Support <span> elements with multiple inline styles in the Confluence Cloud Editor storage format.

Current behavior
In the Confluence Cloud Editor:

• Content is stored in the storage format (XHTML/XML).
• When HTML or HTML-like content is brought into the editor (e.g., via API, macro output, or copy/paste), <span> elements that contain multiple inline CSS properties on a single style attribute are:

• • Sanitized, flattened, or partially stripped, or
  • Not reliably round-tripped when the page is edited and re-saved.

• As a result, combinations like:
   

<td style="padding: 10.0px;text-align: center;vertical-align: middle;"> 
  <span style="display: inline-block;background-color: rgb(174,42,25);color: white;padding: 4.0px 8.0px;border-radius: 4.0px;font-weight: bold;min-width: 50.0px;"> 50 </span>
</td>

may lose one or more style properties after being processed by the editor and storage-format pipeline.

This behavior breaks certain HTML-based integrations, macro/app outputs, and formatting migrations where multiple inline styles on a single span are required for fidelity.

Expected behavior

• Confluence Cloud Editor and its underlying storage format should:
  • Allow a single <span> node to carry multiple inline CSS properties in its style attribute (e.g. display, background-color, color, padding, border-radius, font-weight, min-width, etc.) as long as they are safe and supported.
  • Preserve these multiple properties in storage format without silently dropping or merging them in a way that changes the visual result.
  • Round-trip them losslessly:
    • When content is created/updated via the REST API or apps.
    • When users edit the page in the editor and re-save it.