feat: avg pace over moving time (fixes elapsed-based pace on paused activities); show mid-activity pauses on Body Battery band via active_spans

backend/app/workers/tasks.py

@@ -72,9 +72,14 @@ def _apply_garmin_summary(parsed: dict, summary: dict):
         parsed["moving_time_s"] = summary["moving"]
     if summary.get("elapsed") is not None:
         parsed["duration_s"] = summary["elapsed"]
-    dur = parsed.get("duration_s")
-    if parsed.get("distance_m") and dur:
-        parsed["avg_speed_ms"] = parsed["distance_m"] / dur
+    # Recompute average speed over moving (timer) time, not elapsed wall-clock —
+    # otherwise a long mid-activity pause (e.g. a meal stop on a ride) drags the
+    # displayed pace down across the whole break. Falls back to elapsed only when
+    # moving time is unavailable.
+    moving = parsed.get("moving_time_s")
+    denom = moving if (moving and moving > 0) else parsed.get("duration_s")
+    if parsed.get("distance_m") and denom:
+        parsed["avg_speed_ms"] = parsed["distance_m"] / denom
 
 
 @celery_app.task(bind=True, name="process_activity_file")
@@ -174,6 +179,7 @@ def process_activity_file(self, file_path: str, user_id: int, source_type: str,
             normalized_power=parsed.get("normalized_power"),
             avg_speed_ms=parsed.get("avg_speed_ms"),
             max_speed_ms=parsed.get("max_speed_ms"),
+            active_spans=parsed.get("active_spans"),
             avg_temperature_c=parsed.get("avg_temperature_c"),
             calories=parsed.get("calories"),
             training_stress_score=parsed.get("training_stress_score"),