Fix European trip return heuristic for weekend location tracking

Adjust European short trip heuristic from >3 days to >1 day to correctly
detect when user has returned home from European trips. This fixes the
April 29-30, 2023 case where the location incorrectly showed "Sankt Georg, Hamburg"
instead of "Bristol" when the user was free (no events scheduled) after
the foss-north trip ended on April 27.

The previous logic required more than 3 days to pass before assuming
return home from European countries, but for short European trips by
rail/ferry, users typically return within 1-2 days.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

node_modules/leaflet/src/geo/crs/CRS.EPSG3395.js

@@ -0,0 +1,20 @@
+import {Earth} from './CRS.Earth';
+import {Mercator} from '../projection/Projection.Mercator';
+import {toTransformation} from '../../geometry/Transformation';
+import * as Util from '../../core/Util';
+
+/*
+ * @namespace CRS
+ * @crs L.CRS.EPSG3395
+ *
+ * Rarely used by some commercial tile providers. Uses Elliptical Mercator projection.
+ */
+export var EPSG3395 = Util.extend({}, Earth, {
+	code: 'EPSG:3395',
+	projection: Mercator,
+
+	transformation: (function () {
+		var scale = 0.5 / (Math.PI * Mercator.R);
+		return toTransformation(scale, 0.5, -scale, 0.5);
+	}())
+});