Changes

Co-authored-by: renee-png <262607627+renee-png@users.noreply.github.com>

src/routes/settings.import.tsx

@@ -569,7 +569,7 @@ const IMPORTERS: ImporterConfig[] = [
   {
     key: "invoices",
     label: "Invoices → Invoices",
-    description: "Invoice headers (line items not imported). If the client isn't recognized, an archived client is auto-created. If the case isn't recognized, an archived placeholder case is auto-created so the reference is preserved.",
+    description: "Invoice headers. Matched against existing invoices by invoice number (preferred) or external ID — when a match exists, only header fields (status, dates, notes) are updated and totals are left intact (totals = sum of attached time/expense line items). Non-matching invoices are inserted as new. Import time entries and expenses FIRST so their invoices are auto-created as drafts; this CSV then promotes them to sent/paid/etc.",
     table: "invoices",
     conflict: "external_id",
     // Only invoice_number is strictly required at the row level. client_id is