fix: sub billing only applies to work an external sub delivered

Report was flagging every unbilled delivered version as "Not Invoiced"
for sub billing, even when a team member delivered it — team work is
billed to the client directly and is never sub-invoiced. Now traces
each version's actual deliverer and shows N/A when it's a team member,
regardless of who delivered earlier versions on the same task.

Also: SubcontractorInvoiceForm no longer masks fetch errors as "No
completed tasks available to invoice" — the real error now shows in
the Completed Tasks panel.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/pages/team/TeamReports.jsx

@@ -34,9 +34,16 @@ function subBillingStatusFromInvoices(items = []) {
 function billingLabel(status) {
   if (status === 'paid') return 'Paid';
   if (status === 'invoiced') return 'Invoiced';
+  if (status === 'not_applicable') return 'N/A';
   return 'Not Invoiced';
 }
 
+function asArray(value) {
+  if (Array.isArray(value)) return value;
+  if (value == null) return [];
+  return typeof value === 'object' ? [value] : [];
+}
+
 function versionTypeLabel(versionNumber) {
   return Number(versionNumber || 0) === 0 ? 'New' : 'Revision';
 }
@@ -85,6 +92,7 @@ export default function TeamReports() {
           { data: submissionRows, error: submissionsError },
           { data: invoiceItemRows, error: invoiceItemsError },
           { data: subInvoiceRows, error: subInvoicesError },
+          { data: profileRows, error: profilesError },
         ] = await Promise.all([
           supabase
             .from('tasks')
@@ -92,7 +100,7 @@ export default function TeamReports() {
             .order('title'),
           supabase
             .from('submissions')
-            .select('id, task_id, type, version_number, submitted_at, invoiced, description')
+            .select('id, task_id, type, version_number, submitted_at, invoiced, description, delivery:deliveries(sent_by)')
             .in('type', ['initial', 'revision'])
             .order('submitted_at', { ascending: true }),
           supabase
@@ -101,15 +109,28 @@ export default function TeamReports() {
           supabase
             .from('subcontractor_invoices')
             .select('status, items:subcontractor_invoice_items(task_id, version_number, description)')
-            .in('status', ['submitted', 'approved', 'paid'])
+            .in('status', ['submitted', 'approved', 'paid']),
+          supabase
+            .from('profiles')
+            .select('name, role'),
         ]);
 
         if (tasksError) throw tasksError;
         if (submissionsError) throw submissionsError;
         if (invoiceItemsError) throw invoiceItemsError;
         if (subInvoicesError) throw subInvoicesError;
+        if (profilesError) throw profilesError;
         if (cancelled) return;
 
+        // Sub billing only applies to work an external subcontractor delivered.
+        // A team member's own delivery is billed to the client directly and is
+        // never sub-invoiced, no matter who started the task's earlier versions.
+        const roleByName = new Map(
+          (profileRows || [])
+            .filter((profile) => profile.name)
+            .map((profile) => [profile.name.trim().toLowerCase(), profile.role])
+        );
+
         const taskMap = new Map((taskRows || []).map((task) => [task.id, task]));
         const companiesMap = new Map();
         const projectsMap = new Map();
@@ -137,6 +158,12 @@ export default function TeamReports() {
           if (!entry.first_submitted_at || (submission.submitted_at && submission.submitted_at < entry.first_submitted_at)) {
             entry.first_submitted_at = submission.submitted_at;
           }
+          // Duplicate submissions for the same task+version can exist (double-submits);
+          // take the deliverer from whichever one actually has a delivery logged.
+          if (!entry.delivered_by) {
+            const deliverer = asArray(submission.delivery)[0]?.sent_by;
+            if (deliverer) entry.delivered_by = deliverer;
+          }
         }
 
         const invoiceItemGroups = new Map();
@@ -190,7 +217,12 @@ export default function TeamReports() {
             const key = `${task.id}:${Number(versionEntry.version_number || 0)}`;
             const invoiceItems = invoiceItemGroups.get(key) || [];
             const billingStatus = billingStatusFromInvoices(invoiceItems);
-            const subBillingStatus = subBillingStatusFromInvoices(subBillingGroups.get(key) || []);
+            const delivererRole = versionEntry.delivered_by
+              ? roleByName.get(versionEntry.delivered_by.trim().toLowerCase()) || null
+              : null;
+            const subBillingStatus = delivererRole === 'external'
+              ? subBillingStatusFromInvoices(subBillingGroups.get(key) || [])
+              : 'not_applicable';
             rows.push({
               key,
               company_id: company?.id || '',