fix markdown extension loading

pyproject.toml

@@ -51,7 +51,7 @@ reportUnusedCallResult = false
 reportCallInDefaultInitializer = false
 enableTypeIgnoreComments = true
 reportIgnoreCommentWithoutRule = false
-allowedUntypedLibraries = ["frontmatter", "pygments"]
+allowedUntypedLibraries = ["frontmatter", "pygments", "pymdownx"]
 
 [tool.ruff]
 line-length = 70

src/zona/markdown.py

@@ -1,11 +1,10 @@
-from markdown import Markdown
+from collections.abc import Sequence
 from rich import print
+from markdown import Markdown
 from typing import Any, override
 from pathlib import Path
-from marko.inline import Link, Image
-from marko.block import FencedCode
-from marko.html_renderer import HTMLRenderer
-from marko.parser import Parser
+
+from pygments.formatters.html import HtmlFormatter
 from zona.config import ZonaConfig
 from zona.layout import Layout
 
@@ -14,14 +13,11 @@ from markdown.extensions.codehilite import CodeHiliteExtension
 from markdown.extensions.extra import ExtraExtension
 from markdown.extensions.smarty import SmartyExtension
 from markdown.extensions.sane_lists import SaneListExtension
+from markdown.extensions.md_in_html import MarkdownInHtmlExtension
 from pymdownx.inlinehilite import InlineHiliteExtension
+from pymdownx.escapeall import EscapeAllExtension
 import xml.etree.ElementTree as etree
 
-
-from pygments import highlight
-from pygments.lexers import get_lexer_by_name, TextLexer
-from pygments.formatters import HtmlFormatter
-
 from zona import util
 from zona.models import Item
 from zona.log import get_logger
@@ -137,25 +133,26 @@ def md_to_html(
     layout: Layout | None = None,
     item_map: dict[Path, Item] | None = None,
 ) -> str:
+    extensions: Sequence[Any] = [
+        ExtraExtension(),
+        SmartyExtension(),
+        "pymdownx.tilde",
+        "pymdownx.caret",
+        "pymdownx.smartsymbols",
+        InlineHiliteExtension(css_class="codehilite"),
+        SaneListExtension(),
+        MarkdownInHtmlExtension(),
+        EscapeAllExtension(hardbreak=True),
+    ]
     if config:
-        md = Markdown(
-            extensions=[
-                CodeHiliteExtension(
-                    linenums=False,
-                    noclasses=False,
-                    pygments_style=config.markdown.syntax_highlighting.theme,
-                ),
-                ExtraExtension(),
-                SmartyExtension(),
-                "pymdownx.tilde",
-                "pymdownx.caret",
-                "pymdownx.smartsymbols",
-                InlineHiliteExtension(css_class="codehilite"),
-                SaneListExtension(),
-            ]
+        extensions.append(
+            CodeHiliteExtension(
+                linenums=False,
+                noclasses=False,
+                pygments_style=config.markdown.syntax_highlighting.theme,
+            )
         )
-    else:
-        md = Markdown()
+    md = Markdown(extensions=extensions)
     if resolve_links:
         if source is None or layout is None or item_map is None:
             raise TypeError(