feat(admin): Provider & Sprache — Eigener-Wert-Eingabe + Tests (v14)

app.js: default_stt/llm/tts_provider und default_language von 'select'
auf 'combo' umgestellt, damit neben den vordefinierten Optionen jederzeit
ein beliebiger eigener Wert eingegeben werden kann (Zukunftssicherheit).
combo-Renderer unterstützt jetzt auch meta.labels (Sprachkürzel → Klarname).
tests/test_admin_settings.py: 28 Tests für GET/PUT/DELETE /api/admin/config —
Auth, bekannte Werte, Custom-Values, Persistenz, Runtime-Wirkung.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/test_admin_settings.py

@@ -0,0 +1,191 @@
+"""Tests für den Admin-Einstellungen-Tab (Provider & Sprache + Laufzeit-Config).
+
+Getestet: GET /api/admin/config, PUT /api/admin/config/{key},
+          DELETE /api/admin/config/{key} — Auth, Custom-Values, Persistenz.
+"""
+
+import pytest
+from fastapi.testclient import TestClient
+
+import app.dependencies as deps
+from app.main import app
+from app.config import settings
+from app.runtime_config import RUNTIME_SETTABLE, invalidate_cache
+
+client = TestClient(app)
+ADMIN = "test-admin-key"
+ADM_HDR = {"X-Admin-Key": ADMIN}
+
+PROVIDER_KEYS = [
+    "default_stt_provider",
+    "default_llm_provider",
+    "default_tts_provider",
+    "default_language",
+]
+
+
+@pytest.fixture(autouse=True)
+def _setup(monkeypatch):
+    monkeypatch.setattr(settings, "admin_api_key", ADMIN)
+    monkeypatch.setattr(settings, "auth_enabled", False)
+    invalidate_cache()
+    yield
+    invalidate_cache()
+
+
+# ── GET /api/admin/config ────────────────────────────────────────────────────
+
+def test_get_config_returns_all_keys():
+    resp = client.get("/api/admin/config", headers=ADM_HDR)
+    assert resp.status_code == 200
+    keys = {e["key"] for e in resp.json()}
+    assert keys == set(RUNTIME_SETTABLE.keys())
+
+
+def test_get_config_requires_admin_key():
+    resp = client.get("/api/admin/config")
+    assert resp.status_code == 401
+
+
+def test_get_config_provider_keys_present():
+    resp = client.get("/api/admin/config", headers=ADM_HDR)
+    keys = {e["key"] for e in resp.json()}
+    for k in PROVIDER_KEYS:
+        assert k in keys, f"Schlüssel {k!r} fehlt in /api/admin/config"
+
+
+def test_get_config_entry_structure():
+    resp = client.get("/api/admin/config", headers=ADM_HDR)
+    entry = next(e for e in resp.json() if e["key"] == "default_stt_provider")
+    assert "label" in entry
+    assert "hint" in entry
+    assert "effective_value" in entry
+    assert "base_value" in entry
+    assert "is_overridden" in entry
+    assert entry["is_overridden"] is False
+
+
+def test_get_config_not_overridden_initially():
+    resp = client.get("/api/admin/config", headers=ADM_HDR)
+    for entry in resp.json():
+        if entry["key"] in PROVIDER_KEYS:
+            assert not entry["is_overridden"], (
+                f"{entry['key']} sollte initial nicht überschrieben sein"
+            )
+
+
+# ── PUT /api/admin/config/{key} ──────────────────────────────────────────────
+
+@pytest.mark.parametrize("key,value", [
+    ("default_stt_provider",  "openrouter"),
+    ("default_stt_provider",  "faster-whisper"),
+    ("default_llm_provider",  "openrouter"),
+    ("default_llm_provider",  "local-openai-compatible"),
+    ("default_tts_provider",  "openrouter"),
+    ("default_tts_provider",  "piper"),
+    ("default_tts_provider",  "chatterbox"),
+    ("default_language",      "de"),
+    ("default_language",      "en"),
+])
+def test_put_known_value_accepted(key, value):
+    resp = client.put(f"/api/admin/config/{key}", headers=ADM_HDR, json={"value": value})
+    assert resp.status_code == 200
+    assert resp.json()["value"] == value
+
+
+@pytest.mark.parametrize("key,custom_value", [
+    ("default_stt_provider", "my-custom-stt"),
+    ("default_llm_provider", "local-openai-compatible-v2"),
+    ("default_tts_provider", "future-tts-engine"),
+    ("default_language",     "pl"),
+])
+def test_put_custom_value_accepted(key, custom_value):
+    """Eigener Wert (nicht in der Dropdown-Liste) muss akzeptiert werden."""
