DAT-03: 03 datev export oberflaeche protokoll

Backend: additive List()/ListForTenant()-Methoden fuer DAT-01/DAT-02
(kein Aenderungen an bestehendem Code), neues Paket datevapi (POST/GET
/datev/exports), gleiches Auth-Muster wie statusapi (API-02).
Frontend: web/datev-export (Next.js/React/TS + @nexarch/shl) mit
Formular (Zeitraum-Auswahl) und Protokolltabelle, fehlgeschlagene
Uebertragung farblich/textlich klar erkennbar.

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

connect/cmd/datev-a11y-fixture/main.go

@@ -0,0 +1,166 @@
+// Command datev-a11y-fixture wraps the real datevapi with permissive CORS
+// headers, exactly like status-a11y-fixture does for API-02, plus fake
+// Archive/DATEV-target servers so a real successful AND a real failed
+// export run can be seeded before the browser-based accessibility run
+// starts. The production connect-app binary is unchanged.
+package main
+
+import (
+	"context"
+	"log"
+	"net"
+	"net/http"
+	"os"
+	"time"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+
+	"gitea.perlbach24.de/scripte/nexarch/connect/internal/archiveclient"
+	"gitea.perlbach24.de/scripte/nexarch/connect/internal/datevapi"
+	"gitea.perlbach24.de/scripte/nexarch/connect/internal/datevexport"
+	"gitea.perlbach24.de/scripte/nexarch/connect/internal/datevtransfer"
+)
+
+func cors(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		w.Header().Set("Access-Control-Allow-Methods", "GET, POST, OPTIONS")
+		w.Header().Set("Access-Control-Allow-Headers", "X-User-Id, X-Tenant-Slug, Content-Type")
+		if r.Method == http.MethodOptions {
+			w.WriteHeader(http.StatusNoContent)
+			return
+		}
+		next.ServeHTTP(w, r)
+	})
+}
+
+func startServer(handler http.Handler) string {
+	ln, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		log.Fatalf("datev-a11y-fixture: hilfsserver: %v", err)
+	}
+	srv := &http.Server{Handler: handler}
+	go func() { _ = srv.Serve(ln) }()
+	return "http://" + ln.Addr().String()
+}
+
+func startFakeArchive() string {
+	mux := http.NewServeMux()
+	mux.HandleFunc("/register", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		_, _ = w.Write([]byte(`{"id":"reg-1"}`))
+	})
+	return startServer(mux)
+}
+
+func startFakeDatevTarget(fail bool) string {
+	mux := http.NewServeMux()
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		if fail {
+			http.Error(w, "simulierter uebertragungsfehler", http.StatusServiceUnavailable)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		_, _ = w.Write([]byte(`{"transferId":"tx-1"}`))
+	})
+	return startServer(mux)
+}
+
+func sampleHeader() datevexport.Header {
+	return datevexport.Header{
+		ConsultantNumber: "1001",
+		ClientNumber:     "42",
+		FiscalYearStart:  time.Date(2026, 1, 1, 0, 0, 0, 0, time.UTC),
+		AccountLength:    4,
+		PeriodStart:      time.Date(2026, 3, 1, 0, 0, 0, 0, time.UTC),
+		PeriodEnd:        time.Date(2026, 3, 31, 0, 0, 0, 0, time.UTC),
+		Description:      "a11y-fixture",
+	}
+}
+
+func sampleEntry() datevexport.Entry {
+	return datevexport.Entry{
+		Amount: 119.0, DebitCredit: "S", Account: "1200", CounterAccount: "4400",
+		Date: time.Date(2026, 3, 15, 0, 0, 0, 0, time.UTC), Text: "Büromaterial", DocumentRef: "RE-2026-001",
+	}
+}
+
+func seed(exports *datevexport.Store, successTransfers, failedTransfers *datevtransfer.Store) {
+	ctx := context.Background()
+
+	_, run1, err := exports.RunExport(ctx, "a11y", sampleHeader(), []datevexport.Entry{sampleEntry()}, "")
+	if err != nil {
+		log.Fatalf("datev-a11y-fixture: seed erfolgreicher lauf: %v", err)
+	}
+	if _, err := successTransfers.Start(ctx, "a11y", run1.ID, run1.ID+".csv", []byte("csv")); err != nil {
+		log.Fatalf("datev-a11y-fixture: seed erfolgreiche uebertragung: %v", err)
+	}
+
+	file2, run2, err := exports.RunExport(ctx, "a11y", sampleHeader(), []datevexport.Entry{sampleEntry()}, "")
+	if err != nil {
+		log.Fatalf("datev-a11y-fixture: seed fehlgeschlagener lauf: %v", err)
+	}
+	if _, err := failedTransfers.Start(ctx, "a11y", run2.ID, run2.ID+".csv", file2); err != nil {
+		log.Printf("datev-a11y-fixture: erwarteter fehlschlag der uebertragung: %v", err)
+	}
+}
+
+func main() {
+	dsn := os.Getenv("NEXARCH_CONNECT_APP_TENANT_DSN")
+	if dsn == "" {
+		log.Fatal("datev-a11y-fixture: NEXARCH_CONNECT_APP_TENANT_DSN ist erforderlich")
+	}
+	addr := os.Getenv("NEXARCH_CONNECT_APP_LISTEN_ADDR")
+	if addr == "" {
+		addr = "127.0.0.1:9501"
+	}
+	pool, err := pgxpool.New(context.Background(), dsn)
+	if err != nil {
+		log.Fatalf("datev-a11y-fixture: datenbankverbindung: %v", err)
+	}
+	defer pool.Close()
+
+	archiveURL := startFakeArchive()
+	successTarget := startFakeDatevTarget(false)
+	failTarget := startFakeDatevTarget(true)
+
+	exports := &datevexport.Store{
+		Pool:        pool,
+		Archive:     archiveclient.New(archiveURL, "svc-tok"),
+		CallbackURL: "https://connect.example.internal/datev/callback",
+	}
+	successTransfers := &datevtransfer.Store{
+		Pool: pool,
+		Client: &datevtransfer.Client{
+			HTTPClient: http.DefaultClient,
+			Config:     datevtransfer.Config{Endpoint: successTarget, Token: "tok", ConsultantNumber: "1001", ClientNumber: "42"},
+		},
+	}
+	failedTransfers := &datevtransfer.Store{
+		Pool: pool,
+		Client: &datevtransfer.Client{
+			HTTPClient: http.DefaultClient,
+			Config:     datevtransfer.Config{Endpoint: failTarget, Token: "tok", ConsultantNumber: "1001", ClientNumber: "42"},
+		},
+	}
+	seed(exports, successTransfers, failedTransfers)
+
+	// The a11y run only reads via GET /datev/exports and triggers new
+	// exports against the success target, so the API server itself uses
+	// the success-target transfer store.
+	mux := http.NewServeMux()
+	datevapi.NewServer(exports, successTransfers).RegisterRoutes(mux)
+
+	srv := &http.Server{
+		Addr:              addr,
+		Handler:           cors(mux),
+		ReadHeaderTimeout: 5 * time.Second,
+		ReadTimeout:       15 * time.Second,
+		WriteTimeout:      15 * time.Second,
+		IdleTimeout:       60 * time.Second,
+	}
+	log.Printf("datev-a11y-fixture: listening on %s", addr)
+	log.Fatal(srv.ListenAndServe())
+}

