Add route heat colouring and detailed running analytics

tests/test_app.py

@@ -223,3 +223,36 @@ def test_real_cache_import_compatibility_without_persisting_user_data(tmp_path):
         for row in db.session.scalars(db.select(Activity)):
             assert row.distance_m >= 0 and row.duration_s >= 0
             assert row.visibility == "private"
+
+
+def test_refresh_preserves_sharing_and_converts_running_units(app):
+    from app.services import activity_from_fit
+
+    doc = {
+        "session": [{"sport": "running", "start_time": "2026-09-30T10:00:00Z"}],
+        "record": [
+            {
+                "timestamp": "2026-09-30T10:00:00Z",
+                "cadence": 80,
+                "fractional_cadence": 0.5,
+                "step_length": 1100,
+                "vertical_oscillation": 85,
+                "stance_time": 250,
+                "power": 300,
+            }
+        ],
+    }
+    with app.app_context():
+        activity = db.session.get(Activity, 1)
+        activity.title = "My chosen title"
+        activity.visibility = "friends"
+        result = activity_from_fit(1, "test:1", [doc], refresh=True)
+        db.session.commit()
+        assert result.id == 1
+        assert result.title == "My chosen title"
+        assert result.visibility == "friends"
+        assert result.samples[0]["cadence"] == 161
+        assert result.samples[0]["stride_length"] == 1.1
+        assert result.samples[0]["vertical_oscillation"] == 8.5
+        assert result.samples[0]["ground_contact"] == 250
+        assert result.samples[0]["power"] == 300