feat(playground): top-p and a thoughts switch (auto/off/on)

Playground gains top-p and a reasoning selector matching the Local-models row:
auto follows the model/row default; off/on override per request via
enable_thinking (cortiq >= 0.2.1 for local models). /admin/api/test(+stream)
accept top_p and enable_thinking, proxied through GenParams passthrough.

web/js/i18n/en.js

@@ -223,6 +223,12 @@ export default {
   "pg.model": "Model",
   "pg.temp": "Temperature",
   "pg.maxTokens": "Max tokens",
+  "pg.think": "Thoughts",
+  "pg.think.auto": "auto (model default)",
+  "pg.think.off": "off — answer directly",
+  "pg.think.on": "on — force reasoning",
+  "pg.thinkHelp": "Reasoning phase of thinking models. Auto = model/row default; off/on override for this request (needs cortiq >= 0.2.1 for local models).",
+  "pg.topPHelp": "Nucleus sampling: only tokens within this cumulative probability are sampled. Empty = default.",
   "pg.send": "Send",
   "pg.stream": "Stream",
   "pg.sending": "Sending…",

web/js/i18n/ru.js

@@ -222,6 +222,12 @@ export default {
   "pg.model": "Модель",
   "pg.temp": "Температура",
   "pg.maxTokens": "Макс. токены",
+  "pg.think": "Мысли",
+  "pg.think.auto": "авто (по настройке модели)",
+  "pg.think.off": "выкл — отвечать сразу",
+  "pg.think.on": "вкл — принудительно размышлять",
+  "pg.thinkHelp": "Фаза размышлений reasoning-моделей. Авто = настройка модели; выкл/вкл переопределяют для этого запроса (для локальных нужен cortiq ≥ 0.2.1).",
+  "pg.topPHelp": "Nucleus-сэмплинг: выбираются токены в пределах этой суммарной вероятности. Пусто = по умолчанию.",
   "pg.send": "Отправить",
   "pg.stream": "Стриминг",
   "pg.sending": "Отправка…",

web/js/views/playground.js

@@ -16,6 +16,12 @@ export async function renderPlayground() {
   const promptIn = h("textarea", { placeholder: t("pg.promptPlaceholder"), rows: 5 });
   const tempIn = h("input", { type: "number", step: "0.1", value: 0.7 });
   const maxTokIn = h("input", { type: "number", value: 512 });
+  const topPIn = h("input", { type: "number", step: "0.05", min: 0, max: 1, placeholder: "0.9", title: t("pg.topPHelp") });
+  // reasoning switch: auto = model/row default; off/on override per request
+  const thinkSel = h("select", { title: t("pg.thinkHelp") },
+    h("option", { value: "" }, t("pg.think.auto")),
+    h("option", { value: "off" }, t("pg.think.off")),
+    h("option", { value: "on" }, t("pg.think.on")));
   const streamCb = h("input", { type: "checkbox", checked: true });
   const profileSel = h("select", {}, ...(meta.profiles || []).map((p) => h("option", { value: p }, p)));
   const modelSel = h("select", {}, ...ids.map((id) => h("option", { value: id }, id)));
@@ -69,6 +75,8 @@ export async function renderPlayground() {
       temperature: parseFloat(tempIn.value),
       max_tokens: parseInt(maxTokIn.value) || null,
     };
+    if (topPIn.value !== "") body.top_p = parseFloat(topPIn.value);
+    if (thinkSel.value) body.enable_thinking = thinkSel.value === "on";
     try {
       if (streamCb.checked) {
         const started = performance.now();
@@ -151,6 +159,9 @@ export async function renderPlayground() {
           h("label", { class: "field" }, h("span", {}, t("pg.mode")), modeSeg),
           modeExtra,
           h("div", { class: "row" }, h("label", { class: "field" }, h("span", {}, t("pg.temp")), tempIn), h("label", { class: "field" }, h("span", {}, t("pg.maxTokens")), maxTokIn)),
+          h("div", { class: "row" },
+            h("label", { class: "field" }, h("span", {}, "top-p"), topPIn),
+            h("label", { class: "field" }, h("span", {}, t("pg.think")), thinkSel)),
           h(
             "div",
             { class: "flex", style: "justify-content:space-between" },