feat(codex): add Tencent Hunyuan TokenHub preset with native Responses

Official TokenHub Codex docs (cloud.tencent.com/document/product/1823/133532)
confirm hy3 speaks the Responses API natively; the mandatory
disable_response_storage=true is already emitted by the config
generator. Models hy3/hy3-preview are text-only with a 256k context
window. Endpoint candidates include the official backup domain, while
the intl site is excluded because API keys are region-scoped.

src/config/codexProviderPresets.ts

@@ -1099,6 +1099,50 @@ requires_openai_auth = true`,
     icon: "bailian",
     iconColor: "#624AFF",
   },
+  {
+    name: "Tencent Hunyuan",
+    websiteUrl: "https://cloud.tencent.com/product/tokenhub",
+    apiKeyUrl: "https://console.cloud.tencent.com/tokenhub/apikey",
+    auth: generateThirdPartyAuth(""),
+    config: generateThirdPartyConfig(
+      "hy3_tokenhub",
+      "https://tokenhub.tencentmaas.com/v1",
+      "hy3",
+    ),
+    // 官方备用域名 tencentmaas.cn（文档 1823/130078）；国际站 tokenhub-intl
+    // 属不同地域，API Key 不跨站通用，不作候选
+    endpointCandidates: [
+      "https://tokenhub.tencentmaas.com/v1",
+      "https://tokenhub.tencentmaas.cn/v1",
+    ],
+    // 腾讯 TokenHub 官方 Codex 文档（cloud.tencent.com/document/product/1823/133532）：
+    // hy3 原生 Responses（wire_api=responses；官方硬性要求的
+    // disable_response_storage=true 已由 generateThirdPartyConfig 输出）。
+    // ⚠️ 须用 TokenHub API Key（创建时范围需勾选 Hy3）；Coding Plan / Token Plan
+    // 订阅 Key 只能走各自 chat 端点，对本预设的 /v1 不通。
+    // hy3 在带 tools 的请求里会把 reasoning_effort=low 服务端自动升为 high
+    // （Codex 恒带 tools），默认 high 即真实行为。
+    apiFormat: "openai_responses",
+    // 无官方 catalog：合成 MiMo 式（shell_command 编辑、不发 freeform apply_patch）
+    modelCatalog: modelCatalog([
+      {
+        model: "hy3",
+        displayName: "Hy3",
+        contextWindow: 256000,
+        // hy3 不在官方多模态理解模型名单（1823/130988），纯文本
+        inputModalities: ["text"],
+      },
+      {
+        model: "hy3-preview",
+        displayName: "Hy3 Preview",
+        contextWindow: 256000,
+        inputModalities: ["text"],
+      },
+    ]),
+    category: "cn_official",
+    icon: "hunyuan",
+    iconColor: "#0055E9",
+  },
   {
     name: "StepFun",
     websiteUrl: "https://platform.stepfun.com/step-plan",

tests/config/codexChatProviderPresets.test.ts

@@ -158,6 +158,11 @@ describe("Codex Chat provider presets", () => {
         { contextWindows: { "doubao-seed-2-1-pro-260628": 262144 } },
       ],
       ["Bailian", { contextWindows: { "qwen3-coder-plus": 1048576 } }],
+      // 腾讯 TokenHub 官方 Codex 文档确认 hy3 原生 Responses（2026-07-14）
+      [
+        "Tencent Hunyuan",
+        { contextWindows: { hy3: 256000, "hy3-preview": 256000 } },
+      ],
       // DeepSeek 官方 Codex 文档确认 deepseek-v4-flash 原生 Responses；
       // catalog 由后端按 deepseek.com host 镜像官方 models.json 生成
       [