feat: Phase 2 — missed call queue, login redesign, button fix

- Missed call queue with FIFO auto-assignment, dedup, SLA tracking
- Status sub-tabs (Pending/Attempted/Completed/Invalid) in worklist
- missedCallId passed through disposition flow for callback tracking
- Login page redesigned: centered white card on blue background
- Disposition button changed to content-width
- NavAccountCard popover close fix on menu item click

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

src/pages/call-desk.tsx

@@ -21,6 +21,7 @@ export const CallDeskPage = () => {
     const { missedCalls, followUps, marketingLeads, totalPending, loading } = useWorklist();
     const [selectedLead, setSelectedLead] = useState<WorklistLead | null>(null);
     const [contextOpen, setContextOpen] = useState(true);
+    const [activeMissedCallId, setActiveMissedCallId] = useState<string | null>(null);
 
     const isInCall = callState === 'ringing-in' || callState === 'ringing-out' || callState === 'active' || callState === 'ended' || callState === 'failed';
 
@@ -62,7 +63,7 @@ export const CallDeskPage = () => {
                     {/* Active call */}
                     {isInCall && (
                         <div className="p-5">
-                            <ActiveCallCard lead={activeLeadFull} callerPhone={callerNumber ?? ''} />
+                            <ActiveCallCard lead={activeLeadFull} callerPhone={callerNumber ?? ''} missedCallId={activeMissedCallId} onCallComplete={() => setActiveMissedCallId(null)} />
                         </div>
                     )}