fix: 5 issues - leads 500, prepaid amount/invoice, install RESOLVED, dup tickets, confirm fail

app/(app)/leads/[id].tsx

@@ -72,14 +72,13 @@ export default function LeadDetailScreen() {
       });
       const client = clientRes.data;
 
-      // Create installation ticket
-      const ticketRes = await api.post('/api/v1/tickets', {
-        clientId: client.id,
-        subject:  `New Installation — ${lead.firstName} ${lead.lastName !== '—' ? lead.lastName : ''}`.trim(),
-        type:     'INSTALLATION',
-        priority: 'NORMAL',
-      });
-      const ticket = ticketRes.data;
+      // Fetch the auto-created installation ticket (API creates one on client creation)
+      let ticket: any = null;
+      try {
+        const tRes = await api.get(`/api/v1/tickets?clientId=${client.id}&type=INSTALLATION&limit=1`);
+        const items = tRes.data?.data ?? tRes.data ?? [];
+        ticket = items[0] ?? null;
+      } catch {}
 
       // Mark lead as CONVERTED
       await api.patch(`/api/v1/leads/${id}`, {