feat: add trip/trips/stories templates, update nav and map/stats to use trip-relative paths

- Rename tracker.html.twig to dailies.html.twig; update dailies.md template key
- Fix map.html.twig and stats.html.twig: find dailies via page.parent().route
- Update base.html.twig nav to use config.site.active_trip for all hrefs
- Fix dailies.html.twig mini-map link to use page.parent().url/map
- Create trip.html.twig, trips.html.twig, stories.html.twig

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

themes/intotheeast/templates/trips.html.twig

@@ -0,0 +1,22 @@
+{% extends 'partials/base.html.twig' %}
+
+{% block content %}
+<h1>{{ page.title }}</h1>
+{% set trips = page.children.published() %}
+{% if trips|length == 0 %}
+<p>No trips yet.</p>
+{% else %}
+<ul class="trips-list">
+{% for trip in trips %}
+    <li>
+        <a href="{{ trip.url }}">
+            <strong>{{ trip.title }}</strong>
+            {% if trip.header.date_start %}
+            <span>{{ trip.header.date_start|date('d M Y') }}</span>
+            {% endif %}
+        </a>
+    </li>
+{% endfor %}
+</ul>
+{% endif %}
+{% endblock %}