feat(benchmark): smart-routing mode is the point — live results, per-model cost

The benchmark now leads with the product's actual feature. Two explicit modes:

  🧭 Smart routing (default) — every probe goes through cortiq-auto; each row
     shows the router's task label judged against the expected one (✓/✗ with
     "expected: …"), the complexity tier, the chosen model with what that
     request cost, and a task-rule badge when a routing rule fired. KPIs:
     answer quality, classification accuracy, TTFT, tok/s and money spent,
     plus a "requests went to" distribution with per-model cost.
  🎯 Individual models — the old head-to-head comparison, now as the clearly
     separate option (model checkboxes appear only here).

The suite covers all 8 taxonomy labels (added summarization, creative-writing
and chitchat probes; expected labels annotated per test). Results are LIVE:
the table grows a row after every test (with a small fade-in), the progress
card shows the prompt being asked, and a 🏁 verdict toast lands at the end
with the score and the total spend.

12 new strings in all 7 languages.

web/js/i18n/ru.js

@@ -579,4 +579,18 @@ export default {
   "bm.addTest": "Добавить тест",
   "bm.emptyAnswer": "пустой ответ",
   "bm.loopDetected": "зацикливание",
+
+  // benchmark: routing mode, cost, live
+  "bm.mode.routing": "Умный роутинг",
+  "bm.mode.models": "Отдельные модели",
+  "bm.mode.routingDesc": "Проверка главной фишки продукта: каждый тест идёт через cortiq-auto — видно, какую задачу распознал роутер, какую модель выбрал, совпало ли это с ожиданием и сколько это стоило.",
+  "bm.mode.modelsDesc": "Тот же набор тестов, но закреплённый за выбранными моделями — сравнение их качества, скорости и стоимости напрямую, мимо роутера.",
+  "bm.answersOk": "ответы верны",
+  "bm.classAcc": "классификация задач",
+  "bm.modelDist": "Запросы ушли в",
+  "bm.expectedLbl": "ожидалось:",
+  "bm.answer": "Ответ",
+  "bm.liveRunning": "идёт…",
+  "bm.spent": "потрачено",
+  "bm.verdict": "🏁 Готово: ответы {p}, потрачено {s}",
 };