[Code scan] Render Docs dropdown subitems in the mobile menu

[njzjz]

This issue is a result of a Codex global code scan of deepmodeling/deepmodeling_sphinx at commit 156679f.

Problem

The desktop banner renders item.subitem entries under the Docs dropdown, but the mobile menu only renders the top-level items. On mobile, users cannot directly reach DeePMD-kit, DP-GEN, dpdata, DPDispatcher, ABACUS, DeepFlame, or DPTI from the banner menu.

Code references:

deepmodeling_sphinx/deepmodeling_sphinx/config.py

Lines 5 to 26 in 156679f

	{
	"title": "Docs",
	"url": "https://docs.deepmodeling.com/",
	"subitem": [
	{
	"title": "DeePMD-kit",
	"url": "https://docs.deepmodeling.com/projects/deepmd/",
	},
	{"title": "DP-GEN", "url": "https://docs.deepmodeling.com/projects/dpgen/"},
	{
	"title": "dpdata",
	"url": "https://docs.deepmodeling.com/projects/dpdata/",
	},
	{
	"title": "DPDispatcher",
	"url": "https://docs.deepmodeling.com/projects/dpdispatcher/",
	},
	{"title": "ABACUS", "url": "https://abacus.deepmodeling.com/"},
	{"title": "DeepFlame", "url": "https://deepflame.deepmodeling.com/"},
	{"title": "DPTI", "url": "https://docs.deepmodeling.com/projects/dpti/"},
	],
	},

deepmodeling_sphinx/deepmodeling_sphinx/banner.html

Lines 20 to 53 in 156679f

	<div class="main-menu">
	<ul>
	{% for item in items %}
	<li class="{{ item.class }}">
	{% if item.subitem %}
	<div
	id="resourcesDropdownButton"
	data-toggle="resources-dropdown"
	class="resources-dropdown"
	>
	<a
	href="{{ item.url }}"
	class="resource-option with-down-orange-arrow"
	>
	{{ item.title }}
	</a>
	<div class="resources-dropdown-menu">
	{% for subitem in item.subitem %}
	<a
	class="doc-dropdown-option nav-dropdown-item"
	href="{{ subitem.url }}"
	>
	<span class="dropdown-title">{{ subitem.title }}</span>
	<p></p>
	</a>
	{% endfor %}
	</div>
	</div>
	{% else %}
	<a href="{{ item.url }}">{{ item.title }}</a>
	{% endif %}
	</li>
	{% endfor %}
	</ul>

deepmodeling_sphinx/deepmodeling_sphinx/banner.html

Lines 83 to 92 in 156679f

	<div class="mobile-main-menu-links-container">
	<div class="main-menu">
	<ul>
	{% for item in items %}
	<li>
	<a href="{{ item.url }}">{{ item.title }}</a>
	</li>
	{% endfor %}
	</ul>
	</div>

Impact

The mobile navigation is functionally less complete than desktop navigation and hides the project links that are most useful from the Docs section.

Suggested fix

Render submenu items in the mobile menu as well, either as an expanded nested list under Docs or as an accessible collapsible section matching the desktop dropdown contents.