feat: simulated odometer in trip replay + trip list (continuous across trips)

- Pi route_points: emit per-point odometer (raw OBD value or baseline+prior+within-trip distance)
- Pi get_trip_route: SELECT ODOMETER, compute prior-trips distance + baseline
- Pi list_trips: fallback now starts from baseline (was 0)
- Server get_trip_route: per-point odometer (raw or simulated) with haversine accumulation
- Server list_trips: odo_start/end from baseline + cumulative (was hardcoded None)
- history.js: Odometer line in replay scrubber below speed
- Both history templates: trip-replay-odometer element

modules/app_trip.py

@@ -216,7 +216,7 @@ def build_trip_summaries(raw_rows):
     return trips
 
 
-def route_points(raw_rows, max_points=2000):
+def route_points(raw_rows, max_points=2000, odometer_baseline=0.0, prior_km=0.0):
     rows = normalize_tracking_rows(raw_rows)
     filtered_rows = []
     for row in rows:
@@ -226,6 +226,7 @@ def route_points(raw_rows, max_points=2000):
                 continue
         filtered_rows.append(row)
     rows = filtered_rows
+    cumulative_km = 0.0
     for index, row in enumerate(rows):
         row["speed_source"] = "obd" if row["speed"] > 0 else "gps"
         if row["speed"] <= 0 and index:
@@ -235,6 +236,17 @@ def route_points(raw_rows, max_points=2000):
                 if distance_km * 1000 >= GPS_MOTION_METERS
                 else 0
             )
+        if index:
+            segment_km, _ = _segment(row, rows[index - 1])
+            cumulative_km += segment_km
+        # Odometer per point: use the raw OBD value when the vehicle reports
+        # one; otherwise simulate it as baseline + prior trips + within-trip
+        # distance (continuous across trips, matching get_overview_stats).
+        raw_odometer = row.get("odometer")
+        if raw_odometer is not None and raw_odometer > 0:
+            row["odometer"] = raw_odometer
+        else:
+            row["odometer"] = odometer_baseline + prior_km + cumulative_km
     if len(rows) <= max_points:
         selected = rows
     else:
@@ -250,4 +262,5 @@ def route_points(raw_rows, max_points=2000):
         "longitude": row["longitude"],
         "speed": round(row["speed"], 1),
         "speed_source": row["speed_source"],
+        "odometer": round(row["odometer"], 1) if row["odometer"] is not None else None,
     } for row in selected]