connect/docs/DAT-03-PRUEFPROTOKOLL.md

@@ -0,0 +1,39 @@
+# DAT-03 – Prüfprotokoll (DATEV-Export-Oberfläche & Protokoll)
+
+Datum: 2026-09-26. Host: Entwicklungshost 192.168.1.204 (Wegwerf-Cluster, eigene DB/Rolle je Lauf, vollständig zurückgebaut).
+
+## Ausgangslage
+
+Kein HTTP-API-Layer existierte für `connect/internal/datevexport` (DAT-01) und `connect/internal/datevtransfer` (DAT-02) — beide waren bis dahin reine Bibliothekspakete. Für diese Kachel wurde der kleinstmögliche Layer ergänzt:
+
+- `connect/internal/datevexport`: additive Methode `List(ctx, tenantSlug)` — kein bestehender Code geändert.
+- `connect/internal/datevtransfer`: additive Methode `ListForTenant(ctx, tenantSlug)` — kein bestehender Code geändert.
+- Neues Paket `connect/internal/datevapi`: `POST /datev/exports` (Export mit Zeitraum-Auswahl anstoßen, danach sofortige Übertragung), `GET /datev/exports` (Protokoll je Mandant, Übertragungsstatus verknüpft). Identität über `X-User-Id`/`X-Tenant-Slug`, exakt das etablierte Muster aus `statusapi` (API-02).
+- Neue Next.js/React/TS-App `web/datev-export` (`@nexarch/shl`): Formular (Beraternummer, Mandantennummer, Wirtschaftsjahresbeginn, Sachkontenlänge, Bezeichnung, Zeitraum von/bis) + Protokolltabelle mit farblich/textlich klar unterscheidbarem Übertragungsstatus.
+
+Die Belegauswahl aus DMS-Dokumenten ist nicht Bestandteil dieser Kachel (siehe „Nicht Bestandteil"/QA-03) — das Formular erzeugt beim Anstoß einen synthetischen Testbeleg, um den vollständigen Weg Anstoß→Protokoll nachzuweisen, ohne die eigentliche Belegquelle vorwegzunehmen.
+
+## Akzeptanzkriterien
+
+1. **Export lässt sich über die Oberfläche mit Zeitraum-Auswahl anstoßen** — erfüllt. Formular mit Zeitraum-Feldern, `POST /datev/exports` real getestet (Backend: `TestHandleTrigger_SuccessfulRun`; Frontend: `stoesst einen Export mit den eingegebenen Werten an`).
+2. **Exportprotokoll ist je Lauf einsehbar** — erfüllt. `GET /datev/exports` real getestet (`TestHandleList_ShowsRealRuns`, `TestHandleList_TenantIsolation`; Frontend: `zeigt reale Testlaeufe im Protokoll an`).
+3. **Fehlgeschlagener Export ist in der Oberfläche klar erkennbar** — erfüllt. Übertragungsstatus `failed`/`retry_pending` erscheint in eigener Warnfarbe mit `role="alert"` bzw. sichtbarer Fehlermeldung (Backend: `TestHandleTrigger_FailedTransferIsVisible`; Frontend: `markiert einen fehlgeschlagenen Testlauf klar erkennbar`).
+
+## Prüfungen vor der Abnahme
+
+| # | Prüfung | Ergebnis |
+|---|---|---|
+| 1 | Export-Anstoß im Test aus der Oberfläche erfolgreich | **Bestanden.** Realer Testlauf über das Formular (Frontend-Test mit `fireEvent`), Backend erzeugt echten `datev_exports`-Datensatz + Archiv-Registrierung (RET-05-Fake) + Übertragungsversuch gegen ein Fake-DATEV-Zielsystem. |
+| 2 | Protokollansicht zeigt reale Testläufe korrekt an | **Bestanden.** Zwei echte Läufe (ein erfolgreicher, ein fehlgeschlagener) über die a11y-Fixture (`connect/cmd/datev-a11y-fixture`, dieselbe Postgres-DB wie die Backend-Tests) erzeugt und via `GET /datev/exports` in der laufenden Oberfläche real abgerufen — siehe pa11y-Lauf unten, der exakt diese zwei Zustände sah. |
+| 3 | Fehlgeschlagener Testlauf ist visuell klar unterscheidbar | **Bestanden.** Zweiter Lauf zeigt `Fehlgeschlagen`-Text in Warnfarbe (`role="alert"`) mit der realen Fehlermeldung (`datevtransfer: zielsystem antwortete 503: ...`) sichtbar in der Fehlerdiagnose-Spalte, klar abgesetzt vom `Erfolgreich`-Lauf. |
+
+## Echte Testläufe
+
+- Backend: `go test ./internal/datevapi/...` — 5/5 grün (Trigger erfolgreich, Identität erforderlich, fehlgeschlagene Übertragung sichtbar, Protokoll zeigt reale Läufe, Mandantentrennung). Volle `connect`-Modul-Regression (`go test ./... -p 1`, `-p 1` wegen einer bekannten, vorbestehenden Parallelitätskollision bei der `pgcrypto`-Extension zwischen unabhängigen Testpaketen, keine Regression durch diese Kachel) — alle 17 Pakete grün.
+- Frontend: `npx vitest run` — 4/4 grün. `npx tsc --noEmit` — sauber. `npx next build` — erfolgreich (Turbopack/`@nexarch/shl`-Symlink-Fix angewendet: echte Kopie statt Symlink in `node_modules/@nexarch/shl`, sonst schlägt die React-Auflösung fehl).
+- Barrierefreiheit: echter `pa11y --standard WCAG2AA` (Chrome stable, `--no-sandbox`) gegen den laufenden Produktionsbuild (`next start`), bedient von `connect/cmd/datev-a11y-fixture` (reales Postgres, zwei real geseedete Läufe — ein Erfolg, ein Fehlschlag über einen echten Fake-DATEV-Zielserver mit HTTP 503) — **„No issues found!"**.
+
+## Nicht Bestandteil dieser Kachel
+
+- `QA-03` Prüfgate ERP/DATEV/M365 — nicht Teil dieser Kachel, nur die Schnittstelle (`datevapi`) steht bereit.
+- Belegauswahl aus DMS-Dokumenten — Formular erzeugt einen synthetischen Testbeleg je Anstoß, echte Beleg-Herkunft ist eine spätere Kachel.

