fix: BUG-22 include GPS-derived speeds in trip max (Pi + server)

server/modules/db.py

@@ -450,7 +450,8 @@ def compute_trips_for_device(device_id):
         seg_rows = rows[start_idx:end_idx + 1]
 
         distance = 0
-        speeds = []
+        speeds = []       # OBD speeds — used for avg
+        max_speeds = []   # OBD + GPS-derived — used for max
         for i in range(1, len(seg_rows)):
             d = haversine_km(seg_rows[i - 1][1], seg_rows[i - 1][2],
                              seg_rows[i][1], seg_rows[i][2])
@@ -458,6 +459,15 @@ def compute_trips_for_device(device_id):
             s = seg_rows[i][3]
             if s is not None and s > 0:
                 speeds.append(s)
+                max_speeds.append(s)
+            else:
+                # GPS-derived fallback for max (mirror the Pi): when OBD speed
+                # is missing, use the segment's GPS speed (>= 8 m, <= 220 km/h).
+                seconds = (seg_rows[i][0] - seg_rows[i - 1][0]).total_seconds()
+                if seconds > 0 and d * 1000 >= 8:
+                    seg_speed = d / seconds * 3600
+                    if seg_speed <= 220:
+                        max_speeds.append(seg_speed)
 
         duration_s = int((seg_rows[-1][0] - seg_rows[0][0]).total_seconds())
         if duration_s < 30 or distance < 0.05:
@@ -469,7 +479,7 @@ def compute_trips_for_device(device_id):
             "distance_km": round(distance, 3),
             "duration_s": duration_s,
             "avg_speed_kmh": round(sum(speeds) / len(speeds), 1) if speeds else None,
-            "max_speed_kmh": round(max(speeds), 1) if speeds else None,
+            "max_speed_kmh": round(max(max_speeds), 1) if max_speeds else None,
             "start_lat": seg_rows[0][1],
             "start_lon": seg_rows[0][2],
             "end_lat": seg_rows[-1][1],