fix: cherry-pick subtitle + published-print date fix from giancarlodigi/ZotMeta

[Copilot]

Applies the fix from giancarlodigi/ZotMeta#master (upstream PR RoadToDream/ZotMeta#14) to address two CrossRef metadata parsing bugs:

• Subtitle dropped from title — subtitle[0] was silently ignored; now appended with ": " separator (falls back to subtitle-only if no main title)
• Wrong publication year — published.date-parts (online-first date) was used instead of published-print.date-parts (volume/issue date)

// subtitle handling
var Subtitles = Utilities.safeGetFromJson(dataJson, ["subtitle"]); 
if (Subtitles && Subtitles.length > 0) { 
    var subtitleText = Subtitles[0]; 
    Title = Title ? Title + ": " + subtitleText : subtitleText; 
}

// prefer print date over online date
var publishedPrintDate = Utilities.safeGetFromJson(dataJson, ["published-print", "date-parts"]); 
if (publishedPrintDate && publishedPrintDate.length > 0) { 
    PublishDate = this.generateDate(publishedPrintDate); 
} 

Original prompt

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This section details on the original issue you should resolve

<issue_title>Pick RoadToDream#14</issue_title>
<issue_description></issue_description>

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

• Fixes Pick https://github.com/RoadToDream/ZotMeta/pull/14 #1

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[jeanwsr]

@copilot can you fetch the original author's commit instead of rewrite one.

[Copilot]

@copilot can you fetch the original author's commit instead of rewrite one.

Done. Replaced the rewrite with the exact file content from the original author's commit (giancarlodigi@9819352) — the diff against the base now matches the original PR exactly (blob SHA e398fd9..05513e4). Committed in 1208955.