Phase 4: history view with reverse geocoding

3-section layout (15/70/15) for browsing recorded events.
Reverse-geocodes coordinates via Photon API with Haversine
distance check and address caching. Also adds simulator GPS
polling fallback (Position.getInfo) since the simulator does
not fire location event callbacks.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

source/HistoryDelegate.mc

@@ -0,0 +1,29 @@
+import Toybox.Lang;
+import Toybox.WatchUi;
+
+// Input handler for HistoryView. UP/DOWN scroll through events,
+// BACK returns to the menu.
+class HistoryDelegate extends WatchUi.BehaviorDelegate {
+
+    private var _view as HistoryView;
+
+    function initialize(view as HistoryView) {
+        BehaviorDelegate.initialize();
+        _view = view;
+    }
+
+    function onNextPage() as Boolean {
+        _view.showNext();
+        return true;
+    }
+
+    function onPreviousPage() as Boolean {
+        _view.showPrev();
+        return true;
+    }
+
+    function onBack() as Boolean {
+        WatchUi.popView(WatchUi.SLIDE_RIGHT);
+        return true;
+    }
+}