feat(analytics): lower maturity window to 2 days and reword about page

reaction_board/web/queries.py

@@ -738,7 +738,7 @@ class DashboardQueries:
             ]
 
             if sort in duration_sorts:
-                _, latest_end = day_bounds(latest)
+                latest_start, _ = day_bounds(latest)
                 minimum_seconds = max(0, int(analytics.min_duration_seconds))
                 min_view = max(0, int(analytics.min_view_for_efficiency))
                 items = [
@@ -747,7 +747,7 @@ class DashboardQueries:
                     and int(item["duration"] or 0) >= minimum_seconds
                     and int((item["metrics"] or {}).get("view", 0)) >= min_view
                     and is_mature(
-                        item["pubdate"], latest_end, analytics.maturity_days
+                        item["pubdate"], latest_start, analytics.maturity_days
                     )
                 ]
             if sort == "interaction":
@@ -1396,10 +1396,24 @@ class DashboardQueries:
             preview_row = conn.execute(
                 "SELECT v FROM kv WHERE k = 'preview:seeded'"
             ).fetchone()
+            fans_start_date = None
+            track_fans = [
+                int(mid) for mid in cfg.track_fans if not isinstance(mid, bool)
+            ]
+            if track_fans:
+                placeholders = ",".join("?" for _ in track_fans)
+                row = conn.execute(
+                    f"SELECT MIN(stat_date) AS d FROM up_stat "
+                    f"WHERE ok = 1 AND mid IN ({placeholders})",
+                    track_fans,
+                ).fetchone()
+                fans_start_date = None if row is None else row["d"]
             return {
                 "data_date": latest,
                 "snapshot_days": self._snapshot_days(conn),
                 "snapshot_first_date": first_date,
+                "fans_start_date": fans_start_date,
+                "track_fans": track_fans,
                 "schema_version": int(self.db.schema_version or 0),
                 "preview": bool(preview_row and str(preview_row["v"]) == "1"),
                 "counts": counts,