Add Invoice model to objectModels and re-export for direct access.

src/database/ObjectModels.js

@@ -30,6 +30,7 @@ import { DocumentPrinter } from './models/DocumentPrinter.js'
 import { DocumentJob } from './models/DocumentJob.js'
 import { TaxRate } from './models/TaxRate.js'
 import { TaxRecord } from './models/TaxRecord.js'
+import { Invoice } from './models/Invoice.js'
 import QuestionCircleIcon from '../components/Icons/QuestionCircleIcon'
 
 export const objectModels = [
@@ -64,7 +65,8 @@ export const objectModels = [
   DocumentPrinter,
   DocumentJob,
   TaxRate,
-  TaxRecord
+  TaxRecord,
+  Invoice
 ]
 
 // Re-export individual models for direct access
@@ -100,7 +102,8 @@ export {
   DocumentPrinter,
   DocumentJob,
   TaxRate,
-  TaxRecord
+  TaxRecord,
+  Invoice
 }
 
 export function getModelByName(name, ignoreCase = false) {