feat: routes page — deep-link to specific route, sport-colour tiles over real map, sort filter (distance/completions/last-completed), group custom vs auto-detected, taller map tiles

backend/app/api/routes.py

@@ -35,6 +35,7 @@ class RouteOut(BaseModel):
     auto_detected: Optional[bool]
     created_at: datetime
     activity_count: int = 0
+    last_activity_at: Optional[datetime] = None
 
     class Config:
         from_attributes = True
@@ -45,24 +46,33 @@ async def list_routes(
     db: AsyncSession = Depends(get_db),
     current_user: User = Depends(get_current_user),
 ):
-    # Fetch routes with activity counts in one query
-    count_subq = (
-        select(Activity.named_route_id, func.count(Activity.id).label("cnt"))
+    # Fetch routes with activity counts and last-completed time in one query
+    agg_subq = (
+        select(
+            Activity.named_route_id,
+            func.count(Activity.id).label("cnt"),
+            func.max(Activity.start_time).label("last_at"),
+        )
         .where(Activity.user_id == current_user.id, Activity.named_route_id.isnot(None))
         .group_by(Activity.named_route_id)
         .subquery()
     )
     result = await db.execute(
-        select(NamedRoute, func.coalesce(count_subq.c.cnt, 0).label("activity_count"))
-        .outerjoin(count_subq, NamedRoute.id == count_subq.c.named_route_id)
+        select(
+            NamedRoute,
+            func.coalesce(agg_subq.c.cnt, 0).label("activity_count"),
+            agg_subq.c.last_at.label("last_activity_at"),
+        )
+        .outerjoin(agg_subq, NamedRoute.id == agg_subq.c.named_route_id)
         .where(NamedRoute.user_id == current_user.id)
         .order_by(desc(NamedRoute.created_at))
     )
     rows = result.all()
     out = []
-    for route, cnt in rows:
+    for route, cnt, last_at in rows:
         d = {c.name: getattr(route, c.name) for c in route.__table__.columns}
         d["activity_count"] = cnt
+        d["last_activity_at"] = last_at
         out.append(RouteOut(**d))
     return out