refactor: UI improvements and code cleanup

Frontend:
- DetectionsList: Simplify columns, improve truncation and display for IPs, hosts, bot info
- IncidentsView: Replace metric cards with compact stat cards (unique IPs, known bots, ML anomalies, threat levels)
- InvestigationView: Add section navigation anchors, reorganize layout with proper IDs
- ThreatIntelView: Add navigation links to investigation pages, add comment column, improve table layout

Backend:
- Various route and model adjustments
- Configuration updates

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

backend/routes/fingerprints.py

@@ -10,7 +10,6 @@ Objectifs:
     qui usurpent des UA de navigateurs légitimes
 """
 from fastapi import APIRouter, HTTPException, Query
-from typing import Optional
 import re
 
 from ..database import db