Additional bugfixes

backend/app/core/executor.py

@@ -23,5 +23,5 @@ def get_executor() -> ThreadPoolExecutor:
 def shutdown_executor() -> None:
     global _executor
     if _executor is not None:
-        _executor.shutdown(wait=False)
+        _executor.shutdown(wait=True)
         _executor = None

backend/app/core/export.py

@@ -2,6 +2,7 @@ from __future__ import annotations
 
 import io
 
+import openpyxl
 from reportlab.lib import colors
 from reportlab.lib.pagesizes import A4, landscape
 from reportlab.lib.styles import getSampleStyleSheet
@@ -57,6 +58,19 @@ def _pdf_table(rows: list[dict]) -> Table:
     return t
 
 
+def to_xlsx_bytes(rows: list[dict]) -> bytes:
+    """Serialise *rows* to a single-sheet XLSX workbook and return the raw bytes."""
+    wb = openpyxl.Workbook()
+    ws = wb.active
+    if rows:
+        ws.append(list(rows[0].keys()))
+        for row in rows:
+            ws.append([str(v) if v is not None else "" for v in row.values()])
+    buf = io.BytesIO()
+    wb.save(buf)
+    return buf.getvalue()
+
+
 def to_pdf_bytes(rows: list[dict], title: str, subtitle: str = "") -> bytes:
     """Serialise *rows* to a single-sheet PDF and return the raw bytes."""
     buf = io.BytesIO()

backend/app/routers/wwi.py

@@ -14,7 +14,7 @@ from sqlalchemy.orm import sessionmaker, Session
 from app.core.audit import ExportRecord, append_audit, current_span_context
 from app.core.config import settings
 from app.core.executor import get_executor
-from app.core.export import to_pdf_bytes
+from app.core.export import to_pdf_bytes, to_xlsx_bytes
 from app.core.security import FrontendPrincipal, require_frontend_principal
 from app.domain.wwi import analytics
 
@@ -379,6 +379,24 @@ async def export_wwi_business_events(
     data = await asyncio.get_running_loop().run_in_executor(
         get_executor(), lambda: analytics.get_business_events(pg_factory, limit=limit)
     )
+
+    if format == "xlsx":
+        today = datetime.now(timezone.utc).strftime("%Y%m%d")
+        filename = f"wwi_business_events_{today}.xlsx"
+        trace_id, span_id = current_span_context()
+
+        def _build_xlsx():
+            content = to_xlsx_bytes(data)
+            _record_export(pg_factory, "wwi", "business-events", "xlsx", filters,
+                           len(data), len(content), actor_id, trace_id, span_id)
+            return content
+
+        content = await asyncio.get_running_loop().run_in_executor(get_executor(), _build_xlsx)
+        return Response(
+            content=content, media_type=_XLSX_MEDIA,
+            headers={"Content-Disposition": f'attachment; filename="{filename}"'},
+        )
+
     return await asyncio.get_running_loop().run_in_executor(
         get_executor(),
         lambda: _make_pdf(data, "wwi_business_events",