fix: P1 defect batch — hide Decline button, remove No Campaign pill, remove Remind column

- active-call-card: Decline button hidden (reject returns call to
  Ozonetel queue, product says not needed for now)
- all-leads: removed "No Campaign" pill and __none__ filter logic
- appointments-v2: removed REMIND column header + cell + unused
  handleSendReminder, isUpcoming, buildReminderMessage, formatDateTime

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

src/components/call-desk/active-call-card.tsx

@@ -41,7 +41,7 @@ const formatDuration = (seconds: number): string => {
 
 export const ActiveCallCard = ({ lead, callerPhone, missedCallId, onCallComplete }: ActiveCallCardProps) => {
     const { user } = useAuth();
-    const { callState, callDuration, callUcid, isMuted, isOnHold, answer, reject, hangup, toggleMute, toggleHold } = useSip();
+    const { callState, callDuration, callUcid, isMuted, isOnHold, answer, hangup, toggleMute, toggleHold } = useSip();
     const setCallState = useSetAtom(sipCallStateAtom);
     const setCallerNumber = useSetAtom(sipCallerNumberAtom);
     const setCallUcid = useSetAtom(sipCallUcidAtom);
@@ -248,7 +248,7 @@ export const ActiveCallCard = ({ lead, callerPhone, missedCallId, onCallComplete
                 </div>
                 <div className="mt-3 flex gap-2">
                     <Button size="sm" color="primary" onClick={answer}>Answer</Button>
-                    <Button size="sm" color="tertiary-destructive" onClick={reject}>Decline</Button>
+                    {/* Decline hidden per product — reject returns call to Ozonetel queue */}
                 </div>
             </div>
         );