feat: Add real-time visitor map with IP geolocation

- Add latitude/longitude columns to visitor_logs model
- Update visitor_service to fetch and store coordinates from ip-api.com
- Add /admin/map-data API endpoint for map visualization
- Create VisitorMap component using Leaflet/OpenStreetMap
- Integrate map into visitor-stats admin page
- 30-second auto-refresh with animation for new visitors
- Color-coded markers (red: active, blue: recent)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/app/api/visitor.py

@@ -332,3 +332,102 @@ def trigger_aggregation(
     if result:
         return {"status": "success", "date": date_str}
     return {"status": "no_data", "date": date_str}
+
+
+@router.get("/admin/map-data")
+def get_visitor_map_data(
+    minutes: int = 30,
+    db: Session = Depends(get_db),
+    current_user: User = Depends(get_current_admin_user),
+):
+    """
+    Get visitor locations for map display
+    Returns recent visitors with lat/lng coordinates
+    """
+    start_time = datetime.utcnow() - timedelta(minutes=minutes)
+
+    # Get recent visitors with coordinates
+    visitors = db.query(
+        VisitorLog.latitude,
+        VisitorLog.longitude,
+        VisitorLog.country,
+        VisitorLog.country_code,
+        VisitorLog.city,
+        VisitorLog.visited_at,
+        VisitorLog.page_path,
+        VisitorLog.device_type,
+    ).filter(
+        and_(
+            VisitorLog.visited_at >= start_time,
+            VisitorLog.latitude.isnot(None),
+            VisitorLog.longitude.isnot(None),
+        )
+    ).order_by(
+        desc(VisitorLog.visited_at)
+    ).limit(100).all()
+
+    # Group by unique location for clustering
+    locations = []
+    location_set = set()
+
+    for v in visitors:
+        # Round coordinates for grouping (roughly city-level)
+        lat_key = round(v.latitude, 2) if v.latitude else 0
+        lng_key = round(v.longitude, 2) if v.longitude else 0
+        location_key = f"{lat_key}:{lng_key}"
+
+        if location_key not in location_set:
+            location_set.add(location_key)
+            locations.append({
+                "lat": v.latitude,
+                "lng": v.longitude,
+                "country": v.country,
+                "country_code": v.country_code,
+                "city": v.city,
+                "last_visit": v.visited_at.isoformat() if v.visited_at else None,
+                "page": v.page_path,
+                "device": v.device_type,
+                "count": 1,  # Will be aggregated
+            })
+        else:
+            # Increment count for existing location
+            for loc in locations:
+                if round(loc["lat"], 2) == lat_key and round(loc["lng"], 2) == lng_key:
+                    loc["count"] += 1
+                    break
+
+    # Get recent activity for animation (last 5 minutes)
+    recent_start = datetime.utcnow() - timedelta(minutes=5)
+    recent_visitors = db.query(
+        VisitorLog.latitude,
+        VisitorLog.longitude,
+        VisitorLog.country,
+        VisitorLog.city,
+        VisitorLog.visited_at,
+    ).filter(
+        and_(
+            VisitorLog.visited_at >= recent_start,
+            VisitorLog.latitude.isnot(None),
+            VisitorLog.longitude.isnot(None),
+        )
+    ).order_by(
+        desc(VisitorLog.visited_at)
+    ).limit(20).all()
+
+    recent = [
+        {
+            "lat": v.latitude,
+            "lng": v.longitude,
+            "country": v.country,
+            "city": v.city,
+            "time": v.visited_at.isoformat() if v.visited_at else None,
+        }
+        for v in recent_visitors
+    ]
+
+    return {
+        "locations": locations,
+        "recent": recent,
+        "total_with_coords": len(visitors),
+        "minutes": minutes,
+    }