connect/internal/datevapi/datevapi.go

@@ -0,0 +1,194 @@
+// Package datevapi is the HTTP binding for DAT-03: triggering a DATEV
+// export by period and viewing the export/transfer protocol. Identity
+// comes from X-User-Id/X-Tenant-Slug, same transitional pattern as
+// statusapi (API-02) — no change to datevexport/datevtransfer.
+package datevapi
+
+import (
+	"encoding/json"
+	"net/http"
+	"time"
+
+	"gitea.perlbach24.de/scripte/nexarch/connect/internal/datevexport"
+	"gitea.perlbach24.de/scripte/nexarch/connect/internal/datevtransfer"
+)
+
+type Server struct {
+	Exports   *datevexport.Store
+	Transfers *datevtransfer.Store
+}
+
+func NewServer(exports *datevexport.Store, transfers *datevtransfer.Store) *Server {
+	return &Server{Exports: exports, Transfers: transfers}
+}
+
+func (s *Server) RegisterRoutes(mux *http.ServeMux) {
+	mux.HandleFunc("POST /datev/exports", s.requireIdentity(s.handleTrigger))
+	mux.HandleFunc("GET /datev/exports", s.requireIdentity(s.handleList))
+}
+
+func (s *Server) requireIdentity(next func(w http.ResponseWriter, r *http.Request, tenantSlug string)) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if r.Header.Get("X-User-Id") == "" {
+			writeError(w, http.StatusUnauthorized, "X-User-Id fehlt")
+			return
+		}
+		tenant := r.Header.Get("X-Tenant-Slug")
+		if tenant == "" {
+			writeError(w, http.StatusUnauthorized, "X-Tenant-Slug fehlt")
+			return
+		}
+		next(w, r, tenant)
+	}
+}
+
+type triggerRequest struct {
+	ConsultantNumber string              `json:"consultant_number"`
+	ClientNumber     string              `json:"client_number"`
+	FiscalYearStart  string              `json:"fiscal_year_start"`
+	AccountLength    int                 `json:"account_length"`
+	Description      string              `json:"description"`
+	PeriodStart      string              `json:"period_start"`
+	PeriodEnd        string              `json:"period_end"`
+	Entries          []datevexport.Entry `json:"entries"`
+}
+
+type runResponse struct {
+	ID             string  `json:"id"`
+	PeriodStart    string  `json:"period_start"`
+	PeriodEnd      string  `json:"period_end"`
+	EntryCount     int     `json:"entry_count"`
+	RetentionClass string  `json:"retention_class"`
+	CreatedAt      string  `json:"created_at"`
+	TransferStatus string  `json:"transfer_status,omitempty"`
+	TransferError  string  `json:"transfer_error,omitempty"`
+}
+
+func (s *Server) handleTrigger(w http.ResponseWriter, r *http.Request, tenantSlug string) {
+	var req triggerRequest
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeError(w, http.StatusBadRequest, "ungueltige anfrage")
+		return
+	}
+	periodStart, err := time.Parse("2006-01-02", req.PeriodStart)
+	if err != nil {
+		writeError(w, http.StatusBadRequest, "period_start ungueltig, erwartet YYYY-MM-DD")
+		return
+	}
+	periodEnd, err := time.Parse("2006-01-02", req.PeriodEnd)
+	if err != nil {
+		writeError(w, http.StatusBadRequest, "period_end ungueltig, erwartet YYYY-MM-DD")
+		return
+	}
+	fiscalYearStart, err := time.Parse("2006-01-02", req.FiscalYearStart)
+	if err != nil {
+		writeError(w, http.StatusBadRequest, "fiscal_year_start ungueltig, erwartet YYYY-MM-DD")
+		return
+	}
+	if len(req.Entries) == 0 {
+		writeError(w, http.StatusBadRequest, "keine belege im export")
+		return
+	}
+
+	header := datevexport.Header{
+		ConsultantNumber: req.ConsultantNumber,
+		ClientNumber:     req.ClientNumber,
+		FiscalYearStart:  fiscalYearStart,
+		AccountLength:    req.AccountLength,
+		PeriodStart:      periodStart,
+		PeriodEnd:        periodEnd,
+		Description:      req.Description,
+	}
+	file, run, err := s.Exports.RunExport(r.Context(), tenantSlug, header, req.Entries, "")
+	if err != nil {
+		writeError(w, http.StatusUnprocessableEntity, err.Error())
+		return
+	}
+
+	resp := runResponse{
+		ID:             run.ID,
+		PeriodStart:    run.PeriodStart.Format("2006-01-02"),
+		PeriodEnd:      run.PeriodEnd.Format("2006-01-02"),
+		EntryCount:     run.EntryCount,
+		RetentionClass: run.RetentionClass,
+		CreatedAt:      run.CreatedAt.Format(time.RFC3339),
+	}
+
+	if s.Transfers != nil {
+		transfer, terr := s.Transfers.Start(r.Context(), tenantSlug, run.ID, run.ID+".csv", file)
+		if terr != nil {
+			resp.TransferStatus = string(datevtransfer.StatusFailed)
+			resp.TransferError = terr.Error()
+		} else {
+			resp.TransferStatus = string(transfer.Status)
+			resp.TransferError = transfer.LastError
+		}
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusCreated)
+	_ = json.NewEncoder(w).Encode(resp)
+}
+
+type protocolEntry struct {
+	runResponse
+}
+
+func (s *Server) handleList(w http.ResponseWriter, r *http.Request, tenantSlug string) {
+	runs, err := s.Exports.List(r.Context(), tenantSlug)
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, "exportlaeufe konnten nicht geladen werden")
+		return
+	}
+
+	var transfers []datevtransferListItem
+	if s.Transfers != nil {
+		ts, err := s.Transfers.ListForTenant(r.Context(), tenantSlug)
+		if err != nil {
+			writeError(w, http.StatusInternalServerError, "transfers konnten nicht geladen werden")
+			return
+		}
+		for _, t := range ts {
+			transfers = append(transfers, datevtransferListItem{exportRunID: t.ExportRunID, status: string(t.Status), lastError: t.LastError})
+		}
+	}
+
+	byRun := map[string]datevtransferListItem{}
+	for _, t := range transfers {
+		if _, ok := byRun[t.exportRunID]; !ok {
+			byRun[t.exportRunID] = t
+		}
+	}
+
+	out := make([]runResponse, 0, len(runs))
+	for _, run := range runs {
+		resp := runResponse{
+			ID:             run.ID,
+			PeriodStart:    run.PeriodStart.Format("2006-01-02"),
+			PeriodEnd:      run.PeriodEnd.Format("2006-01-02"),
+			EntryCount:     run.EntryCount,
+			RetentionClass: run.RetentionClass,
+			CreatedAt:      run.CreatedAt.Format(time.RFC3339),
+		}
+		if t, ok := byRun[run.ID]; ok {
+			resp.TransferStatus = t.status
+			resp.TransferError = t.lastError
+		}
+		out = append(out, resp)
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	_ = json.NewEncoder(w).Encode(out)
+}
+
+type datevtransferListItem struct {
+	exportRunID string
+	status      string
+	lastError   string
+}
+
+func writeError(w http.ResponseWriter, status int, msg string) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(status)
+	_ = json.NewEncoder(w).Encode(map[string]string{"error": msg})
+}

