chore(theme): astro 锁定 ~5.18.0（终审 Minor）+ docs: Plan 4 收官

Co-Authored-By: Claude Code <noreply@anthropic.com>

.deps_siteforge_v812/bleach/utils.py

@@ -0,0 +1,21 @@
+from collections import OrderedDict
+
+
+def _attr_key(attr):
+    """Returns appropriate key for sorting attribute names
+
+    Attribute names are a tuple of ``(namespace, name)`` where namespace can be
+    ``None`` or a string. These can't be compared in Python 3, so we conver the
+    ``None`` to an empty string.
+
+    """
+    key = (attr[0][0] or ""), attr[0][1]
+    return key
+
+
+def alphabetize_attributes(attrs):
+    """Takes a dict of attributes (or None) and returns them alphabetized"""
+    if not attrs:
+        return attrs
+
+    return OrderedDict([(k, v) for k, v in sorted(attrs.items(), key=_attr_key)])