Platform-wide UX fixes: assignment dialog, invalidation, settings, dashboard

1. Assignment dialog overhaul: replace raw UUID inputs with searchable
   juror Combobox (shows name, email, capacity) and multi-select project
   checklist with bulk assignment support

2. Query invalidation sweep: fix missing invalidations in
   assignment-preview-sheet (roundAssignment.execute) and
   filtering-dashboard (filtering.finalizeResults) so data refreshes
   without page reload

3. Rename Submissions tab to Document Windows with descriptive
   header explaining upload window configuration

4. Connect 6 disconnected settings: storage_provider, local_storage_path,
   avatar_max_size_mb, allowed_image_types, whatsapp_enabled,
   whatsapp_provider - all now accessible in Settings UI

5. Admin dashboard redesign: branded Editorial Command Center with
   Dark Blue gradient header, colored border-l-4 stat cards, staggered
   animations, 2-column layout, action-required panel, activity timeline

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/settings/settings-content.tsx

@@ -25,6 +25,7 @@ import {
   ShieldAlert,
   Globe,
   Webhook,
+  MessageCircle,
 } from 'lucide-react'
 import Link from 'next/link'
 import { AnimatedCard } from '@/components/shared/animated-container'
@@ -103,8 +104,12 @@ export function SettingsContent({ initialSettings, isSuperAdmin = true }: Settin
   ])
 
   const storageSettings = getSettingsByKeys([
+    'storage_provider',
+    'local_storage_path',
     'max_file_size_mb',
+    'avatar_max_size_mb',
     'allowed_file_types',
+    'allowed_image_types',
   ])
 
   const securitySettings = getSettingsByKeys([
@@ -147,6 +152,11 @@ export function SettingsContent({ initialSettings, isSuperAdmin = true }: Settin
     'anomaly_off_hours_end',
   ])
 
+  const whatsappSettings = getSettingsByKeys([
+    'whatsapp_enabled',
+    'whatsapp_provider',
+  ])
+
   const localizationSettings = getSettingsByKeys([
     'localization_enabled_locales',
     'localization_default_locale',
@@ -183,6 +193,12 @@ export function SettingsContent({ initialSettings, isSuperAdmin = true }: Settin
           <Newspaper className="h-4 w-4" />
           Digest
         </TabsTrigger>
+        {isSuperAdmin && (
+          <TabsTrigger value="whatsapp" className="gap-2 shrink-0">
+            <MessageCircle className="h-4 w-4" />
+            WhatsApp
+          </TabsTrigger>
+        )}
         {isSuperAdmin && (
           <TabsTrigger value="security" className="gap-2 shrink-0">
             <Shield className="h-4 w-4" />
@@ -259,6 +275,12 @@ export function SettingsContent({ initialSettings, isSuperAdmin = true }: Settin
                 <Newspaper className="h-4 w-4" />
                 Digest
               </TabsTrigger>
+              {isSuperAdmin && (
+                <TabsTrigger value="whatsapp" className="justify-start gap-2 w-full px-3 py-2 h-auto data-[state=active]:bg-muted">
+                  <MessageCircle className="h-4 w-4" />
+                  WhatsApp
+                </TabsTrigger>
+              )}
             </TabsList>
           </div>
           <div>
@@ -502,6 +524,24 @@ export function SettingsContent({ initialSettings, isSuperAdmin = true }: Settin
         </Card>
         </AnimatedCard>
       </TabsContent>
+
+      {isSuperAdmin && (
+        <TabsContent value="whatsapp" className="space-y-6">
+          <AnimatedCard>
+          <Card>
+            <CardHeader>
+              <CardTitle>WhatsApp Notifications</CardTitle>
+              <CardDescription>
+                Configure WhatsApp messaging for notifications
+              </CardDescription>
+            </CardHeader>
+            <CardContent>
+              <WhatsAppSettingsSection settings={whatsappSettings} />
+            </CardContent>
+          </Card>
+          </AnimatedCard>
+        </TabsContent>
+      )}
       </div>{/* end content area */}
       </div>{/* end lg:flex */}
     </Tabs>
@@ -794,6 +834,29 @@ function AuditSettingsSection({ settings }: { settings: Record<string, string> }
   )
 }
 
+function WhatsAppSettingsSection({ settings }: { settings: Record<string, string> }) {
+  return (
+    <div className="space-y-4">
+      <SettingToggle
+        label="Enable WhatsApp Notifications"
+        description="Send notifications via WhatsApp in addition to email"
+        settingKey="whatsapp_enabled"
+        value={settings.whatsapp_enabled || 'false'}
+      />
+      <SettingSelect
+        label="WhatsApp Provider"
+        description="Select the API provider for sending WhatsApp messages"
+        settingKey="whatsapp_provider"
+        value={settings.whatsapp_provider || 'META'}
+        options={[
+          { value: 'META', label: 'Meta (WhatsApp Business API)' },
+          { value: 'TWILIO', label: 'Twilio' },
+        ]}
+      />
+    </div>
+  )
+}
+
 function LocalizationSettingsSection({ settings }: { settings: Record<string, string> }) {
   const mutation = useSettingsMutation()
   const enabledLocales = (settings.localization_enabled_locales || 'en').split(',')