fix: wire role-based views — sidebar auth, user display, table tabs, card actions

- Sidebar: use useAuth() for isAdmin and pass auth user to NavAccountCard
- NavAccountCard: fix bug where items prop was ignored (used placeholderAccounts)
- TopBar: replace hardcoded "SM" initials with user.initials from auth
- All Leads: add "My Leads" tab filtering by assignedAgent matching user
- Lead Card: add role-aware action buttons (Call/Disposition for assigned leads)
- Lead Workspace: pass onLogCall/onUpdateStatus handlers to LeadCard

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

src/components/leads/lead-card.tsx

@@ -14,6 +14,8 @@ interface LeadCardProps {
     onMessage: (lead: Lead) => void;
     onMarkSpam: (lead: Lead) => void;
     onMerge: (lead: Lead) => void;
+    onLogCall?: (lead: Lead) => void;
+    onUpdateStatus?: (lead: Lead) => void;
 }
 
 const sourceLabelMap: Record<string, string> = {
@@ -29,7 +31,7 @@ const sourceLabelMap: Record<string, string> = {
     OTHER: 'Other',
 };
 
-export const LeadCard = ({ lead, onAssign, onMessage, onMarkSpam, onMerge }: LeadCardProps) => {
+export const LeadCard = ({ lead, onAssign, onMessage, onMarkSpam, onMerge, onLogCall, onUpdateStatus }: LeadCardProps) => {
     const firstName = lead.contactName?.firstName ?? '';
     const lastName = lead.contactName?.lastName ?? '';
     const name = `${firstName} ${lastName}`.trim() || 'Unknown';
@@ -38,6 +40,7 @@ export const LeadCard = ({ lead, onAssign, onMessage, onMarkSpam, onMerge }: Lea
     const sourceLabel = lead.leadSource ? sourceLabelMap[lead.leadSource] ?? lead.leadSource : '';
     const isSpam = (lead.spamScore ?? 0) >= 60;
     const isDuplicate = lead.isDuplicate === true;
+    const isAssigned = lead.assignedAgent !== null && lead.leadStatus !== 'NEW';
 
     return (
         <div
@@ -99,6 +102,15 @@ export const LeadCard = ({ lead, onAssign, onMessage, onMarkSpam, onMerge }: Lea
                             Merge
                         </Button>
                     </>
+                ) : isAssigned ? (
+                    <>
+                        <Button size="sm" color="primary" onClick={() => onLogCall?.(lead)}>
+                            Call
+                        </Button>
+                        <Button size="sm" color="secondary" onClick={() => onUpdateStatus?.(lead)}>
+                            Disposition
+                        </Button>
+                    </>
                 ) : (
                     <>
                         <Button size="sm" color="primary" onClick={() => onAssign(lead)}>