Fix: combined report generation formatting fixed and cleaned up. (i think its good now?)

backend/routers/project_locations.py

@@ -53,7 +53,9 @@ def _derive_period_type(dt: datetime) -> str:
 
 
 def _build_session_label(dt: datetime, location_name: str, period_type: str) -> str:
-    """Build a human-readable session label, e.g. 'NRL-1 — Sun 2/23 — Night'."""
+    """Build a human-readable session label, e.g. 'NRL-1 — Sun 2/23 — Night'.
+    Uses started_at date as-is; user can correct period_type in the wizard.
+    """
     day_abbr = dt.strftime("%a")
     date_str = f"{dt.month}/{dt.day}"
     period_str = {