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/tailwind.config.js

@@ -7,34 +7,34 @@ export default {
   theme: {
     extend: {
       colors: {
-        // Thème sombre Security Dashboard
+        // Backgrounds — CSS-variable driven for dark/light theming
         background: {
-          DEFAULT: '#0F172A',    // Slate 900
-          secondary: '#1E293B',  // Slate 800
-          card: '#334155',       // Slate 700
+          DEFAULT:   'rgb(var(--color-bg)           / <alpha-value>)',
+          secondary: 'rgb(var(--color-bg-secondary)  / <alpha-value>)',
+          card:      'rgb(var(--color-bg-card)       / <alpha-value>)',
         },
         text: {
-          primary: '#F8FAFC',    // Slate 50
-          secondary: '#94A3B8',  // Slate 400
-          disabled: '#64748B',   // Slate 500
+          primary:   'rgb(var(--color-text-primary)  / <alpha-value>)',
+          secondary: 'rgb(var(--color-text-secondary)/ <alpha-value>)',
+          disabled:  'rgb(var(--color-text-disabled) / <alpha-value>)',
         },
-        // Menaces
+        // Threat levels — vivid, same in both themes
         threat: {
-          critical: '#EF4444',   // Red 500
+          critical:    '#EF4444',
           critical_bg: '#7F1D1D',
-          high: '#F97316',       // Orange 500
-          high_bg: '#7C2D12',
-          medium: '#EAB308',     // Yellow 500
-          medium_bg: '#713F12',
-          low: '#22C55E',        // Green 500
-          low_bg: '#14532D',
+          high:        '#F97316',
+          high_bg:     '#7C2D12',
+          medium:      '#EAB308',
+          medium_bg:   '#713F12',
+          low:         '#22C55E',
+          low_bg:      '#14532D',
         },
         // Accents
         accent: {
-          primary: '#3B82F6',    // Blue 500
-          success: '#10B981',    // Emerald 500
-        }
-      }
+          primary: '#3B82F6',
+          success: '#10B981',
+        },
+      },
     },
   },
   plugins: [],