feat: call desk redesign — 2-panel layout, collapsible sidebar, inline AI, ringtone

- Collapsible sidebar with Jotai atom (icon-only mode, persisted to localStorage)
- 2-panel call desk: worklist (60%) + context panel (40%) with AI + Lead 360 tabs
- Inline AI call prep card — known lead summary or unknown caller script
- Active call card with compact Answer/Decline buttons
- Worklist panel with human-readable labels, priority badges, click-to-select
- Context panel auto-switches to Lead 360 when lead selected or call incoming
- Browser ringtone via Web Audio API on incoming calls
- Sonner + Untitled UI IconNotification for toast system
- apiClient pattern: centralized post/get/graphql with auto-toast on errors
- Remove duplicate avatar from top bar, hide floating widget on call desk
- Fix Link routing in collapsed sidebar (was using <a> causing full page reload)
- Fix GraphQL field names: adStatus→status, platformUrl needs subfield selection
- Silent mode for DataProvider queries to prevent toast spam

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

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

@@ -4,8 +4,6 @@ import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
 import { faPaperPlaneTop, faRobot, faSparkles, faUserHeadset } from '@fortawesome/pro-duotone-svg-icons';
 import { apiClient } from '@/lib/api-client';
 
-const API_URL = import.meta.env.VITE_API_URL ?? 'http://localhost:4100';
-
 type ChatMessage = {
     id: string;
     role: 'user' | 'assistant';
@@ -61,25 +59,11 @@ export const AiChatPanel = ({ callerContext }: AiChatPanelProps) => {
         setIsLoading(true);
 
         try {
-            const token = apiClient.getStoredToken();
-            const response = await fetch(`${API_URL}/api/ai/chat`, {
-                method: 'POST',
-                headers: {
-                    'Content-Type': 'application/json',
-                    ...(token ? { Authorization: `Bearer ${token}` } : {}),
-                },
-                body: JSON.stringify({
-                    message: messageText,
-                    context: callerContext,
-                }),
+            const data = await apiClient.post<{ reply: string; sources?: string[] }>('/api/ai/chat', {
+                message: messageText,
+                context: callerContext,
             });
 
-            if (!response.ok) {
-                throw new Error(`Request failed with status ${response.status}`);
-            }
-
-            const data = await response.json();
-
             const assistantMessage: ChatMessage = {
                 id: `assistant-${Date.now()}`,
                 role: 'assistant',