docs(SSR): add SSR compatibility documentation and integrate warnings into component READMEs and FAQ.

packages/vant/docs/markdown/faq.en-US.md

@@ -81,3 +81,7 @@ See [Adapt to PC Browsers](#/en-US/advanced-usage#adapt-to-pc-browsers).
 ### How do I implement mobile responsive adaptation?
 
 See [Browser Adaptation](#/en-US/advanced-usage#browser-adaptation).
+
+### Why are some components not compatible with Server-Side Rendering (SSR)?
+
+See [SSR Compatibility Issues](#/en-US/ssr-issue#intro).

packages/vant/docs/markdown/faq.zh-CN.md

@@ -81,3 +81,7 @@ Vant 所有组件都是基于 Vue 框架实现的，没有针对 uni-app 进行
 ### 如何进行移动端响应式适配？
 
 参见[浏览器适配](#/zh-CN/advanced-usage#liu-lan-qi-gua-pei)。
+
+### 部分组件无法兼容服务端渲染（SSR）场景？
+
+参见[SSR兼容问题](#/zh-CN/ssr-issue#jie-shao)。

packages/vant/docs/markdown/ssr-issue.en-US.md

@@ -0,0 +1,11 @@
+# Server-Side Rendering (SSR) Compatibility
+
+### Intro
+
+Some components rely on DOM operations or browser APIs, which leads to compatibility issues in SSR scenarios, causing components to function incorrectly.
+
+### Components
+
+#### Tab
+
+The Tab component does not render in SSR scenarios. See [Tab title cannot be SSR](https://github.com/youzan/vant/issues/5278).

packages/vant/docs/markdown/ssr-issue.zh-CN.md

@@ -0,0 +1,11 @@
+# 服务端渲染（SSR）兼容性问题
+
+### 介绍
+
+某些组件实现依赖于 DOM 操作或浏览器的API，SSR 场景下会存在兼容性问题，导致组件无法正常工作。
+
+### 组件
+
+#### Tab
+
+Tab组件在SSR场景下不会渲染，见[tab 组件的title无法ssr](https://github.com/youzan/vant/issues/5278)。

packages/vant/src/tab/README.md

@@ -4,6 +4,8 @@
 
 Used to switch between different content areas.
 
+> ⚠️ **Attention**: The Tab component has compatibility issues in SSR (Server-Side Rendering) scenarios. For details, see [SSR Compatibility Issues](#/en-US/ssr-issue#tab).
+
 ### Install
 
 Register component globally via `app.use`, refer to [Component Registration](#/en-US/advanced-usage#zu-jian-zhu-ce) for more registration ways.

packages/vant/src/tab/README.zh-CN.md

@@ -4,6 +4,8 @@
 
 选项卡组件，用于在不同的内容区域之间进行切换。
 
+> ⚠️ **注意**：Tab组件在SSR（服务端渲染）场景存在兼容性问题，详见[SSR兼容性问题](#/zh-CN/ssr-issue#tab)。
+
 ### 引入
 
 通过以下方式来全局注册组件，更多注册方式请参考[组件注册](#/zh-CN/advanced-usage#zu-jian-zhu-ce)。

packages/vant/vant.config.mjs

@@ -108,6 +108,10 @@ location.href = location.href.replace('youzan.github.io', 'vant-ui.github.io');
                 path: 'locale',
                 title: '国际化',
               },
+              {
+                path: 'ssr-issue',
+                title: 'SSR兼容问题',
+              },
             ],
           },
           {
@@ -580,6 +584,10 @@ location.href = location.href.replace('youzan.github.io', 'vant-ui.github.io');
                 path: 'locale',
                 title: 'Internationalization',
               },
+              {
+                path: 'ssr-issue',
+                title: 'SSR Issues',
+              },
             ],
           },
           {