fix(web): correct China-network install snippet (#1104 follow-up) (#1121)

DeepSeek's official API has a single endpoint, https://api.deepseek.com,
with servers physically in China. There is no separate mainland endpoint,
and api.deepseeki.com is a typo grandfathered into the source.

The /zh/install "国内 API 访问" panel previously suggested users set a
custom base_url to a China endpoint, which doesn't exist. Replace with
the truth: the default works for mainland users; only override
DEEPSEEK_BASE_URL if you have a private mirror.

Also re-runs derive-facts to keep facts.generated.ts at 9 providers.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

web/app/[locale]/install/page.tsx

@@ -95,21 +95,22 @@ registry = "sparse+https://mirrors.tuna.tsinghua.edu.cn/crates.io-index/"`}
               <div className="p-6 min-w-0">
                 <h3 className="font-display text-lg mb-2">国内 API 访问</h3>
                 <p className="text-sm text-ink-soft leading-[1.9] tracking-wide mb-3">
-                  默认 <code className="inline">https://api.deepseek.com</code> 在国内通常可直连。
-                  网络不通时，通过自定义 <code className="inline">base_url</code> 或环境变量
-                  <code className="inline">DEEPSEEK_BASE_URL</code> 切换至替代节点：
+                  DeepSeek 服务器位于中国境内，
+                  <code className="inline">https://api.deepseek.com</code>{" "}
+                  是
+                  <a href="https://api-docs.deepseek.com/" className="body-link">官方唯一域名</a>，
+                  国内可直连——无需替代节点。设置 API key：
                 </p>
                 <pre className="code-block text-[0.78rem]">
-{`# ~/.deepseek/config.toml
-[api]
-base_url = "https://<你的节点>"
+{`# 推荐：环境变量
+export DEEPSEEK_API_KEY=sk-...
 
-# 或环境变量（推荐，便于临时切换）：
-#   export DEEPSEEK_BASE_URL=https://<你的节点>`}
+# 或保存到配置文件
+deepseek auth set --provider deepseek --api-key sk-...`}
                 </pre>
                 <p className="text-sm text-ink-soft leading-[1.9] tracking-wide mt-3">
-                  API key 通过 <code className="inline">deepseek auth set --provider deepseek</code>{" "}
-                  保存，或设 <code className="inline">DEEPSEEK_API_KEY</code> 环境变量。
+                  如有自建反向代理或私有镜像，可通过{" "}
+                  <code className="inline">DEEPSEEK_BASE_URL</code> 覆盖默认地址。
                 </p>
               </div>
             </div>

web/lib/facts.generated.ts

@@ -18,7 +18,7 @@ export interface RepoFacts {
 }
 
 export const FACTS: RepoFacts = {
-  "generatedAt": "2026-05-08T01:33:23.678Z",
+  "generatedAt": "2026-05-08T02:25:40.439Z",
   "version": "0.8.18",
   "crates": [
     "agent",