feat(maps): add MapUtils shared map initialisation utility

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/test_map_utils.py

@@ -0,0 +1,19 @@
+# tests/test_map_utils.py
+
+
+def test_map_utils_js_is_served(client):
+    """map-utils.js is accessible as a static file."""
+    resp = client.get("/static/js/map-utils.js")
+    assert resp.status_code == 200
+    data = resp.data.decode()
+    assert "MapUtils" in data
+    assert "MapUtils.init" in data
+    assert "addTacticalOverlays" in data
+
+
+def test_map_utils_css_is_served(client):
+    """map-utils.css is accessible as a static file."""
+    resp = client.get("/static/css/core/map-utils.css")
+    assert resp.status_code == 200
+    data = resp.data.decode()
+    assert "map-hud-panel" in data