feat: SSE agent state, UCID fix, maint module, QA bug fixes

- Fix outbound disposition: store UCID from dial API response (root cause of silent disposition failure)
- SSE agent state: real-time Ozonetel state drives status toggle (ready/break/calling/in-call/acw)
- Maint module with OTP-protected endpoints (force-ready, unlock-agent, backfill, fix-timestamps)
- Maint OTP modal with PinInput component, keyboard shortcuts (Ctrl+Shift+R/U/B/T)
- Force-logout via SSE: admin unlock pushes force-logout to connected browsers
- Silence JsSIP debug flood, add structured lifecycle logging ([SIP], [DIAL], [DISPOSE], [AGENT-STATE])
- Centralize date formatting with IST-aware formatters across 11 files
- Fix call history: non-overlapping aggregates (completed/missed), correct timestamp display
- Auto-dismiss CallWidget ended/failed state after 3 seconds
- Remove floating "Helix Phone" idle badge from all pages
- Fix dead code in agent-state endpoint (auto-assign was unreachable after return)

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

src/pages/appointments.tsx

@@ -9,7 +9,7 @@ import { Table } from '@/components/application/table/table';
 import { Tabs, TabList, Tab } from '@/components/application/tabs/tabs';
 import { TopBar } from '@/components/layout/top-bar';
 import { PhoneActionCell } from '@/components/call-desk/phone-action-cell';
-import { formatPhone } from '@/lib/format';
+import { formatPhone, formatDateOnly, formatTimeOnly } from '@/lib/format';
 import { apiClient } from '@/lib/api-client';
 
 type AppointmentRecord = {
@@ -60,15 +60,9 @@ const QUERY = `{ appointments(first: 100, orderBy: [{ scheduledAt: DescNullsLast
     doctor { clinic { clinicName } }
 } } } }`;
 
-const formatDate = (iso: string): string => {
-    const d = new Date(iso);
-    return d.toLocaleDateString('en-IN', { day: 'numeric', month: 'short', year: 'numeric' });
-};
+const formatDate = (iso: string): string => formatDateOnly(iso);
 
-const formatTime = (iso: string): string => {
-    const d = new Date(iso);
-    return d.toLocaleTimeString('en-IN', { hour: 'numeric', minute: '2-digit', hour12: true });
-};
+const formatTime = (iso: string): string => formatTimeOnly(iso);
 
 export const AppointmentsPage = () => {
     const [appointments, setAppointments] = useState<AppointmentRecord[]>([]);