feat(editor): editor prestatii unificat in modal - un select, un rand de chips (PRD 5.23)

Inlocuieste cele 3 controale de asociere cod RAR cu un singur rand de chips
+ un singur select care adauga instant la change. Stare = un hidden chips_state
JSON versionat; post_form_chips redus la 2 actiuni (add/remove). Optgroup
Sugestii (fuzzy/k-NN) + optiune "Nu se declara la RAR" in select, cu tinta
implicita evidentiata si placeholder care o numeste. exclus persistat prin
payload_json (treapta noua de precedenta in resolve_prestatii, round-trip complet).

Siguranta: itemii exclusi sunt scosi din payload la momentul trimiterii
(worker split_prestatii_excluse inainte de build_rar_payload + filtru defensiv),
ca sa nu ajunga NICIODATA la RAR ca codPrestatie:null.

Suita: 1680 passed, 1 skipped.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tests/test_payload.py

@@ -100,3 +100,35 @@ def test_normalizare_vin_nrinm_in_payload():
 
 def test_sistem_reparat_default_null():
     assert build_rar_payload(_internal())["sistemReparat"] == "null"
+
+
+def test_item_exclus_nu_apare_in_payload():
+    """Un item adnotat exclus=True nu produce niciodata {codPrestatie: null} la RAR."""
+    internal = {
+        "vin": "WVWZZZ1KZAW000123",
+        "nr_inmatriculare": "B999TST",
+        "data_prestatie": "2026-06-15",
+        "odometru_final": "123456",
+        "prestatii": [
+            {"cod_prestatie": "OE-1"},
+            {"cod_prestatie": None, "cod_op_service": "200", "denumire": "Spalare", "exclus": True},
+        ],
+    }
+    p = build_rar_payload(internal)
+    assert p["prestatii"] == [{"codPrestatie": "OE-1", "idPrezentare": None}]
+
+
+def test_item_fara_cod_prestatie_nu_apare_in_payload():
+    """Defense-in-depth: orice item fara cod (chiar neadnotat exclus) e sarit, niciodata null."""
+    internal = {
+        "vin": "WVWZZZ1KZAW000123",
+        "nr_inmatriculare": "B999TST",
+        "data_prestatie": "2026-06-15",
+        "odometru_final": "123456",
+        "prestatii": [
+            {"cod_prestatie": "OE-1"},
+            {"cod_prestatie": None, "cod_op_service": "200"},
+        ],
+    }
+    p = build_rar_payload(internal)
+    assert p["prestatii"] == [{"codPrestatie": "OE-1", "idPrezentare": None}]