connect/internal/datevapi/datevapi_test.go

@@ -0,0 +1,267 @@
+package datevapi
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"os"
+	"testing"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+
+	"gitea.perlbach24.de/scripte/nexarch/connect/internal/archiveclient"
+	"gitea.perlbach24.de/scripte/nexarch/connect/internal/datevexport"
+	"gitea.perlbach24.de/scripte/nexarch/connect/internal/datevtransfer"
+	"gitea.perlbach24.de/scripte/nexarch/connect/internal/migrate"
+	"gitea.perlbach24.de/scripte/nexarch/connect/internal/testdb"
+)
+
+func fakeArchiveRegister(t *testing.T) *httptest.Server {
+	t.Helper()
+	return httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/register" {
+			http.NotFound(w, r)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		_ = json.NewEncoder(w).Encode(map[string]string{"id": "reg-1"})
+	}))
+}
+
+func fakeDatevTarget(t *testing.T, fail bool) *httptest.Server {
+	t.Helper()
+	return httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if fail {
+			http.Error(w, "simulierter fehler", http.StatusServiceUnavailable)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		_ = json.NewEncoder(w).Encode(map[string]string{"transferId": "tx-1"})
+	}))
+}
+
+func openTestPool(t *testing.T) *pgxpool.Pool {
+	t.Helper()
+	dsn := os.Getenv("TEST_TENANT_DSN")
+	if dsn == "" {
+		t.Skip("TEST_TENANT_DSN nicht gesetzt, Integrationstest uebersprungen")
+	}
+	pool := testdb.Pool(t, dsn)
+
+	dir, _ := os.Getwd()
+	migDir := ""
+	for i := 0; i < 6; i++ {
+		p := dir + "/migrations"
+		if fi, err := os.Stat(p); err == nil && fi.IsDir() {
+			migDir = p
+			break
+		}
+		dir += "/.."
+	}
+	if migDir == "" {
+		t.Fatal("connect/migrations nicht gefunden")
+	}
+	migrations, err := migrate.Load(migDir)
+	if err != nil {
+		t.Fatalf("migrationen laden: %v", err)
+	}
+	if _, err := migrate.Up(context.Background(), pool, migrations); err != nil {
+		t.Fatalf("migrationen anwenden: %v", err)
+	}
+	return pool
+}
+
+func newTestServer(t *testing.T, transferFails bool) (*Server, func()) {
+	t.Helper()
+	pool := openTestPool(t)
+	archiveSrv := fakeArchiveRegister(t)
+	datevSrv := fakeDatevTarget(t, transferFails)
+
+	exports := &datevexport.Store{
+		Pool:        pool,
+		Archive:     archiveclient.New(archiveSrv.URL, "svc-tok"),
+		CallbackURL: "https://connect.example.internal/datev/callback",
+	}
+	transfers := &datevtransfer.Store{
+		Pool: pool,
+		Client: &datevtransfer.Client{
+			HTTPClient: http.DefaultClient,
+			Config:     datevtransfer.Config{Endpoint: datevSrv.URL, Token: "tok", ConsultantNumber: "1001", ClientNumber: "42"},
+		},
+	}
+	return NewServer(exports, transfers), func() {
+		archiveSrv.Close()
+		datevSrv.Close()
+	}
+}
+
+func validTriggerBody() []byte {
+	body := map[string]any{
+		"consultant_number": "1001",
+		"client_number":     "42",
+		"fiscal_year_start": "2026-01-01",
+		"account_length":    4,
+		"description":       "März 2026",
+		"period_start":      "2026-03-01",
+		"period_end":        "2026-03-31",
+		"entries": []map[string]any{
+			{
+				"Amount": 119.0, "DebitCredit": "S", "Account": "1200", "CounterAccount": "4400",
+				"Date": "2026-03-15T00:00:00Z", "Text": "Büromaterial", "DocumentRef": "RE-2026-001",
+			},
+		},
+	}
+	b, _ := json.Marshal(body)
+	return b
+}
+
+// AC1: Export laesst sich ueber die Oberflaeche (per Anfrage an diesen
+// Endpunkt) mit Zeitraum-Auswahl anstossen.
+func TestHandleTrigger_SuccessfulRun(t *testing.T) {
+	srv, cleanup := newTestServer(t, false)
+	defer cleanup()
+	mux := http.NewServeMux()
+	srv.RegisterRoutes(mux)
+
+	req := httptest.NewRequest(http.MethodPost, "/datev/exports", bytes.NewReader(validTriggerBody()))
+	req.Header.Set("X-User-Id", "u1")
+	req.Header.Set("X-Tenant-Slug", "acme")
+	rec := httptest.NewRecorder()
+	mux.ServeHTTP(rec, req)
+
+	if rec.Code != http.StatusCreated {
+		t.Fatalf("erwartet 201, bekam %d: %s", rec.Code, rec.Body.String())
+	}
+	var resp runResponse
+	if err := json.NewDecoder(rec.Body).Decode(&resp); err != nil {
+		t.Fatalf("antwort dekodieren: %v", err)
+	}
+	if resp.EntryCount != 1 {
+		t.Fatalf("erwartet 1 Beleg, bekam %d", resp.EntryCount)
+	}
+	if resp.TransferStatus != string(datevtransfer.StatusSuccess) {
+		t.Fatalf("erwartet transfer-status success, bekam %q", resp.TransferStatus)
+	}
+}
+
+func TestHandleTrigger_RequiresIdentity(t *testing.T) {
+	srv, cleanup := newTestServer(t, false)
+	defer cleanup()
+	mux := http.NewServeMux()
+	srv.RegisterRoutes(mux)
+
+	req := httptest.NewRequest(http.MethodPost, "/datev/exports", bytes.NewReader(validTriggerBody()))
+	rec := httptest.NewRecorder()
+	mux.ServeHTTP(rec, req)
+	if rec.Code != http.StatusUnauthorized {
+		t.Fatalf("erwartet 401 ohne Identitaet, bekam %d", rec.Code)
+	}
+}
+
+// AC3: Fehlgeschlagener Export ist ueber den Transfer-Status klar erkennbar.
+func TestHandleTrigger_FailedTransferIsVisible(t *testing.T) {
+	srv, cleanup := newTestServer(t, true)
+	defer cleanup()
+	mux := http.NewServeMux()
+	srv.RegisterRoutes(mux)
+
+	req := httptest.NewRequest(http.MethodPost, "/datev/exports", bytes.NewReader(validTriggerBody()))
+	req.Header.Set("X-User-Id", "u1")
+	req.Header.Set("X-Tenant-Slug", "acme")
+	rec := httptest.NewRecorder()
+	mux.ServeHTTP(rec, req)
+
+	if rec.Code != http.StatusCreated {
+		t.Fatalf("erwartet 201 (Exportlauf wird trotz Uebertragungsfehler protokolliert), bekam %d: %s", rec.Code, rec.Body.String())
+	}
+	var resp runResponse
+	if err := json.NewDecoder(rec.Body).Decode(&resp); err != nil {
+		t.Fatalf("antwort dekodieren: %v", err)
+	}
+	if resp.TransferStatus != string(datevtransfer.StatusRetryPending) && resp.TransferStatus != string(datevtransfer.StatusFailed) {
+		t.Fatalf("erwartet fehlgeschlagenen/retry-status, bekam %q", resp.TransferStatus)
+	}
+	if resp.TransferError == "" {
+		t.Fatal("erwartet sichtbare Fehlermeldung bei fehlgeschlagenem Transfer")
+	}
+}
+
+// AC2: Exportprotokoll ist je Lauf einsehbar, inkl. echter Testlaeufe.
+func TestHandleList_ShowsRealRuns(t *testing.T) {
+	srv, cleanup := newTestServer(t, false)
+	defer cleanup()
+	mux := http.NewServeMux()
+	srv.RegisterRoutes(mux)
+
+	triggerReq := httptest.NewRequest(http.MethodPost, "/datev/exports", bytes.NewReader(validTriggerBody()))
+	triggerReq.Header.Set("X-User-Id", "u1")
+	triggerReq.Header.Set("X-Tenant-Slug", "acme-list")
+	triggerRec := httptest.NewRecorder()
+	mux.ServeHTTP(triggerRec, triggerReq)
+	if triggerRec.Code != http.StatusCreated {
+		t.Fatalf("vorbereitung fehlgeschlagen: %d %s", triggerRec.Code, triggerRec.Body.String())
+	}
+
+	listURL := &url.URL{Path: "/datev/exports"}
+	listReq := httptest.NewRequest(http.MethodGet, listURL.String(), nil)
+	listReq.Header.Set("X-User-Id", "u1")
+	listReq.Header.Set("X-Tenant-Slug", "acme-list")
+	listRec := httptest.NewRecorder()
+	mux.ServeHTTP(listRec, listReq)
+
+	if listRec.Code != http.StatusOK {
+		t.Fatalf("erwartet 200, bekam %d", listRec.Code)
+	}
+	var runs []runResponse
+	if err := json.NewDecoder(listRec.Body).Decode(&runs); err != nil {
+		t.Fatalf("antwort dekodieren: %v", err)
+	}
+	if len(runs) == 0 {
+		t.Fatal("erwartet mindestens einen Exportlauf im Protokoll")
+	}
+	if runs[0].TransferStatus != string(datevtransfer.StatusSuccess) {
+		t.Fatalf("erwartet transfer-status success im Protokoll, bekam %q", runs[0].TransferStatus)
+	}
+}
+
+// Tenant isolation: another tenant's runs must not leak into this list.
+func TestHandleList_TenantIsolation(t *testing.T) {
+	srv, cleanup := newTestServer(t, false)
+	defer cleanup()
+	mux := http.NewServeMux()
+	srv.RegisterRoutes(mux)
+
+	triggerReq := httptest.NewRequest(http.MethodPost, "/datev/exports", bytes.NewReader(validTriggerBody()))
+	triggerReq.Header.Set("X-User-Id", "u1")
+	triggerReq.Header.Set("X-Tenant-Slug", "tenant-a-iso")
+	triggerRec := httptest.NewRecorder()
+	mux.ServeHTTP(triggerRec, triggerReq)
+	if triggerRec.Code != http.StatusCreated {
+		t.Fatalf("vorbereitung fehlgeschlagen: %d", triggerRec.Code)
+	}
+
+	listReq := httptest.NewRequest(http.MethodGet, "/datev/exports", nil)
+	listReq.Header.Set("X-User-Id", "u1")
+	listReq.Header.Set("X-Tenant-Slug", "tenant-b-iso")
+	listRec := httptest.NewRecorder()
+	mux.ServeHTTP(listRec, listReq)
+
+	var runs []runResponse
+	if err := json.NewDecoder(listRec.Body).Decode(&runs); err != nil {
+		t.Fatalf("antwort dekodieren: %v", err)
+	}
+	for _, r := range runs {
+		if r.ID == "" {
+			continue
+		}
+	}
+	// tenant-b-iso must see none of tenant-a-iso's runs.
+	if len(runs) != 0 {
+		t.Fatalf("mandantentrennung verletzt: tenant-b-iso sieht %d Laeufe eines fremden Mandanten", len(runs))
+	}
+}

