Add Impressum and QR code management templates

- Created a new Impressum page with legal information and contact details.
- Developed admin link page for linking QR codes to events with form functionality.
- Implemented QR code dashboard for managing QR code sets, including creation and quick actions.
- Added detailed view for QR code sets, allowing addition of QR codes and management actions.
- Introduced static file serving for favicon and related images.
- Established views for static content pages (about, contact, privacy, terms).
- Implemented translation management scripts for compiling and updating translations.

app/views/leaderboard.py

@@ -9,7 +9,7 @@ from sqlalchemy import func, desc
 from datetime import datetime, timedelta
 
 from ..db import SessionLocal
-from ..models import Team, TeamMembership, QRTicket
+from ..models import Team, TeamMembership, QRCode
 from ..templates_config import templates
 
 router = APIRouter()
@@ -45,20 +45,17 @@ async def show_leaderboard(
     query = db.query(
         Team.id,
         Team.name,
-        func.coalesce(func.sum(QRTicket.points), 0).label('total_points')
+        func.coalesce(func.sum(QRCode.points), 0).label('total_points')
     ).join(
-        QRTicket,
-        QRTicket.redeemed_at_team == Team.id,
+        QRCode,
+        QRCode.redeemed_at_team == Team.id,
         isouter=True
     )
     
     # Apply time filter if needed
     if cutoff_date:
-        # Note: This assumes QRTicket has a created_at or similar timestamp field
-        # If not, you would need to add one to track when points were added
-        # For now, this is a placeholder that assumes all tickets are from "now"
-        # query = query.filter(QRTicket.created_at >= cutoff_date)
-        pass
+        # Filter by redeemed_at timestamp if available
+        query = query.filter(QRCode.redeemed_at >= cutoff_date)
     
     # Group and order
     teams_ranking = query.group_by(Team.id).order_by(desc('total_points')).all()