Fix invalid HTML in Home.html: malformed h3 tag with stray span attribute

[iblawal]

Bug Description

In WebAPP/App/View/Home.html, there is invalid HTML on the subtitle line.

Current Code

<h3 span class="hidden-md hidden-sm hidden-xs" style="margin-top: 0px;">Modelling User Interface for Osemosys</span> </h3>

Problems Found

• <h3 span is invalid HTML — span is not a valid attribute for h3
• The closing tag </span> is mismatched since no <span> was properly opened
• This causes HTML validation errors and unpredictable rendering across browsers

Proposed Fix

<h3 class="hidden-md hidden-sm hidden-xs" style="margin-top: 0px;">Modelling User Interface for Osemosys</h3>

Why This Matters

• Improves HTML validity across all browsers
• Zero runtime risk — documentation and template only
• Aligns with cross-platform improvement goals for OG-CLEWS

I would like to work on this fix if the maintainers agree.