feat(5.20): US-010 badge mediu RAR in liste/preview/detaliu/jurnal + audit + ecou API

labels.py: ETICHETE_ENV + eticheta_env(env)->(text,css). Productie afisata
"PRODUCȚIE" (majuscule+diacritice) cu badge fill de atentie (--err), Testare
outline discret muted — semnalizare risc L.142 (declaratie reala ireversibila).
Clase .env-badge-prod / .env-badge-test in base.html; eticheta_env expus ca
global Jinja.

Badge de mediu per rand in _submissions, _coada implicit prin view, _preview_rand,
_trimitere_detaliu, _jurnal. Statusbar (_status.html) aliniat la aceeasi conventie
(Productie = atentie, nu verde) — inlocuieste culorile ad-hoc din US-011, toggle
neatins.

rar_env in exportul de audit (AUDIT_COLUMNS + _audit_rows) si ecou in
GET /v1/prezentari(/{id}). _submission_row_view/_detaliu_ctx/fragment_submissions
duc rar_env pana in template.

tests/test_badge_rar_env.py: badge in lista, audit contine rar_env, GET ecou rar_env.
test_statusbar_env: asertie aliniata la eticheta PRODUCȚIE.

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

app/api/v1/router.py

@@ -556,6 +556,8 @@ AUDIT_COLUMNS = [
     "odometru_final",
     "prestatii",
     "rar_status_code",
+    # US-010 (PRD 5.20): mediul RAR tinta per trimitere.
+    "rar_env",
     "created_at",
     "updated_at",
     "purge_after",
@@ -571,7 +573,7 @@ def _audit_rows(conn, date_from: str | None, date_to: str | None, status: str, a
     scope_sql, scope_params = account_scope_clause(account_id)
     sql = (
         "SELECT id, status, id_prezentare, account_id, payload_json, rar_status_code, "
-        "created_at, updated_at, purge_after FROM submissions"
+        "rar_env, created_at, updated_at, purge_after FROM submissions"
     )
     where = [scope_sql]
     params: list = list(scope_params)
@@ -609,6 +611,8 @@ def _audit_rows(conn, date_from: str | None, date_to: str | None, status: str, a
             "odometru_final": p.get("odometru_final") or "",
             "prestatii": codes,
             "rar_status_code": r["rar_status_code"] or "",
+            # US-010 (PRD 5.20): mediul RAR tinta — coloana audit.
+            "rar_env": r["rar_env"] or "",
             "created_at": r["created_at"],
             "updated_at": r["updated_at"],
             "purge_after": r["purge_after"] or "",