connect/internal/datevexport/list.go

@@ -0,0 +1,31 @@
+package datevexport
+
+import (
+	"context"
+	"fmt"
+)
+
+// List returns a tenant's export runs, newest first — additive to
+// RunExport, used by DAT-03's protocol view. No change to RunExport.
+func (s *Store) List(ctx context.Context, tenantSlug string) ([]Run, error) {
+	rows, err := s.Pool.Query(ctx, `
+		SELECT id, tenant_slug, period_start, period_end, entry_count, retention_class, coalesce(archive_object_id, ''), created_at
+		FROM datev_exports
+		WHERE tenant_slug = $1
+		ORDER BY created_at DESC
+	`, tenantSlug)
+	if err != nil {
+		return nil, fmt.Errorf("datevexport: exportlaeufe auflisten: %w", err)
+	}
+	defer rows.Close()
+
+	var runs []Run
+	for rows.Next() {
+		var r Run
+		if err := rows.Scan(&r.ID, &r.TenantSlug, &r.PeriodStart, &r.PeriodEnd, &r.EntryCount, &r.RetentionClass, &r.ArchiveObjectID, &r.CreatedAt); err != nil {
+			return nil, fmt.Errorf("datevexport: exportlauf lesen: %w", err)
+		}
+		runs = append(runs, r)
+	}
+	return runs, rows.Err()
+}

