chore: new help articles

_panel-docs/help-articles/en/AUTH_METHODS_GITHUB.md

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+## OAuth2: GitHub
+
+### Creating an OAuth Application
+
+First, you need to create an OAuth application.
+Follow the link to create an application: [https://github.com/settings/applications/new](https://github.com/settings/applications/new)
+
+```bash title="Authorization callback URL"
+# Replace YOUR_PANEL_DOMAIN with your panel address
+https://YOUR_PANEL_DOMAIN/oauth2/callback/github
+```
+
+Don't forget to replace `YOUR_PANEL_DOMAIN` with the correct panel address.
+
+### OAuth2 Settings in Remnawave
+
+After creating the OAuth2 application – copy the `Client ID` and `Client Secret`. Insert this data in the corresponding section. And below, enter the list of email addresses for which login will be allowed.

_panel-docs/help-articles/en/AUTH_METHODS_POCKETID.md

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+## OAuth2: PocketID
+
+### Creating an OIDC Client
+
+Log in to the PocketID admin panel and navigate to: `Settings` → `OIDC Clients` → `Add OIDC Client`
+
+```
+# Replace YOUR_PANEL_DOMAIN with your Remnawave panel address
+https://YOUR_PANEL_DOMAIN/oauth2/callback/pocketid
+```
+
+### OAuth2 Settings in Remnawave
+
+After creating the OAuth2 application – copy the `Client ID` and `Client Secret`. Insert this data in the corresponding section. And below, enter the list of email addresses for which login will be allowed.
+
+In the `Plain Domain` field, enter the domain address where your PocketID is located.
+Just enter the domain name – without the path and `https://`, for example: `pocketid.your-domain.com`

_panel-docs/help-articles/en/AUTH_METHODS_YANDEX.md

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+## OAuth2: Yandex
+
+The Yandex authentication method is not recommended for use.
+
+### Creating an OAuth Application
+
+You need to create an OAuth application in Yandex.
+
+Follow the link to create an application: https://oauth.yandex.com/client/new
+
+On the second step of application creation, select the "Web application" option and enter the `Callback URL`
+
+```
+# Replace YOUR_PANEL_DOMAIN with your Remnawave panel address
+https://YOUR_PANEL_DOMAIN/oauth2/callback/yandex
+```
+
+Don't forget to replace `YOUR_PANEL_DOMAIN` with the correct panel address.
+
+On the third step of creation – make sure to check the box next to `Access to email address`, no other permissions are required.

_panel-docs/help-articles/fa/AUTH_METHODS_GITHUB.md

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+## OAuth2: GitHub
+
+### Creating an OAuth Application
+
+First, you need to create an OAuth application.
+Follow the link to create an application: [https://github.com/settings/applications/new](https://github.com/settings/applications/new)
+
+```bash title="Authorization callback URL"
+# Replace YOUR_PANEL_DOMAIN with your panel address
+https://YOUR_PANEL_DOMAIN/oauth2/callback/github
+```
+
+Don't forget to replace `YOUR_PANEL_DOMAIN` with the correct panel address.
+
+### OAuth2 Settings in Remnawave
+
+After creating the OAuth2 application – copy the `Client ID` and `Client Secret`. Insert this data in the corresponding section. And below, enter the list of email addresses for which login will be allowed.

_panel-docs/help-articles/fa/AUTH_METHODS_POCKETID.md

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+## OAuth2: PocketID
+
+### Creating an OIDC Client
+
+Log in to the PocketID admin panel and navigate to: `Settings` → `OIDC Clients` → `Add OIDC Client`
+
+```
+# Replace YOUR_PANEL_DOMAIN with your Remnawave panel address
+https://YOUR_PANEL_DOMAIN/oauth2/callback/pocketid
+```
+
+### OAuth2 Settings in Remnawave
+
+After creating the OAuth2 application – copy the `Client ID` and `Client Secret`. Insert this data in the corresponding section. And below, enter the list of email addresses for which login will be allowed.
+
+In the `Plain Domain` field, enter the domain address where your PocketID is located.
+Just enter the domain name – without the path and `https://`, for example: `pocketid.your-domain.com`

_panel-docs/help-articles/fa/AUTH_METHODS_TELEGRAM.md

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+## Telegram OAuth2
+
+To configure the "Login via Telegram" feature, you need a Telegram bot. Additionally, you need to configure the bot for the feature to work correctly.
+
+### Bot Configuration
+
+1. Open @BotFather (https://t.me/botfather)
+
+2. Send the `/mybots` command and select the required bot
+
+3. Select the option `Bot settings` → `Domain`
+
+4. Select the option `Set domain`
+
+    Now send the bot a message containing the domain name used to access Remnawave.
+
+    ```
+    https://panel.domain.com
+    ```
+
+### Access Configuration
+
+After entering the bot token, you need to specify a list of administrator IDs who will have access to login.
+
+1. From the required account, launch the bot – https://t.me/Get_myidrobot
+2. In response, the bot will send you your ID, enter it in the corresponding field.
+
+---
+
+### Known Error Solutions
+
+###### Error: BOT_DOMAIN_INVALID
+
+This error occurs due to incorrect bot domain configuration – review the "Bot Configuration" section (above). If necessary, repeat this step-by-step process.
+
+###### Error: Telegram confirmation code not received during login
+
+Unfortunately, this issue cannot be resolved from the Remnawave side. Try using a bot that was created a while ago or use a different browser.
+Alternatively, you can try logging in on one of the "official" resources – for example, https://fragment.com. Since the Telegram session within the browser will be shared – you can try logging into the panel.

