Fix Jinja2 _component prerender default value

The Jinja wrapper used prerender="" as default, but str_to_bool("")
raises ValueError. Fix by matching the Django tag behavior — default to
str(REACTPY_PRERENDER) when no explicit prerender value is provided.

Author: User

src/reactpy_django/templatetags/jinja.py

@@ -112,6 +112,10 @@ def _component(
         Returns:
             Rendered HTML string.
         """
+        from reactpy_django.config import REACTPY_PRERENDER as _REACTPY_PRERENDER
+
+        if not prerender:
+            prerender = str(_REACTPY_PRERENDER)
         request = jinja_context.parent.get("request")
         if request is None:
             _logger.error(