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/components/shared/global-search.tsx

@@ -5,6 +5,7 @@ import { faIcon } from '@/lib/icon-wrapper';
 import { Input } from '@/components/base/input/input';
 import { Badge } from '@/components/base/badges/badges';
 import { apiClient } from '@/lib/api-client';
+import { formatShortDate } from '@/lib/format';
 import { cx } from '@/utils/cx';
 
 const SearchIcon = faIcon(faMagnifyingGlass);
@@ -97,7 +98,7 @@ export const GlobalSearch = ({ onSelectResult }: GlobalSearchProps) => {
                 }
 
                 for (const a of data.appointments ?? []) {
-                    const date = a.scheduledAt ? new Date(a.scheduledAt).toLocaleDateString('en-IN', { day: 'numeric', month: 'short' }) : '';
+                    const date = a.scheduledAt ? formatShortDate(a.scheduledAt) : '';
                     searchResults.push({
                         id: a.id,
                         type: 'appointment',