docs: add SJTU Netdisk driver documentation

docs/guide/drivers/sjtu_netdisk.md

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+---
+# This is the icon of the page
+icon: iconfont icon-state
+# This control sidebar order
+order: 217
+# A page can have multiple categories
+category:
+  - Guide
+# A page can have multiple tags
+tag:
+  - Storage
+  - Guide
+  - "302"
+# this page is sticky in article list
+sticky: true
+# this page will appear in starred articles
+star: true
+---
+# SJTUNetdisk
+
+**https://pan.sjtu.edu.cn**
+
+:::tip
+
+- SJTU Netdisk uses `302` redirect as the default download method.
+- Login credentials may expire; use `Keep alive` to maintain the session.
+
+:::
+
+<br/>
+
+## **User token**
+
+Open the developer debugging tool (F12) in your browser, switch to the **Network** tab and check **Disable cache**. After logging in to SJTU Netdisk, find the request that carries the authentication information, copy the `user_token` value and fill it in.
+
+![user_token](/img/drivers/sjtu_netdisk/user_token.jpg)
+
+<br/>
+
+## **Keep alive**
+
+When enabled, AList will periodically refresh the user token to keep the session alive, preventing the token from expiring after long periods of inactivity. Find the response header of the request that carries `Set-Cookie`, copy the `keepalive` value and fill it in.
+
+![keep_alive](/img/drivers/sjtu_netdisk/keep_alive.jpg)
+
+<br/>
+
+## **User id**
+
+Find the request that carries the `user ID` &mdash; it is located in the response body. Copy the `id` value and fill it in.
+
+![user_id](/img/drivers/sjtu_netdisk/user_id.jpg)
+
+<br/>
+
+## **Order by**
+
+Choose the field by which files and folders are sorted:
+
+- `Name` &mdash; Sort by file/folder name
+- `ModificationTime` &mdash; Sort by last modified time
+- `Size` &mdash; Sort by file size
+
+<br/>
+
+## **Order by type**
+
+Choose the sort direction:
+
+- `Asc` &mdash; Ascending order
+- `Desc` &mdash; Descending order
+
+<br/>
+
+### **The default download method used**
+
+```mermaid
+---
+title: Which download method is used by default?
+---
+flowchart TB
+    style a1 fill:#bbf,stroke:#f66,stroke-width:2px,color:#fff
+    style a2 fill:#ff7575,stroke:#333,stroke-width:4px
+    subgraph ide1 [ ]
+    a1
+    end
+    a1[302]:::someclass====|default|a2[user equipment]
+    classDef someclass fill:#f96
+    c1[local proxy]-.alternative.->a2[user equipment]
+    b1[Download proxy URL]-.alternative.->a2[user equipment]
+    click a1 "../drivers/common.html#webdav-policy"
+    click b1 "../drivers/common.html#webdav-policy"
+    click c1 "../drivers/common.html#webdav-policy"
+```

docs/zh/guide/drivers/sjtu_netdisk.md

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+---
+# This is the icon of the page
+icon: iconfont icon-state
+# This control sidebar order
+order: 217
+# A page can have multiple categories
+category:
+  - Guide
+# A page can have multiple tags
+tag:
+  - Storage
+  - Guide
+  - "302"
+# this page is sticky in article list
+sticky: true
+# this page will appear in starred articles
+star: true
+---
+# 交大云盘
+
+**https://pan.sjtu.edu.cn**
+
+:::tip
+
+- 交大云盘默认使用 `302` 重定向方式下载。
+- 登录凭证可能会过期，建议开启 `Keep alive` 保持会话有效。
+
+:::
+
+<br/>
+
+## **User token（用户令牌）**
+
+在浏览器中打开开发者调试工具（F12），切换到 **Network（网络）** 标签页并勾选 **Disable cache（禁用缓存）**。登录交大云盘后，找到携带认证信息的请求，复制 `user_token` 的值并填入。
+
+![user_token](/img/drivers/sjtu_netdisk/user_token.jpg)
+
+<br/>
+
+## **Keep alive（保持活动状态）**
+
+开启后，AList 会定期刷新用户令牌以保持会话有效，避免令牌在长时间不活跃后过期。找到携带 `Set-Cookie` 的请求的响应头，复制 `keepalive` 的值并填入。
+
+![keep_alive](/img/drivers/sjtu_netdisk/keep_alive.jpg)
+
+<br/>
+
+## **User id（用户ID）**
+
+找到携带 `user ID` 的请求 &mdash; 它位于响应体中。复制 `id` 的值并填入。
+
+![user_id](/img/drivers/sjtu_netdisk/user_id.jpg)
+
+<br/>
+
+## **Order by（排序）**
+
+选择文件和文件夹的排序依据：
+
+- `名称` &mdash; 按文件/文件夹名称排序
+- `修改时间` &mdash; 按最后修改时间排序
+- `大小` &mdash; 按文件大小排序
+
+<br/>
+
+## **Order by type（按类型排序）**
+
+选择排序方向：
+
+- `升序` &mdash; 升序
+- `降序` &mdash; 降序
+
+<br/>
+
+### **默认使用的下载方式**
+
+```mermaid
+---
+title: 默认使用哪种下载方式？
+---
+flowchart TB
+    style a1 fill:#bbf,stroke:#f66,stroke-width:2px,color:#fff
+    style a2 fill:#ff7575,stroke:#333,stroke-width:4px
+    subgraph ide1 [ ]
+    a1
+    end
+    a1[302]:::someclass====|默认|a2[用户设备]
+    classDef someclass fill:#f96
+    c1[本地代理]-.备选.->a2[用户设备]
+    b1[下载代理 URL]-.备选.->a2[用户设备]
+    click a1 "../drivers/common.html#webdav-policy"
+    click b1 "../drivers/common.html#webdav-policy"
+    click c1 "../drivers/common.html#webdav-policy"
+```