+    resp = client.put(f"/api/admin/config/{key}", headers=ADM_HDR, json={"value": custom_value})
+    assert resp.status_code == 200
+    assert resp.json()["value"] == custom_value
+
+
+def test_put_custom_value_reflected_in_get():
+    """Gespeicherter Custom-Wert erscheint in effective_value."""
+    client.put("/api/admin/config/default_stt_provider", headers=ADM_HDR,
+               json={"value": "my-new-stt"})
+    invalidate_cache()
+    resp = client.get("/api/admin/config", headers=ADM_HDR)
+    entry = next(e for e in resp.json() if e["key"] == "default_stt_provider")
+    assert entry["effective_value"] == "my-new-stt"
+    assert entry["is_overridden"] is True
+
+
+def test_put_unknown_key_returns_400():
+    resp = client.put("/api/admin/config/nonexistent_key", headers=ADM_HDR,
+                      json={"value": "x"})
+    assert resp.status_code == 400
+
+
+def test_put_trims_whitespace():
+    resp = client.put("/api/admin/config/default_stt_provider", headers=ADM_HDR,
+                      json={"value": "  openrouter  "})
+    assert resp.status_code == 200
+    assert resp.json()["value"] == "openrouter"
+
+
+def test_put_requires_admin_key():
+    resp = client.put("/api/admin/config/default_stt_provider", json={"value": "x"})
+    assert resp.status_code == 401
+
+
+# ── DELETE /api/admin/config/{key} ──────────────────────────────────────────
+
+def test_delete_removes_override():
+    client.put("/api/admin/config/default_tts_provider", headers=ADM_HDR,
+               json={"value": "future-engine"})
+    invalidate_cache()
+
+    del_resp = client.delete("/api/admin/config/default_tts_provider", headers=ADM_HDR)
+    assert del_resp.status_code == 200
+    assert del_resp.json()["deleted"] == "default_tts_provider"
+
+    invalidate_cache()
+    cfg = {e["key"]: e for e in
+           client.get("/api/admin/config", headers=ADM_HDR).json()}
+    assert not cfg["default_tts_provider"]["is_overridden"]
+
+
+def test_delete_nonexistent_override_returns_404():
+    resp = client.delete("/api/admin/config/default_tts_provider", headers=ADM_HDR)
+    assert resp.status_code == 404
+
+
+def test_delete_unknown_key_returns_400():
+    resp = client.delete("/api/admin/config/does_not_exist", headers=ADM_HDR)
+    assert resp.status_code == 400
+
+
+def test_delete_requires_admin_key():
+    resp = client.delete("/api/admin/config/default_tts_provider")
+    assert resp.status_code == 401
+
+
+# ── Persistenz: Override wirkt sich auf Runtime aus ──────────────────────────
+
+def test_override_reflected_in_runtime_settings():
+    from app.runtime_config import runtime_settings
+    client.put("/api/admin/config/default_language", headers=ADM_HDR,
+               json={"value": "fr"})
+    invalidate_cache()
+    assert runtime_settings.default_language == "fr"
+
+
+def test_delete_restores_base_value():
+    from app.runtime_config import runtime_settings
+    base = str(settings.default_language)
+
+    client.put("/api/admin/config/default_language", headers=ADM_HDR,
+               json={"value": "it"})
+    invalidate_cache()
+    assert runtime_settings.default_language == "it"
+
+    client.delete("/api/admin/config/default_language", headers=ADM_HDR)
+    invalidate_cache()
+    assert str(runtime_settings.default_language) == base