Add Phase 13 internal accounting model

app/ui/app.py

@@ -46,6 +46,7 @@ from app.modules.accounting.purchase_review_ui import router as accounting_purch
 from app.modules.accounting.purchase_posting_ui import router as accounting_purchase_posting_ui_router
 from app.modules.accounting.bank_ui import router as accounting_bank_ui_router
 from app.modules.accounting.ai_ui import router as accounting_ai_ui_router
+from app.modules.accounting.internal_model_ui import router as accounting_internal_model_ui_router
 from app.modules.registrations.ui import router as registrations_ui_router
 from app.modules.credential_vault.ui import router as credential_vault_ui_router
 from app.modules.client_identity.ui import router as client_identity_ui_router
@@ -78,6 +79,7 @@ def mount_ui(app: FastAPI) -> None:
     app.include_router(accounting_purchase_posting_ui_router)
     app.include_router(accounting_bank_ui_router)
     app.include_router(accounting_ai_ui_router)
+    app.include_router(accounting_internal_model_ui_router)
     app.include_router(work_tracker_ui_router)
     app.include_router(billing_ui_router)
     app.include_router(platform_billing_ui_router)