WIP: checkpoint geocaching before main integration

modules/ui_shared/include/ui/screens/geocaching/geocaching_page_shell.h

@@ -0,0 +1,11 @@
+#pragma once
+#include "lvgl.h"
+#include "ui/page/page_host.h"
+#include "ui_presentation/geocaching/geocaching_source.h"
+
+namespace geocaching::ui::shell
+{
+void bind(::ui::geocaching::Source* source);
+void enter(void* user_data, lv_obj_t* parent);
+void exit(void* user_data, lv_obj_t* parent);
+} // namespace geocaching::ui::shell

modules/ui_shared/include/ui/screens/gps/gps_page_runtime.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include "ui/screens/gps/gps_page_shell.h"
+#include "ui_presentation/map/map_overlay_snapshot.h"
 
 #include <cstdint>
 
@@ -8,6 +9,16 @@ namespace gps::ui::runtime
 {
 
 bool is_available();
+struct MapTarget
+{
+    int32_t latitude_e7 = 0, longitude_e7 = 0;
+    char name[97]{};
+    void* overlay_context = nullptr;
+    void (*append_overlays)(void*, ::ui::map::MapOverlaySnapshot&) = nullptr;
+    void (*select_overlay)(void*, uint32_t) = nullptr;
+};
+// Target is borrowed until exit; caller owns its lifetime.
+bool enter_target(const shell::Host* host, lv_obj_t* parent, const MapTarget& target);
 void enter(const shell::Host* host,
            lv_obj_t* parent,
            shell::Projection projection = shell::Projection::Map);

modules/ui_shared/include/ui/widgets/map/map_viewport.h

@@ -84,6 +84,7 @@ enum class GesturePhase : uint8_t
     DragUpdate,
     DragEnd,
     Cancel,
+    Tapped,
 };
 
 struct GestureEvent