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/missed-calls.tsx

@@ -10,7 +10,7 @@ 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 { apiClient } from '@/lib/api-client';
-import { formatPhone } from '@/lib/format';
+import { formatPhone, formatDateTimeShort } from '@/lib/format';
 
 type MissedCallRecord = {
     id: string;
@@ -32,8 +32,7 @@ const QUERY = `{ calls(first: 200, filter: {
     startedAt callsourcenumber callbackstatus missedcallcount callbackattemptedat
 } } } }`;
 
-const formatDate = (iso: string): string =>
-    new Date(iso).toLocaleDateString('en-IN', { day: 'numeric', month: 'short', hour: 'numeric', minute: '2-digit', hour12: true });
+const formatDate = (iso: string): string => formatDateTimeShort(iso);
 
 const computeSla = (dateStr: string): { label: string; color: 'success' | 'warning' | 'error' } => {
     const minutes = Math.max(0, Math.round((Date.now() - new Date(dateStr).getTime()) / 60000));