[Code scan] Insert ICP footer into themes without a footer element

[njzjz]

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

Problem

The extension advertises that it adds the ICP number to the footer, but the generic injection path only searches for a literal </footer> tag. Themes such as Alabaster render the footer as a <div class="footer">...</div> instead, so no ICP number is inserted.

Code references:

deepmodeling_sphinx/README.md

Lines 8 to 13 in 156679f

	## Features
	- Add the DeepModeling banner
	- Add the ICP number to the footer
	- Minify HTML, Javascript, and CSS files
	- Supports dark mode for both the banner and the RTD theme

deepmodeling_sphinx/deepmodeling_sphinx/inject.py

Lines 85 to 113 in 156679f

	def insert_icp(app, pagename, templatename, context, doctree):
	if not app.config.enable_deepmodeling:
	return
	if app.config.html_theme == "sphinx_book_theme":
	# sphinx_book_theme has provided the option, so there is no need to hack
	return
	if not hasattr(app.builder.templates.render, "_deepmodeling_icp_patched"):
	old_render = app.builder.templates.render
	def render(self, template, render_context):
	content = old_render(template, render_context)
	comment_begin = r"<!--deepmodeling icp begin-->"
	comment_end = r"<!--deepmodeling icp end-->"
	if comment_begin in content:
	return content
	footer = content.lower().rfind("</footer>")
	icp_footer = (
	'<p><a href="https://beian.miit.gov.cn" target="_blank">%s</a></p>'
	% icp_no
	)
	if footer != -1:
	content = (
	content[:footer]
	+ comment_begin
	+ icp_footer
	+ comment_end
	+ content[footer:]
	)
	return content

deepmodeling_sphinx/deepmodeling_sphinx/inject.py

Lines 194 to 205 in 156679f

	def sphinx_book_theme(app, config):
	"""Set configurations for sphinx_book_theme."""
	if not config.enable_deepmodeling:
	return
	if config.html_theme != "sphinx_book_theme":
	return
	icp_footer = (
	'<p><a href="https://beian.miit.gov.cn" target="_blank">%s</a></p>' % icp_no
	)
	config.html_theme_options["extra_footer"] = (
	config.html_theme_options.get("extra_footer", "") + icp_footer
	)

Reproduction

Build a minimal Sphinx project with html_theme = "alabaster" and extensions = ["deepmodeling_sphinx"]. The generated HTML has <div class=footer>..., but no 京ICP备20010051号-8 text is inserted.

Impact

Projects using supported Sphinx themes that do not emit a semantic <footer> element miss a documented compliance/footer feature.

Suggested fix

Prefer theme-supported footer APIs where available, or support common footer containers in addition to the literal </footer> tag. A parser-based insertion path would also avoid relying on brittle string matching.