feat(5.16+5.17): tipografie/antet branded + tipuri cont, planuri si enforcement

PRD 5.16 — propagare design finalizata (system font stack, fara IBM Plex self-hostat):
- US-001/002/008: tokeni --font-ui/--font-mono (system stack) + scala --fs-*; zero
  @font-face si zero /static/fonts/; landing aliniat la acelasi stack
- US-003: RAR online = dot compact in antet + meniu burger; banda rosie DOAR pe blocat
  (invariant zero-silent-failures pastrat)
- US-010: antet "ROMFAST AUTOPASS" + nume service + /login brandeit 2 coloane + badge plan;
  meniu burger cu separatoare; gate strict pe is_authenticated
- US-011: selector tema pill icon+eticheta (reuse THEMES)
- US-004/005/006/007: bug-fix editor prestatii (picker cod+denumire, add_extra in mod
  operatii, cod ales se salveaza fara "+", Renunta inchide via closest)
- US-012/013: landing Autentificare->/login; wizard import colapsat + 4 pasi pe tokeni
- fix VERIFY E2E: contoare duplicate pe 390px (inline display:flex batea @media) -> CSS + test-lock

PRD 5.17 — tipuri de cont + trial Pro 30z + enforcement DUR:
- US-001/002/008: accounts.tier + trial_until (migrare aditiva defensiva); app/plans.py
  sursa unica (PLANS, FREE_MONTHLY_LIMIT=60, effective_tier(now injectabil), monthly_usage,
  CONSUMED_STATUSES); create_account trial Pro 30z; CLI set-tier (protejat id=1, audit)
- US-003/004/005: enforce volum 60/luna INAINTE de build_key pe ambele canale
  (PLAN_LIMITA_LUNARA, 3 niveluri + log_event); gate API Pro+ (PLAN_FARA_API 403 actionabil);
  valideaza/nomenclator raman permise; downgrade lazy; flag AUTOPASS_ENFORCE_PLANS (kill-switch)
- US-006: badge plan antet + linie burger + consum N/60 + warn>=80% + 6 stari + copy RO
  pluralizat + banner one-time trial->Gratuit + pagina Cont

Regresie: 1380 passed, 0 failed, 1 deselected (live). E2E browser pe 390/1280 confirmat.
Backend trimitere (worker/masina stari/idempotenta/contract RAR) NEATINS. Lucrul 5.18
(corpus kNN) ramane separat, necomis.

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

app/api/v1/router.py

@@ -13,11 +13,13 @@ import csv
 import io
 import json
 
+from datetime import datetime, timezone
+
 from fastapi import APIRouter, Depends, HTTPException
 from fastapi.responses import StreamingResponse
 from pydantic import BaseModel, Field
 
-from ...auth import resolve_account_id
+from ...auth import require_api_access, resolve_account_id
 from ...crypto import encrypt_creds
 from ...db import get_connection
 from ...errors import eroare as err_eroare
@@ -135,7 +137,7 @@ def _rezultat_respins(submission_id: int | None, cl: dict) -> SubmissionResult:
 @router.post("/prezentari", response_model=PrezentariResponse)
 def create_prezentari(
     req: PrezentareRequest,
-    account_id: int = Depends(resolve_account_id),
+    account_id: int = Depends(require_api_access),
 ) -> PrezentariResponse:
     """Enqueue una/mai multe prezentari. Idempotent: continut identic -> acelasi submission.
 
@@ -165,6 +167,46 @@ def create_prezentari(
         # Reguli text incarcate o data per cerere (seam partajat cu dry-run).
         text_rules = load_text_rules(conn, acct)
         error_mode = _effective_on_unmapped_error(conn, acct, req.on_unmapped_error)
+
+        # T3 (PRD 5.17): enforce volum plan — INAINTE de build_key/enqueue (invariant idempotenta).
+        # Decizie #21: respingere TOTALA a lotului (nu enqueue partial tacut).
+        from ...config import get_settings as _get_settings
+        from ...plans import PLANS, effective_tier, monthly_usage
+        _settings = _get_settings()
+        if _settings.enforce_plans:
+            _acct_row = conn.execute(
+                "SELECT tier, trial_until FROM accounts WHERE id=?", (acct,)
+            ).fetchone()
+            _now = datetime.now(timezone.utc)
+            _et = effective_tier(_acct_row, _now)
+            _plan_limit = PLANS[_et].get("monthly_limit")
+            if _plan_limit is not None:
+                _usage = monthly_usage(conn, acct, _now)
+                _nr_cerut = len(req.prezentari)
+                if _usage + _nr_cerut > _plan_limit:
+                    _remaining = max(0, _plan_limit - _usage)
+                    log_event(
+                        "plan_limita_lunara_atinsa",
+                        account_id=acct,
+                        nivel="WARNING",
+                        mesaj=f"Lot de {_nr_cerut} respins (usage={_usage}, limita={_plan_limit})",
+                        context={
+                            "nr_cerut": _nr_cerut, "usage": _usage,
+                            "plan_limit": _plan_limit, "tier": _et,
+                        },
+                        conn=conn,
+                    )
+                    raise HTTPException(
+                        status_code=422,
+                        detail=err_eroare(
+                            "PLAN_LIMITA_LUNARA",
+                            cauza=(
+                                f"Ai trimis {_usage}/{_plan_limit} prezentari luna aceasta;"
+                                f" mai poti trimite {_remaining}."
+                            ),
+                        ),
+                    )
+
         for prez in req.prezentari:
             content = prez.model_dump()
             # canonicalize_row inaintea build_key (odometru strip ".0", VIN upper).