Display fragment labels with identifier and folio on manuscript profiles

[Copilot]

Manuscript fragments were listed as "Witness Fragment #1", "#2", etc., making them difficult to identify without clicking through. Fragments should display their shelfmark/citation and folio information.

Changes

Modified manuscriptProfile template in js/deer-config.js to:

• Fetch fragment data asynchronously using deerUtils.expand(uri)
• Extract identifier (shelfmark/citation) and _folio (page) properties
• Display labels with priority: "identifier - folio" → "identifier" → "Folio X" → "Witness Fragment #N"
• Handle fetch errors gracefully with fallback to numbered labels

Example

Before:

• Witness Fragment #1
• Witness Fragment #2

After:

• St. Gall, Stiftsbibliothek 132 - 45r
• Kuttner, Repertorium - 102v

Original prompt

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This section details on the original issue you should resolve

<issue_title>Better labels for manuscript profiles</issue_title>
<issue_description>On manuscript-profile.html, the fragments are listed as "manuscript fragment #2" and just a long series of indexes. When possible, the pattern should be used where we see the fragment label with the reference locator or citation that is associated with it.</issue_description>

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

• Fixes Better labels for manuscript profiles #299

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