feat(ui): replace palette with slate/navy monitoring dashboard theme

frontend/src/plugins/vuetify.js

@@ -11,35 +11,43 @@ export default createVuetify({
     defaultTheme: 'dark',
     themes: {
       dark: {
+        dark: true,
         colors: {
-          primary: '#1976D2',
-          secondary: '#424242',
-          accent: '#82B1FF',
-          error: '#FF5252',
-          info: '#2196F3',
-          success: '#4CAF50',
-          warning: '#FFC107',
+          background: '#0F172A',
+          surface:    '#1E293B',
+          primary:    '#60A5FA',
+          secondary:  '#94A3B8',
+          error:      '#F87171',
+          warning:    '#FBBF24',
+          success:    '#34D399',
+          info:       '#38BDF8',
         },
       },
       light: {
+        dark: false,
         colors: {
-          primary: '#1976D2',
-          secondary: '#424242',
-          accent: '#82B1FF',
-          error: '#FF5252',
-          info: '#2196F3',
-          success: '#4CAF50',
-          warning: '#FFC107',
+          background: '#F1F5F9',
+          surface:    '#FFFFFF',
+          primary:    '#2563EB',
+          secondary:  '#475569',
+          error:      '#EF4444',
+          warning:    '#F59E0B',
+          success:    '#10B981',
+          info:       '#0EA5E9',
         },
       },
     },
   },
   defaults: {
     VCard: {
-      elevation: 2,
+      elevation: 0,
+      border: true,
     },
     VBtn: {
       variant: 'flat',
     },
+    VChip: {
+      rounded: 'md',
+    },
   },
 })