feat: add per-trip use_gpx and autoconnect toggles

Adds two configurable toggles to the trip blueprint (Admin2 Trip tab):
- use_gpx: show/hide GPX tracks on all maps (default: enabled)
- autoconnect: draw connector lines between markers (default: enabled)

When use_gpx is off, GPX files are not fetched or rendered on any map
(home, map, trip, dailies). The stats panel in trip.html.twig still
reads GPX_URLS directly and is unaffected.

When autoconnect is off, buildJourneySegments suppresses all
auto-connectors; only entries with force_connect:true still draw a
line — making force_connect behaviour independent of both settings.

Also refactors the inline Promise.all in trip.html.twig to use the
shared renderGpxJourney utility (reducing duplication).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Vgmzx8VTTTmCskSpQtsLTr

themes/intotheeast/templates/dailies.html.twig

@@ -53,6 +53,8 @@
 <script>
 var FEED_ENTRIES = {{ map_entries|json_encode|raw }};
 var GPX_URLS     = {{ gpx_urls|json_encode|raw }};
+var USE_GPX      = {{ trip_page.header.use_gpx ?? true ? 'true' : 'false' }};
+var AUTOCONNECT  = {{ trip_page.header.autoconnect ?? true ? 'true' : 'false' }};
 
 var feedMap = new maplibregl.Map({
     container: 'feed-map',
@@ -87,7 +89,7 @@ feedMap.on('load', function () {
         feedMap.fitBounds(bounds, { padding: 60, maxZoom: 11 });
     }
 
-    Promise.all(GPX_URLS.map(function (url, idx) {
+    Promise.all((USE_GPX ? GPX_URLS : []).map(function (url) {
         return fetch(url)
             .then(function (r) { return r.text(); })
             .then(function (text) {
@@ -101,7 +103,7 @@ feedMap.on('load', function () {
             });
     })).then(function (allTrackpoints) {
         var validTrackpoints = allTrackpoints.filter(function (tp) { return tp.length > 0; });
-        var segments = MapUtils.buildJourneySegments(FEED_ENTRIES, validTrackpoints, 10);
+        var segments = MapUtils.buildJourneySegments(FEED_ENTRIES, validTrackpoints, 10, { autoconnect: AUTOCONNECT });
         MapUtils.addJourneySegments(feedMap, segments, 'feed-journey');
     });
 });