connect/internal/datevtransfer/list.go

@@ -0,0 +1,32 @@
+package datevtransfer
+
+import (
+	"context"
+	"fmt"
+)
+
+// ListForTenant returns a tenant's transfers, newest first — additive to
+// Start/Retry/Get, used by DAT-03's protocol view to show transmission
+// status per export run. No change to existing methods.
+func (s *Store) ListForTenant(ctx context.Context, tenantSlug string) ([]Transfer, error) {
+	rows, err := s.Pool.Query(ctx, `
+		SELECT id, tenant_slug, export_run_id, status, attempt, coalesce(last_error, ''), retry_at, coalesce(transfer_ref, ''), created_at, updated_at
+		FROM datev_transfers
+		WHERE tenant_slug = $1
+		ORDER BY created_at DESC
+	`, tenantSlug)
+	if err != nil {
+		return nil, fmt.Errorf("datevtransfer: transfers auflisten: %w", err)
+	}
+	defer rows.Close()
+
+	var out []Transfer
+	for rows.Next() {
+		var t Transfer
+		if err := rows.Scan(&t.ID, &t.TenantSlug, &t.ExportRunID, &t.Status, &t.Attempt, &t.LastError, &t.RetryAt, &t.TransferRef, &t.CreatedAt, &t.UpdatedAt); err != nil {
+			return nil, fmt.Errorf("datevtransfer: transfer lesen: %w", err)
+		}
+		out = append(out, t)
+	}
+	return out, rows.Err()
+}

web/datev-export/.npmrc

@@ -0,0 +1 @@
+

web/datev-export/app/exports/page.test.tsx

@@ -0,0 +1,117 @@
+import { describe, expect, it, vi, afterEach } from "vitest";
+import { render, screen, waitFor, fireEvent } from "@testing-library/react";
+import { I18nProvider, ThemeProvider, ToastProvider } from "@nexarch/shl";
+import ExportsPage from "./page";
+import { UnauthorizedError } from "../../lib/api";
+
+vi.mock("../../lib/api", async () => {
+  const actual = await vi.importActual<typeof import("../../lib/api")>("../../lib/api");
+  return { ...actual, fetchExportRuns: vi.fn(), triggerExport: vi.fn() };
+});
+
+import { fetchExportRuns, triggerExport } from "../../lib/api";
+
+function renderPage() {
+  return render(
+    <ThemeProvider>
+      <I18nProvider initialLocale="de">
+        <ToastProvider>
+          <ExportsPage />
+        </ToastProvider>
+      </I18nProvider>
+    </ThemeProvider>
+  );
+}
+
+describe("ExportsPage", () => {
+  afterEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it("zeigt eine explizite Meldung ohne Anmeldung", async () => {
+    vi.mocked(fetchExportRuns).mockRejectedValue(new UnauthorizedError("nicht angemeldet"));
+    renderPage();
+    await waitFor(() => {
+      expect(screen.getByRole("alert").textContent).toContain("Anmeldung erforderlich");
+    });
+  });
+
+  // AC2: Exportprotokoll ist je Lauf einsehbar.
+  it("zeigt reale Testlaeufe im Protokoll an", async () => {
+    vi.mocked(fetchExportRuns).mockResolvedValue([
+      {
+        id: "run-1-abcdef",
+        period_start: "2026-03-01",
+        period_end: "2026-03-31",
+        entry_count: 3,
+        retention_class: "gobd_10y",
+        created_at: new Date().toISOString(),
+        transfer_status: "success",
+      },
+    ]);
+    renderPage();
+    await waitFor(() => {
+      expect(screen.getByText("Erfolgreich")).toBeTruthy();
+      expect(screen.getByText("2026-03-01 – 2026-03-31")).toBeTruthy();
+    });
+  });
+
+  // AC3 + Pruefung 3: fehlgeschlagener Testlauf ist visuell klar
+  // unterscheidbar (eigenes role="alert" Element, eigene Farbe/Text).
+  it("markiert einen fehlgeschlagenen Testlauf klar erkennbar", async () => {
+    vi.mocked(fetchExportRuns).mockResolvedValue([
+      {
+        id: "run-2-abcdef",
+        period_start: "2026-04-01",
+        period_end: "2026-04-30",
+        entry_count: 1,
+        retention_class: "gobd_10y",
+        created_at: new Date().toISOString(),
+        transfer_status: "failed",
+        transfer_error: "übertragung an datev-zielsystem abgelehnt",
+      },
+    ]);
+    renderPage();
+    await waitFor(() => {
+      expect(screen.getByText("Fehlgeschlagen")).toBeTruthy();
+      expect(screen.getByText("übertragung an datev-zielsystem abgelehnt")).toBeTruthy();
+    });
+  });
+
+  // AC1 + Pruefung 1: Export laesst sich ueber die Oberflaeche mit
+  // Zeitraum-Auswahl anstossen.
+  it("stoesst einen Export mit den eingegebenen Werten an", async () => {
+    vi.mocked(fetchExportRuns).mockResolvedValue([]);
+    vi.mocked(triggerExport).mockResolvedValue({
+      id: "run-new",
+      period_start: "2026-03-01",
+      period_end: "2026-03-31",
+      entry_count: 1,
+      retention_class: "gobd_10y",
+      created_at: new Date().toISOString(),
+      transfer_status: "success",
+    });
+    renderPage();
+
+    await waitFor(() => expect(screen.getByText("Noch keine Exportläufe.")).toBeTruthy());
+
+    fireEvent.change(screen.getByLabelText("Beraternummer"), { target: { value: "1001" } });
+    fireEvent.change(screen.getByLabelText("Mandantennummer"), { target: { value: "42" } });
+    fireEvent.change(screen.getByLabelText("Wirtschaftsjahresbeginn"), { target: { value: "2026-01-01" } });
+    fireEvent.change(screen.getByLabelText("Bezeichnung"), { target: { value: "März 2026" } });
+    fireEvent.change(screen.getByLabelText("Zeitraum von"), { target: { value: "2026-03-01" } });
+    fireEvent.change(screen.getByLabelText("Zeitraum bis"), { target: { value: "2026-03-31" } });
+    fireEvent.click(screen.getByText("Export anstoßen"));
+
+    await waitFor(() => {
+      expect(triggerExport).toHaveBeenCalledWith(
+        expect.objectContaining({
+          consultant_number: "1001",
+          client_number: "42",
+          period_start: "2026-03-01",
+          period_end: "2026-03-31",
+        })
+      );
+    });
+  });
+});

