feat: API fuer Szenario-Ende-Modifikator und szenario-eigene Einmalzahlungen

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

finance/tests/test_crud_api.py

@@ -186,3 +186,46 @@ def test_patch_transaction_category(client):
     r = client.patch(f"/api/transactions/{tx_id}", headers=H,
                      json={"category_id": 9999})
     assert r.status_code == 404
+
+
+def test_scenario_patch_beschreibung_leeren(client):
+    sc = client.post("/api/scenarios", headers=H, json={"name": "DescNull", "description": "x"}).json()
+    r = client.patch(f"/api/scenarios/{sc['id']}", headers=H, json={"description": None})
+    assert r.status_code == 200 and r.json()["description"] == ""
+
+
+def test_modifier_ende_validierung(client, db):
+    sc = client.post("/api/scenarios", headers=H, json={"name": "EndeVal"}).json()
+    # ende ohne Datum -> 422
+    r = client.post(f"/api/scenarios/{sc['id']}/modifiers", headers=H, json={
+        "target_type": "recurring", "target_id": 1, "kind": "ende"})
+    assert r.status_code == 422
+    # ende mit Datum -> 201, end_date in der Antwort
+    r = client.post(f"/api/scenarios/{sc['id']}/modifiers", headers=H, json={
+        "target_type": "recurring", "target_id": 1, "kind": "ende",
+        "end_date": "2026-08-31"})
+    assert r.status_code == 201
+    assert r.json()["end_date"] == "2026-08-31"
+    # andere Arten nullen end_date
+    r = client.post(f"/api/scenarios/{sc['id']}/modifiers", headers=H, json={
+        "target_type": "recurring", "target_id": 1, "kind": "remove",
+        "end_date": "2026-08-31"})
+    assert r.status_code == 201 and r.json()["end_date"] is None
+
+
+def test_scenario_planned_crud_und_cleanup(client, db):
+    sc = client.post("/api/scenarios", headers=H, json={"name": "SPI-CRUD"}).json()
+    r = client.post(f"/api/scenarios/{sc['id']}/planned", headers=H, json={
+        "name": "Sonderzahlung", "amount": "5000.00", "due": "2026-07-30"})
+    assert r.status_code == 201
+    item = r.json()
+    assert item["scenario_id"] == sc["id"] and item["amount"] == "5000.00"
+    assert client.get(f"/api/scenarios/{sc['id']}/planned", headers=H).json()[0]["name"] == "Sonderzahlung"
+    # DELETE mit fremder scenario_id -> 404
+    other = client.post("/api/scenarios", headers=H, json={"name": "SPI-Other"}).json()
+    assert client.delete(f"/api/scenarios/{other['id']}/planned/{item['id']}",
+                         headers=H).status_code == 404
+    # Szenario loeschen raeumt Einmalzahlungen mit ab (kein FK-Fehler):
+    assert client.delete(f"/api/scenarios/{sc['id']}", headers=H).status_code == 204
+    from app.models.tables import ScenarioPlannedItem
+    assert db.query(ScenarioPlannedItem).count() == 0

finance/tests/test_planning_api.py

@@ -34,6 +34,29 @@ def test_scenario_projection(client, db):
     assert len(body["series"]) == 92
 
 
+def test_projektion_mit_ende_modifier_und_szenario_einmalzahlung(client, db):
+    _seed_balance(db)
+    rec = client.post("/api/recurring", headers=H, json={
+        "name": "Miete-Proj", "amount": "-1000.00", "rhythm": "monthly",
+        "due_day": 1}).json()
+    sc = client.post("/api/scenarios", headers=H,
+                     json={"name": "BestCase-Test", "include_planned": False}).json()
+    client.post(f"/api/scenarios/{sc['id']}/modifiers", headers=H, json={
+        "target_type": "recurring", "target_id": rec["id"], "kind": "ende",
+        "end_date": "2026-08-31"})
+    client.post(f"/api/scenarios/{sc['id']}/planned", headers=H, json={
+        "name": "Zufluss", "amount": "5000.00", "due": "2026-07-30"})
+    r = client.post(f"/api/scenarios/{sc['id']}/project", headers=H,
+                    params={"horizon_days": 150, "start_date": "2026-07-15"})
+    assert r.status_code == 200
+    series = {p["day"]: Decimal(p["balance"]) for p in r.json()["series"]}
+    # Start 1000; +5000 am 30.07.; Miete nur noch am 01.08. (ende 31.08.);
+    # include_planned=False, aber die SZENARIO-Zahlung zaehlt trotzdem.
+    assert series["2026-07-30"] == Decimal("6000.00")
+    assert series["2026-08-01"] == Decimal("5000.00")
+    assert series["2026-12-01"] == Decimal("5000.00")  # keine Miete mehr ab Sept.
+
+
 def test_loan_in_scenario_keeps_balance_positive(client, db):
     _seed_balance(db)
     client.post("/api/recurring", headers=H, json={