feat: dashboard restructure, integrations, settings, UI fixes

Dashboard:
- Split into components (kpi-cards, agent-table, missed-queue)
- Add collapsible AI panel on right (same pattern as Call Desk)
- Add tabs: Agent Performance | Missed Queue | Campaigns
- Date range filter in header

Integrations page:
- Ozonetel (connected), WhatsApp, Facebook, Google, Instagram, Website, Email
- Status badges, config details, webhook URL with copy button

Settings page:
- Employee table from workspaceMembers GraphQL query
- Name, email, roles, status, reset password action

Fixes:
- Fix CALLS_QUERY: callerNumber needs { primaryPhoneNumber }, recordingUrl → recording { primaryLinkUrl }
- Remove duplicate AI Assistant header
- Remove Follow-ups from CC agent sidebar (already in worklist tabs)
- Remove global search from TopBar (decorative, unused)
- Slim down TopBar height
- Fix search/table gap in worklist
- Add brand border to active nav item

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/components/call-desk/ai-chat-panel.tsx

@@ -99,12 +99,6 @@ export const AiChatPanel = ({ callerContext }: AiChatPanelProps) => {
 
     return (
         <div className="flex h-full flex-col">
-            {/* Header */}
-            <div className="flex items-center gap-2 pb-3">
-                <FontAwesomeIcon icon={faSparkles} className="size-4 text-fg-brand-primary" />
-                <h3 className="text-sm font-bold text-primary">AI Assistant</h3>
-            </div>
-
             {/* Caller context banner */}
             {callerContext?.leadName && (
                 <div className="mb-3 rounded-lg bg-brand-primary px-3 py-2">