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/DetailsView.tsx

@@ -106,18 +106,21 @@ export function DetailsView() {
         </div>
       </div>
 
-      {/* Insights */}
-      {data.insights.length > 0 && (
-        <div className="space-y-2">
-          <h2 className="text-lg font-semibold text-text-primary">Insights</h2>
-          {data.insights.map((insight, i) => (
-            <InsightCard key={i} insight={insight} />
-          ))}
-        </div>
-      )}
+      {/* Insights + Variabilité côte à côte */}
+      <div className="grid grid-cols-3 gap-6 items-start">
+        {data.insights.length > 0 && (
+          <div className="space-y-2">
+            <h2 className="text-lg font-semibold text-text-primary">Insights</h2>
+            {data.insights.map((insight, i) => (
+              <InsightCard key={i} insight={insight} />
+            ))}
+          </div>
+        )}
 
-      {/* Variabilité */}
-      <VariabilityPanel attributes={data.attributes} />
+        <div className={data.insights.length > 0 ? 'col-span-2' : 'col-span-3'}>
+          <VariabilityPanel attributes={data.attributes} />
+        </div>
+      </div>
 
       {/* Bouton retour */}
       <div className="flex justify-center">