fix: use page.collection() for tracker descending date order

page.children ignores the order.by/dir frontmatter config; page.collection()
applies it, so entries now render newest-first as intended.

Also wire Grav asset pipeline into base template (assets.css/js tags).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

themes/intotheeast/templates/tracker.html.twig

@@ -1,7 +1,7 @@
 {% extends 'default.html.twig' %}
 
 {% block content %}
-{% set entries = page.children %}
+{% set entries = page.collection() %}
 
 {# Collect GPS entries for mini-map #}
 {% set map_entries = [] %}