feat(comm): add frontend UI for Communication & Lead Layer

- Add CommInboxPage with conversation list and message view
- Add CommLeadsPage with pipeline visualization and lead scoring
- Add CommContactsPage with search and filtering
- Add navigation routes for /comm/inbox, /comm/leads, /comm/contacts
- Update Sidebar with Communication menu items
- Build fresh web-v2 dist

web-v2/src/components/layout/Sidebar.tsx

@@ -15,6 +15,9 @@ import {
   ChevronRight,
   Newspaper,
   Bot,
+  Inbox,
+  Target,
+  MessageCircle,
 } from 'lucide-react'
 import { cn } from '@/lib/utils'
 
@@ -22,6 +25,9 @@ const navItems = [
   { path: '/', label: 'Briefing', icon: Newspaper },
   { path: '/dashboard', label: 'Dashboard', icon: LayoutDashboard },
   { path: '/agents', label: 'Agents', icon: Bot },
+  { path: '/comm/inbox', label: 'Inbox', icon: Inbox },
+  { path: '/comm/leads', label: 'Leads', icon: Target },
+  { path: '/comm/contacts', label: 'Contacts', icon: MessageCircle },
   { path: '/crm', label: 'CRM', icon: Users },
   { path: '/sales', label: 'Sales', icon: TrendingUp },
   { path: '/finance', label: 'Finance', icon: Wallet },