web/datev-export/app/exports/page.tsx

@@ -0,0 +1,222 @@
+"use client";
+
+import { useEffect, useState } from "react";
+import { Table, TextField, useToast, type TableColumn } from "@nexarch/shl";
+import {
+  ApiError,
+  ExportRun,
+  UnauthorizedError,
+  fetchExportRuns,
+  triggerExport,
+} from "../../lib/api";
+
+const TRANSFER_LABEL: Record<string, string> = {
+  success: "Erfolgreich",
+  failed: "Fehlgeschlagen",
+  retry_pending: "Wiederholung ausstehend",
+  pending: "Ausstehend",
+};
+
+function transferColor(status?: string): string {
+  switch (status) {
+    case "success":
+      return "var(--shl-color-success, #1a7f37)";
+    case "failed":
+      return "var(--shl-color-danger, #c02020)";
+    case "retry_pending":
+      return "var(--shl-color-warning, #9a6700)";
+    default:
+      return "var(--shl-color-text-secondary, #57606a)";
+  }
+}
+
+interface FormState {
+  consultantNumber: string;
+  clientNumber: string;
+  fiscalYearStart: string;
+  accountLength: string;
+  description: string;
+  periodStart: string;
+  periodEnd: string;
+}
+
+const emptyForm: FormState = {
+  consultantNumber: "",
+  clientNumber: "",
+  fiscalYearStart: "",
+  accountLength: "4",
+  description: "",
+  periodStart: "",
+  periodEnd: "",
+};
+
+export default function ExportsPage() {
+  const { push } = useToast();
+  const [runs, setRuns] = useState<ExportRun[] | null>(null);
+  const [unauthorized, setUnauthorized] = useState(false);
+  const [loadError, setLoadError] = useState<string | null>(null);
+  const [form, setForm] = useState<FormState>(emptyForm);
+  const [submitting, setSubmitting] = useState(false);
+
+  function load() {
+    fetchExportRuns()
+      .then((r) => {
+        setRuns(r);
+        setUnauthorized(false);
+      })
+      .catch((err) => {
+        if (err instanceof UnauthorizedError) {
+          setUnauthorized(true);
+          return;
+        }
+        const message = err instanceof ApiError || err instanceof Error ? err.message : "Exportprotokoll konnte nicht geladen werden.";
+        setLoadError(message);
+        push(message, "danger");
+      });
+  }
+
+  useEffect(load, []);
+
+  async function handleSubmit(e: React.FormEvent) {
+    e.preventDefault();
+    setSubmitting(true);
+    try {
+      await triggerExport({
+        consultant_number: form.consultantNumber,
+        client_number: form.clientNumber,
+        fiscal_year_start: form.fiscalYearStart,
+        account_length: Number(form.accountLength),
+        description: form.description,
+        period_start: form.periodStart,
+        period_end: form.periodEnd,
+        // Belegauswahl aus DMS ist nicht Bestandteil dieser Kachel (siehe
+        // Nicht-Bestandteil/QA-03) — ein Testbeleg demonstriert den
+        // vollstaendigen Anstoss-bis-Protokoll-Weg.
+        entries: [
+          {
+            Amount: 1,
+            DebitCredit: "S",
+            Account: "1200",
+            CounterAccount: "4400",
+            Date: new Date(form.periodStart || Date.now()).toISOString(),
+            Text: "Testbeleg (manueller Anstoss)",
+            DocumentRef: `manuell-${Date.now()}`,
+          },
+        ],
+      });
+      push("Export angestossen.", "success");
+      load();
+    } catch (err) {
+      const message = err instanceof ApiError || err instanceof Error ? err.message : "Export konnte nicht angestossen werden.";
+      push(message, "danger");
+    } finally {
+      setSubmitting(false);
+    }
+  }
+
+  if (unauthorized) {
+    return (
+      <main style={{ maxWidth: 960, margin: "40px auto", padding: "0 16px" }}>
+        <p role="alert">Anmeldung erforderlich, um DATEV-Exporte zu sehen.</p>
+      </main>
+    );
+  }
+
+  const columns: TableColumn<ExportRun>[] = [
+    { key: "id", header: "Lauf", render: (r) => r.id.slice(0, 8) },
+    { key: "period", header: "Zeitraum", render: (r) => `${r.period_start} – ${r.period_end}` },
+    { key: "entry_count", header: "Belege", render: (r) => String(r.entry_count) },
+    {
+      key: "transfer_status",
+      header: "Übertragungsstatus",
+      render: (r) =>
+        r.transfer_status ? (
+          <span style={{ color: transferColor(r.transfer_status), fontWeight: 600 }} role={r.transfer_status === "failed" ? "alert" : undefined}>
+            {TRANSFER_LABEL[r.transfer_status] ?? r.transfer_status}
+          </span>
+        ) : (
+          <span style={{ color: "var(--shl-color-text-secondary, #57606a)" }}>—</span>
+        ),
+    },
+    {
+      key: "transfer_error",
+      header: "Fehlerdiagnose",
+      render: (r) => (r.transfer_error ? <span role="status">{r.transfer_error}</span> : "—"),
+    },
+    {
+      key: "created_at",
+      header: "Erstellt",
+      render: (r) => new Date(r.created_at).toLocaleString("de-DE"),
+    },
+  ];
+
+  return (
+    <main style={{ maxWidth: 960, margin: "40px auto", padding: "0 16px" }}>
+      <h1>DATEV-Export</h1>
+
+      <form onSubmit={handleSubmit} style={{ marginBottom: 32, display: "flex", flexDirection: "column", gap: 12, maxWidth: 480 }}>
+        <TextField
+          label="Beraternummer"
+          value={form.consultantNumber}
+          onChange={(e) => setForm({ ...form, consultantNumber: e.target.value })}
+          required
+        />
+        <TextField
+          label="Mandantennummer"
+          value={form.clientNumber}
+          onChange={(e) => setForm({ ...form, clientNumber: e.target.value })}
+          required
+        />
+        <TextField
+          label="Wirtschaftsjahresbeginn"
+          type="date"
+          value={form.fiscalYearStart}
+          onChange={(e) => setForm({ ...form, fiscalYearStart: e.target.value })}
+          required
+        />
+        <TextField
+          label="Sachkontenlänge"
+          type="number"
+          value={form.accountLength}
+          onChange={(e) => setForm({ ...form, accountLength: e.target.value })}
+          required
+        />
+        <TextField
+          label="Bezeichnung"
+          value={form.description}
+          onChange={(e) => setForm({ ...form, description: e.target.value })}
+          required
+        />
+        <TextField
+          label="Zeitraum von"
+          type="date"
+          value={form.periodStart}
+          onChange={(e) => setForm({ ...form, periodStart: e.target.value })}
+          required
+        />
+        <TextField
+          label="Zeitraum bis"
+          type="date"
+          value={form.periodEnd}
+          onChange={(e) => setForm({ ...form, periodEnd: e.target.value })}
+          required
+        />
+        <button type="submit" disabled={submitting}>
+          {submitting ? "Wird angestossen …" : "Export anstoßen"}
+        </button>
+      </form>
+
+      <h2>Exportprotokoll</h2>
+      {loadError && <p role="alert">{loadError}</p>}
+      {runs && runs.length === 0 && <p>Noch keine Exportläufe.</p>}
+      {runs && runs.length > 0 && (
+        <Table
+          columns={columns}
+          rows={runs}
+          rowKey={(r) => r.id}
+          caption="Protokoll aller DATEV-Exportläufe mit Übertragungsstatus"
+        />
+      )}
+    </main>
+  );
+}

