feat: worklist sorting, contextual disposition, context panel redesign, notifications

- Worklist default sort descending (newest first), sortable column headers (PRIORITY, PATIENT, SLA) via React Aria
- Contextual disposition: auto-selects based on in-call actions (appointment → APPOINTMENT_BOOKED, enquiry → INFO_PROVIDED, transfer → FOLLOW_UP_SCHEDULED)
- Context panel redesign: collapsible AI Insight, Upcoming (appointments + follow-ups + linked patient), Recent (calls + activities) sections; auto-collapse on AI chat start
- Appointments added to DataProvider with APPOINTMENTS_QUERY, Appointment type, transform
- Notification bell for admin/supervisor: performance alerts (idle time, NPS, conversion thresholds) with toast on load + bell dropdown with dismiss; demo alerts as fallback
- Slideout z-index fix: added z-50 to slideout ModalOverlay matching modal component

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

src/components/call-desk/disposition-modal.tsx

@@ -1,4 +1,4 @@
-import { useState } from 'react';
+import { useState, useRef } from 'react';
 import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
 import { faPhoneHangup } from '@fortawesome/pro-duotone-svg-icons';
 import { Dialog, Modal, ModalOverlay } from '@/components/application/modals/modal';
@@ -60,19 +60,28 @@ type DispositionModalProps = {
     isOpen: boolean;
     callerName: string;
     callerDisconnected: boolean;
+    defaultDisposition?: CallDisposition | null;
     onSubmit: (disposition: CallDisposition, notes: string) => void;
     onDismiss?: () => void;
 };
 
-export const DispositionModal = ({ isOpen, callerName, callerDisconnected, onSubmit, onDismiss }: DispositionModalProps) => {
+export const DispositionModal = ({ isOpen, callerName, callerDisconnected, defaultDisposition, onSubmit, onDismiss }: DispositionModalProps) => {
     const [selected, setSelected] = useState<CallDisposition | null>(null);
     const [notes, setNotes] = useState('');
+    const appliedDefaultRef = useRef<CallDisposition | null | undefined>(undefined);
+
+    // Pre-select when modal opens with a suggestion
+    if (isOpen && defaultDisposition && appliedDefaultRef.current !== defaultDisposition) {
+        appliedDefaultRef.current = defaultDisposition;
+        setSelected(defaultDisposition);
+    }
 
     const handleSubmit = () => {
         if (selected === null) return;
         onSubmit(selected, notes);
         setSelected(null);
         setNotes('');
+        appliedDefaultRef.current = undefined;
     };
 
     return (