Phase 12: Test-Suite (30 pytest-Tests) + CLAUDE.md aktualisiert

tests/:
  conftest.py        - minimale Env-Vars + sys.path-Setup
  test_auth.py       - Magic-Token + JWT Round-Trip (4 Tests)
  test_audit.py      - diff() + _to_json() Helper (8 Tests)
  test_models.py     - Pydantic-Validierung (7 Tests)
  test_source_meta.py - Single Source of Truth Konsistenz (7 Tests)
  test_imports.py    - alle Backend-Module importierbar (4 Tests)

requirements-dev.txt: pytest, ftfy, pyflakes

Tests sind reine Unit-Tests (kein DB-Zugriff, kein HTTP-Server),
laufen in <0.5s, geben sofortiges Catch-Net fuer Syntax/Import-Bugs.

Aufruf: PYTHONPATH=src ./venv/bin/python -m pytest tests/ -v

CLAUDE.md erweitert um:
- Sektion Tests (Framework, Pfad, Ausfuehrung)
- Sektion Phasen-Historie (alle 12 Phasen der Aufraeum-Aktion 2026-05-09
  mit kurzer Erklaerung)

tests/test_source_meta.py

@@ -0,0 +1,51 @@
+"""Tests fuer src/source_meta.py - Single Source of Truth fuer Kategorien/Typen."""
+from source_meta import (
+    SOURCE_CATEGORIES, SOURCE_TYPES,
+    get_meta, category_label, type_label,
+)
+
+
+def test_categories_have_unique_keys():
+    keys = [c["key"] for c in SOURCE_CATEGORIES]
+    assert len(keys) == len(set(keys))
+
+
+def test_types_have_unique_keys():
+    keys = [t["key"] for t in SOURCE_TYPES]
+    assert len(keys) == len(set(keys))
+
+
+def test_categories_and_types_have_label():
+    for c in SOURCE_CATEGORIES:
+        assert "key" in c and "label" in c
+        assert isinstance(c["label"], str) and c["label"]
+    for t in SOURCE_TYPES:
+        assert "key" in t and "label" in t
+
+
+def test_get_meta_shape():
+    meta = get_meta()
+    assert set(meta.keys()) == {"categories", "types"}
+    assert meta["categories"] == SOURCE_CATEGORIES
+    assert meta["types"] == SOURCE_TYPES
+
+
+def test_category_label_lookup():
+    assert category_label("nachrichtenagentur") == "Nachrichtenagentur"
+    assert category_label("oeffentlich-rechtlich") == "Öffentlich-Rechtlich"
+    # Unbekannter key -> Fallback auf key selbst
+    assert category_label("does-not-exist") == "does-not-exist"
+
+
+def test_type_label_lookup():
+    assert type_label("rss_feed") == "RSS-Feed"
+    assert type_label("telegram_channel") == "Telegram-Kanal"
+    assert type_label("does-not-exist") == "does-not-exist"
+
+
+def test_category_includes_aktuelle_themen():
+    """Phase 3b: Lagen-spezifische Kategorien (cybercrime etc.) müssen drin sein."""
+    keys = {c["key"] for c in SOURCE_CATEGORIES}
+    assert "cybercrime" in keys
+    assert "ukraine-russland-krieg" in keys
+    assert "russische-staatspropaganda" in keys