docs: update Slack setup steps and screenshot (#10353)

* docs: update Slack setup steps and screenshot

* docs: sync English Slack setup guide

Author: wcqqq1214

docs/en/platform/slack.md

@@ -4,16 +4,14 @@
 
 Navigate to the `Platforms` page, click `Add Adapter`, find Slack and click to enter the Slack configuration page.
 
-![image](https://files.astrbot.app/docs/source/images/slack/image-1.png)
-
-In the configuration dialog that appears, click `Enable`.
+![Select the Slack messaging platform](/slack/image-1.png?v=2)
 
 ## Create an App in Slack
 
 Slack supports two connection methods: `Webhook` and `Socket`. If you don't have a public server and your message volume is relatively small, we recommend using the `socket` method. If you have a public server (or have technical knowledge about setting up tunnels, such as Cloudflare Tunnel), you can choose the `webhook` method. The `socket` method is relatively simpler to deploy.
 
 1. Create a [Slack](https://slack.com/signin) account and a Workspace.
-2. Go to [Apps Management](https://api.slack.com/apps), click "Create New App" -> "From Scratch", enter the `App Name` and the workspace to add it to, then click "Create App".
+2. Go to [Apps Management](https://api.slack.com/apps), click "Create New App" -> "Blank app" -> "Continue". Enter the `App Name`, select the workspace to add it to, then click "Create".
 3. (Webhook only) Obtain the `Signing Secret`. In the Basic Information page on the left sidebar, find `Signing Secret` under App Credentials, click Show and copy it to the signing_secret field in the platform adapter configuration.
 
 ![image](https://files.astrbot.app/docs/source/images/slack/image.png)
@@ -37,10 +35,13 @@ Slack supports two connection methods: `Webhook` and `Socket`. If you don't have
    - im:history
    - im:read
    - im:write
+   - mpim:read
    - reactions:read
    - reactions:write
    - users:read
 
+   When subscribing to the `member_joined_channel` event, Slack automatically requires `mpim:read` to view basic information about group direct messages the bot has joined.
+
 6. In the OAuth & Permissions page on the left sidebar, click `Install to xxx` under OAuth Token (where xxx is your workspace name). Then copy the generated Bot User OAuth Token to the bot_token field in the platform adapter configuration.
 
 7. (Socket only) In the Socket Mode page on the left sidebar, enable Socket Mode.
@@ -85,6 +86,8 @@ After enabling, under Subscribe to bot events below, click Add Bot User Event an
 10. reaction_removed
 11. team_join
 
+After adding the events, click `Save Changes` at the bottom of the page to save the subscriptions before testing below.
+
 ## Test the Connection
 
 Enter the Slack workspace you just added, navigate to the channel where you want to use the bot, then @ mention the app you just created. Click the Add button in the message subsequently sent by Slackbot to add it to the workspace. Then, @ mention the app and type `/help`. If it responds successfully, the test is successful.

docs/public/slack/image-1.png

@@ -4,16 +4,15 @@
 
 进入 `机器人` 页，点击 `+ 创建机器人`，找到 Slack 并点击进入 Slack 配置页。
 
-![image](https://files.astrbot.app/docs/source/images/slack/image-1.png)
-
-在弹出的配置对话框中点击 `启用`。
+![选择 Slack 消息平台](/slack/image-1.png?v=2)
 
 ## 在 Slack 创建 App
 
 Slack 支持两种接入方式：`Webhook` 与 `Socket`。如果您没有公网服务器并且消息业务量的规模较小，我们建议您使用 `socket` 方式。如果您有公网服务器（或者有一定的技术背景，了解如何设置 Tunnel，如 Cloudflare Tunnel），可以选择 `webhook` 方式。`socket` 方式部署相对简单。
 
 1. 创建 [Slack](https://slack.com/signin) 账号和一个工作区（Workspace）。
-2. 前往 [应用后台](https://api.slack.com/apps)，点击「Create New App」->「From Scratch」，输入 `应用名称` 和要添加到的工作区，然后点击「Create App」。  
+2. 前往 [应用后台](https://api.slack.com/apps)，点击「Create New App」->「Blank app」->「Continue」。输入 `应用名称` 和要添加到的工作区，然后点击「Create」。
+
 3. （仅 Webhook 需要）获取 `Signing Secret`，在左边栏 Basic Information 页下，找到 App Credentials 的 `Signing Secret`，点击 Show 并且复制到平台适配器配置的 signing_secret 处。
 
 ![image](https://files.astrbot.app/docs/source/images/slack/image.png)
@@ -37,10 +36,13 @@ Slack 支持两种接入方式：`Webhook` 与 `Socket`。如果您没有公网
    - im:history
    - im:read
    - im:write
+   - mpim:read
    - reactions:read
    - reactions:write
    - users:read
 
+   订阅 `member_joined_channel` 事件时，Slack 会自动要求 `mpim:read`，用于读取机器人已加入的群组私聊的基本信息。
+
 6. 在左边栏 OAuth & Permissions 页下，在 Oauth Token 处点击 `Install to xxx`（xxx 是您工作区的名字）。然后复制生成的 Bot User OAuth Token 到平台适配器配置的 bot_token 处。
 
 7. （仅 Socket 需要）在左边栏 Socket Mode 页下，开启 Enable Socket Mode。
@@ -84,6 +86,8 @@ Slack 支持两种接入方式：`Webhook` 与 `Socket`。如果您没有公网
 10. reaction_removed
 11. team_join
 
+添加完成后，点击页面底部的 `Save Changes` 保存事件订阅，再进行下面的测试。
+
 ## 测试成功性
 
 进入您刚刚添加的 Slack 工作区，进入需要用到 Bot 的频道，然后 @ 您刚刚创建的应用。然后点击 Slackbot 随后发送的消息中的 添加 按钮来添加到工作区中。然后，@ 应用，输入 `/help`，如果能够成功回复，说明测试成功。