web/datev-export/app/layout.tsx

@@ -0,0 +1,37 @@
+import Script from "next/script";
+import { ThemeProvider, I18nProvider, ToastProvider, typography, themeInitScript, focusVisibleStyles } from "@nexarch/shl";
+
+export const metadata = {
+  title: "NEXARCH DATEV-Export",
+};
+
+export default function RootLayout({
+  children,
+}: {
+  children: React.ReactNode;
+}) {
+  return (
+    <html lang="de">
+      <head>
+        <style>{focusVisibleStyles}</style>
+        <Script id="shl-theme-init" strategy="beforeInteractive">
+          {themeInitScript()}
+        </Script>
+      </head>
+      <body
+        style={{
+          fontFamily: typography.fontFamily,
+          margin: 0,
+          background: "var(--shl-color-background, #ffffff)",
+          color: "var(--shl-color-text-primary, #14181f)",
+        }}
+      >
+        <ThemeProvider>
+          <I18nProvider initialLocale="de">
+            <ToastProvider>{children}</ToastProvider>
+          </I18nProvider>
+        </ThemeProvider>
+      </body>
+    </html>
+  );
+}

web/datev-export/app/page.tsx

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+import { redirect } from "next/navigation";
+
+export default function IndexPage() {
+  redirect("/exports");
+}

web/datev-export/lib/api.ts

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+// Duenner Client fuer DAT-03 (connect/internal/datevapi) — enthaelt keine
+// eigene Geschaeftslogik, nur Datenabruf/-versand. Identitaet kommt
+// uebergangsweise (wie bei web/connect-status) aus Umgebungsvariablen,
+// die als Header durchgereicht werden.
+
+export class UnauthorizedError extends Error {}
+export class ApiError extends Error {}
+
+function apiBase(): string {
+  const base = process.env.NEXT_PUBLIC_CONNECT_API_URL;
+  if (!base) {
+    throw new Error("NEXT_PUBLIC_CONNECT_API_URL ist nicht gesetzt (Umgebungsvariable erforderlich)");
+  }
+  return base;
+}
+
+function identityHeaders(): Record<string, string> {
+  const userID = process.env.NEXT_PUBLIC_USER_ID;
+  const tenant = process.env.NEXT_PUBLIC_TENANT_SLUG;
+  const headers: Record<string, string> = {};
+  if (userID) headers["X-User-Id"] = userID;
+  if (tenant) headers["X-Tenant-Slug"] = tenant;
+  return headers;
+}
+
+async function req<T>(path: string, init?: RequestInit): Promise<T> {
+  const res = await fetch(`${apiBase()}${path}`, {
+    ...init,
+    headers: {
+      "Content-Type": "application/json",
+      ...identityHeaders(),
+      ...init?.headers,
+    },
+  });
+  if (res.status === 401) {
+    throw new UnauthorizedError("Anmeldung erforderlich, um DATEV-Exporte zu sehen.");
+  }
+  if (!res.ok) {
+    const body = await res.json().catch(() => ({}));
+    throw new ApiError(body.error ?? `Anfrage fehlgeschlagen (${res.status})`);
+  }
+  return res.json().catch(() => undefined as T);
+}
+
+export interface ExportEntry {
+  Amount: number;
+  DebitCredit: "S" | "H";
+  Account: string;
+  CounterAccount: string;
+  Date: string;
+  Text: string;
+  DocumentRef: string;
+}
+
+export interface TriggerExportRequest {
+  consultant_number: string;
+  client_number: string;
+  fiscal_year_start: string;
+  account_length: number;
+  description: string;
+  period_start: string;
+  period_end: string;
+  entries: ExportEntry[];
+}
+
+export interface ExportRun {
+  id: string;
+  period_start: string;
+  period_end: string;
+  entry_count: number;
+  retention_class: string;
+  created_at: string;
+  transfer_status?: string;
+  transfer_error?: string;
+}
+
+export function triggerExport(req_: TriggerExportRequest): Promise<ExportRun> {
+  return req("/datev/exports", { method: "POST", body: JSON.stringify(req_) });
+}
+
+export function fetchExportRuns(): Promise<ExportRun[]> {
+  return req("/datev/exports");
+}

web/datev-export/next.config.mjs

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+/** @type {import('next').NextConfig} */
+const nextConfig = {
+  transpilePackages: ["@nexarch/shl"],
+};
+export default nextConfig;

web/datev-export/package.json

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+{
+  "name": "nexarch-datev-export",
+  "private": true,
+  "scripts": {
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "test": "vitest run"
+  },
+  "dependencies": {
+    "@nexarch/shl": "file:../shl",
+    "next": "16.3.5",
+    "react": "19.3.0",
+    "react-dom": "19.3.0"
+  },
+  "devDependencies": {
+    "@testing-library/jest-dom": "^7.0.1",
+    "@testing-library/react": "16.3.3",
+    "@types/node": "^22.20.4",
+    "@types/react": "19.3.0",
+    "@types/react-dom": "19.3.0",
+    "jsdom": "24.1.0",
+    "typescript": "5.5.3",
+    "vitest": "^5.0.1"
+  }
+}

web/datev-export/tsconfig.json

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+{
+  "compilerOptions": {
+    "target": "ES2017",
+    "lib": ["dom", "dom.iterable", "esnext"],
+    "allowJs": false,
+    "skipLibCheck": true,
+    "strict": true,
+    "noEmit": true,
+    "esModuleInterop": true,
+    "module": "esnext",
+    "moduleResolution": "bundler",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "jsx": "react-jsx",
+    "incremental": true,
+    "plugins": [{ "name": "next" }],
+    "paths": { "@/*": ["./*"] }
+  },
+  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts", ".next/dev/types/**/*.ts"],
+  "exclude": ["node_modules"]
+}

web/datev-export/vitest.config.ts

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+import { defineConfig } from "vitest/config";
+
+export default defineConfig({
+  test: {
+    environment: "jsdom",
+    setupFiles: ["./vitest.setup.ts"],
+  },
+});

web/datev-export/vitest.setup.ts

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+import "@testing-library/jest-dom/vitest";
+import { afterEach } from "vitest";
+import { cleanup } from "@testing-library/react";
+
+afterEach(cleanup);