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/core/Handler.js

@@ -0,0 +1,57 @@
+import {Class} from './Class';
+
+/*
+	L.Handler is a base class for handler classes that are used internally to inject
+	interaction features like dragging to classes like Map and Marker.
+*/
+
+// @class Handler
+// @aka L.Handler
+// Abstract class for map interaction handlers
+
+export var Handler = Class.extend({
+	initialize: function (map) {
+		this._map = map;
+	},
+
+	// @method enable(): this
+	// Enables the handler
+	enable: function () {
+		if (this._enabled) { return this; }
+
+		this._enabled = true;
+		this.addHooks();
+		return this;
+	},
+
+	// @method disable(): this
+	// Disables the handler
+	disable: function () {
+		if (!this._enabled) { return this; }
+
+		this._enabled = false;
+		this.removeHooks();
+		return this;
+	},
+
+	// @method enabled(): Boolean
+	// Returns `true` if the handler is enabled
+	enabled: function () {
+		return !!this._enabled;
+	}
+
+	// @section Extension methods
+	// Classes inheriting from `Handler` must implement the two following methods:
+	// @method addHooks()
+	// Called when the handler is enabled, should add event hooks.
+	// @method removeHooks()
+	// Called when the handler is disabled, should remove the event hooks added previously.
+});
+
+// @section There is static function which can be called without instantiating L.Handler:
+// @function addTo(map: Map, name: String): this
+// Adds a new Handler to the given map with the given name.
+Handler.addTo = function (map, name) {
+	map.addHandler(name, this);
+	return this;
+};