fix: correct CampaignsView, analysis.py IPv4 split, entities date filter

- CampaignsView: update ClusterData interface to match real API response
  (severity/unique_ips/score instead of threat_level/total_ips/confidence_range)
  Fix fetch to use data.items, rewrite ClusterCard and BehavioralTab
  Remove unused getClassificationColor and THREAT_ORDER constants
- analysis.py: fix IPv4Address object has no attribute 'split' on line 322
  Add str() conversion before calling .split('.')
- entities.py: fix Date vs DateTime comparison — log_date is a Date column,
  comparing against now()-INTERVAL HOUR caused yesterday's entries to be excluded
  Use toDate(now() - INTERVAL X HOUR) for correct Date-level comparison

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

frontend/src/components/DetectionsList.tsx

@@ -1,5 +1,5 @@
 import { useState } from 'react';
-import { useSearchParams } from 'react-router-dom';
+import { useNavigate, useSearchParams } from 'react-router-dom';
 import { useDetections } from '../hooks/useDetections';
 
 type SortField = 'detected_at' | 'threat_level' | 'anomaly_score' | 'src_ip' | 'country_code' | 'asn_number' | 'host' | 'hits' | 'hit_velocity';
@@ -13,6 +13,7 @@ interface ColumnConfig {
 }
 
 export function DetectionsList() {
+  const navigate = useNavigate();
   const [searchParams, setSearchParams] = useSearchParams();
 
   const page = parseInt(searchParams.get('page') || '1');
@@ -311,13 +312,13 @@ export function DetectionsList() {
           </thead>
           <tbody className="divide-y divide-background-card">
             {processedData.items.map((detection) => (
-              <tr
-                key={`${detection.src_ip}-${detection.detected_at}-${groupByIP ? 'grouped' : 'individual'}`}
-                className="hover:bg-background-card/50 transition-colors cursor-pointer"
-                onClick={() => {
-                  window.location.href = `/detections/ip/${encodeURIComponent(detection.src_ip)}`;
-                }}
-              >
+                <tr
+                  key={`${detection.src_ip}-${detection.detected_at}-${groupByIP ? 'grouped' : 'individual'}`}
+                  className="hover:bg-background-card/50 transition-colors cursor-pointer"
+                  onClick={() => {
+                    navigate(`/detections/ip/${encodeURIComponent(detection.src_ip)}`);
+                  }}
+                >
                 {columns.filter(col => col.visible).map(col => {
                   if (col.key === 'ip_ja4') {
                     const detectionAny = detection as any;