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/call-desk/live-transcript.tsx

@@ -1,6 +1,7 @@
 import { useEffect, useRef } from 'react';
 import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
 import { faSparkles, faMicrophone } from '@fortawesome/pro-duotone-svg-icons';
+import { formatTimeFull } from '@/lib/format';
 import { cx } from '@/utils/cx';
 
 type TranscriptLine = {
@@ -78,7 +79,7 @@ export const LiveTranscript = ({ transcript, suggestions, connected }: LiveTrans
                             item.isFinal ? "text-primary" : "text-tertiary italic",
                         )}>
                             <span className="text-xs text-quaternary mr-2">
-                                {item.timestamp.toLocaleTimeString('en-IN', { hour: '2-digit', minute: '2-digit', second: '2-digit' })}
+                                {formatTimeFull(item.timestamp.toISOString())}
                             </span>
                             {item.text}
                         </div>