Sprint 8: Excel-Import-Skript + CI Frontend-Build-Job

Import-Skript (backend/scripts/import_excel.py) liest die drei Ist-Listen
per stdlib zipfile/ElementTree (kein openpyxl), erzeugt idempotent
Objekttyp+Beladungsvorlage+Vorlagenpositionen je Datei, Material-Abgleich
über Artikelnummer. Rohdaten-Check bestätigt Mapping D=Artikelnummer
(testphasen.md ergänzt). Ausführung nur auf Zielsystem (Deployment-Regel).

CI: neuer frontend-build-Job (npm install + tsc --noEmit + vite build),
da React-PWA/Flutter bisher unabhängig von der Test-Pipeline waren.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01L85hmKbvX7Cqkq47KnQhFt

DEVLOG.md

@@ -1406,3 +1406,41 @@ Keine Commits in dieser Session.
 - backend/tests/test_email.py                         |  68 +++++++++++++++++++++++++++++++
 
 ---
+## 2026-09-04 00:00 – 00:10 (10m)
+**Beschreibung:** Claude Code Session
+**Projekt:** asb-material
+
+### Commits
+- 564e98e Sprint 7: React-PWA-Frontend (Offline-Härtung) + Flutter-Android-Grundgerüst
+
+### Geänderte Dateien
+- DEVLOG.md                                       |  56 +++++++++++++++
+- flutter_app/.gitignore                          |   8 +++
+- flutter_app/README.md                           |  40 +++++++++++
+- flutter_app/analysis_options.yaml               |   1 +
+- flutter_app/lib/api/api_client.dart             | 101 ++++++++++++++++++++++++++
+- flutter_app/lib/main.dart                       |  45 ++++++++++++
+- flutter_app/lib/screens/kontroll_screen.dart    | 276 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+- flutter_app/lib/screens/login_screen.dart       |  75 +++++++++++++++++++
+- flutter_app/lib/screens/objekt_list_screen.dart |  82 +++++++++++++++++++++
+- flutter_app/pubspec.yaml                        |  21 ++++++
+- frontend/.gitignore                             |   5 ++
+- frontend/README.md                              |  44 ++++++++++++
+- frontend/example.env                            |   1 +
+- frontend/index.html                             |  13 ++++
+- frontend/package.json                           |  25 +++++++
+- frontend/src/App.tsx                            |  42 +++++++++++
+- frontend/src/api/client.ts                      |  79 ++++++++++++++++++++
+- frontend/src/api/types.ts                       |  49 +++++++++++++
+- frontend/src/auth/AuthContext.tsx               |  41 +++++++++++
+- frontend/src/main.tsx                           |  13 ++++
+- frontend/src/offline/queue.ts                   | 114 +++++++++++++++++++++++++++++
+- frontend/src/offline/useOnlineStatus.ts         |  37 ++++++++++
+- frontend/src/pages/KontrollPage.tsx             | 271 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+- frontend/src/pages/LoginPage.tsx                |  62 ++++++++++++++++
+- frontend/src/pages/ObjektListPage.tsx           |  59 +++++++++++++++
+- frontend/src/vite-env.d.ts                      |   9 +++
+- frontend/tsconfig.json                          |  19 +++++
+- frontend/vite.config.ts                         |  36 ++++++++++
+
+---