Update Jinja2 environment to include Flask's default globals and filters

extensions.py

@@ -10,8 +10,15 @@ environment = Environment(
     loader=FileSystemLoader("templates"),
     autoescape=select_autoescape(("html", "jinja2"))
 )
-environment.globals['url_for'] = url_for
 
 
 def init_app(app):
     htmx.init_app(app)
+    
+    # Add all Flask's default Jinja2 globals and filters
+    environment.globals.update(
+        app.jinja_env.globals
+    )
+    environment.filters.update(
+        app.jinja_env.filters
+    )