.85	0.68	1.00	0.82
/index.html	0.93	0.65	1.00	0.82
/releases/all-releases.html	0.86	0.71	1.00	0.73
/support/support.html	0.91	0.61	1.00	0.82
/training/training.html	0.85	0.66	0.96	0.73

[github-actions]

PR Summary

This PR introduces two primary enhancements:

1. In the file site/training/assets/vmurl-settings.js, the URL rewriting logic has been extended to handle iframe elements. The script now selects iframes whose src attribute contains "app.prod.validmind.ai" and rewrites them using a custom URL. This ensures that iframes are updated in the same fashion as other elements on the page.

2. In the login slide pages (_log-in-with-jupyterhub.qmd and _log-in.qmd), the page refresh mechanism has been improved. Rather than using window.location.reload(), the refresh button now sets window.location.href to the current pathname with an appended query parameter (?nocache=timestamp). This approach forces a fresh fetch of the page content by circumventing potential browser caching issues.

Test Suggestions

• Test that iframes with src attributes containing 'app.prod.validmind.ai' are correctly updated with the custom URL.
• Click the refresh button to ensure that the page reloads with a new 'nocache' timestamp appended to the URL, bypassing the cache.
• Verify that other URL rewriting functionalities (e.g., for anchor links) remain unaffected.
• Perform cross-browser tests to confirm consistent behavior of the new refresh mechanism and iframe URL rewriting.

[github-actions]

Validate docs site

✓ INFO: A live preview of the docs site is available — Open the preview

[nrichers]

So to user-proof this, I added commit #8eb6376 which does the emptying & hard-refreshing when users click the refresh page button.

Thank you, @validbeck! I did not see this behaviour but I appreciate you adding a nocache directive to help our users. 🫶