refactor: share falsey-safe html rendering

scripts/html_rendering.py

@@ -0,0 +1,14 @@
+#!/usr/bin/env python3
+"""Shared HTML rendering helpers for static report generators."""
+
+import html
+from typing import Any
+
+
+SCRIPT_INTERFACE = "internal-module"
+SCRIPT_INTERFACE_REASON = "Used by report renderers to escape HTML while preserving meaningful falsey values."
+
+
+def html_text(value: Any) -> str:
+    """Escape text for HTML without dropping 0 or False values."""
+    return html.escape("" if value is None else str(value), quote=True)