_panel-docs/help-articles/fa/AUTH_METHODS_YANDEX.md

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+## OAuth2: Yandex
+
+The Yandex authentication method is not recommended for use.
+
+### Creating an OAuth Application
+
+You need to create an OAuth application in Yandex.
+
+Follow the link to create an application: https://oauth.yandex.com/client/new
+
+On the second step of application creation, select the "Web application" option and enter the `Callback URL`
+
+```
+# Replace YOUR_PANEL_DOMAIN with your Remnawave panel address
+https://YOUR_PANEL_DOMAIN/oauth2/callback/yandex
+```
+
+Don't forget to replace `YOUR_PANEL_DOMAIN` with the correct panel address.
+
+On the third step of creation – make sure to check the box next to `Access to email address`, no other permissions are required.

_panel-docs/help-articles/ru/AUTH_METHODS_GITHUB.md

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+## OAuth2: Github
+
+### Создание OAuth приложения
+
+Для начала вам необходимо создать OAuth приложение.
+Перейдите по ссылке для создания приложения: [https://github.com/settings/applications/new](https://github.com/settings/applications/new)
+
+```bash title="Authorization callback URL"
+# Замените YOUR_PANEL_DOMAIN на адрес вашей панели
+https://YOUR_PANEL_DOMAIN/oauth2/callback/github
+```
+
+Не забудьте заменить `YOUR_PANEL_DOMAIN` на корректный адрес панели.
+
+### Настройки OAuth2 в Remnawave
+
+После создания OAuth2 приложения – скопируйте `Client ID` и `Client Secret`. Вставьте эти данные в соответствующем разделе. А чуть ниже введите список email-адресов для которых будет разрешен вход.

_panel-docs/help-articles/ru/AUTH_METHODS_POCKETID.md

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+## OAuth2: PocketID
+
+### Создание OIDC Client
+
+Зайдите в админ-панели PocketID и перейдите: `Settings` → `OIDC Clients` → `Add OIDC Client`
+
+```
+# Замените YOUR_PANEL_DOMAIN на ваш адрес панели Remnawave
+https://YOUR_PANEL_DOMAIN/oauth2/callback/pocketid
+```
+
+### Настройки OAuth2 в Remnawave
+
+После создания OAuth2 приложения – скопируйте `Client ID` и `Client Secret`. Вставьте эти данные в соответствующем разделе. А чуть ниже введите список email-адресов для которых будет разрешен вход.
+
+В поле `Домен` (`Plain Domain`) введите доменный адрес, на котором у вас расположен PocketID. Достаточно ввести просто доменное имя – без пути и https://, например: `pocketid.your-domain.com`

_panel-docs/help-articles/ru/AUTH_METHODS_YANDEX.md

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+## OAuth2: Yandex
+
+Метод аутентификации через Яндекс не рекомендуется к использованию.
+
+### Создание OAuth приложения
+
+Вам необходимо создать Oauth-приложение в Яндексе.
+
+Перейдите по ссылке для создания приложения: https://oauth.yandex.com/client/new
+
+На втором шаге создания приложения выберите опцию "Веб-приложени" и впишите `Callback URL`
+
+```
+# Замените YOUR_PANEL_DOMAIN на ваш адрес панели Remnawave
+https://YOUR_PANEL_DOMAIN/oauth2/callback/yandex
+```
+
+Не забудьте заменить `YOUR_PANEL_DOMAIN` на корректный адрес панели.
+
+На третьем шаге создания – обязательно поставьте галочку возле пункта `Access to email address` (`Доступ к email адресу`), никаких других разрешений не требуется.

_panel-docs/help-articles/zh/AUTH_METHODS_GITHUB.md

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+## OAuth2: GitHub
+
+### Creating an OAuth Application
+
+First, you need to create an OAuth application.
+Follow the link to create an application: [https://github.com/settings/applications/new](https://github.com/settings/applications/new)
+
+```bash title="Authorization callback URL"
+# Replace YOUR_PANEL_DOMAIN with your panel address
+https://YOUR_PANEL_DOMAIN/oauth2/callback/github
+```
+
+Don't forget to replace `YOUR_PANEL_DOMAIN` with the correct panel address.
+
+### OAuth2 Settings in Remnawave
+
+After creating the OAuth2 application – copy the `Client ID` and `Client Secret`. Insert this data in the corresponding section. And below, enter the list of email addresses for which login will be allowed.

_panel-docs/help-articles/zh/AUTH_METHODS_POCKETID.md

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+## OAuth2: PocketID
+
+### Creating an OIDC Client
+
+Log in to the PocketID admin panel and navigate to: `Settings` → `OIDC Clients` → `Add OIDC Client`
+
+```
+# Replace YOUR_PANEL_DOMAIN with your Remnawave panel address
+https://YOUR_PANEL_DOMAIN/oauth2/callback/pocketid
+```
+
+### OAuth2 Settings in Remnawave
+
+After creating the OAuth2 application – copy the `Client ID` and `Client Secret`. Insert this data in the corresponding section. And below, enter the list of email addresses for which login will be allowed.
+
+In the `Plain Domain` field, enter the domain address where your PocketID is located.
+Just enter the domain name – without the path and `https://`, for example: `pocketid.your-domain.com`

_panel-docs/help-articles/zh/AUTH_METHODS_TELEGRAM.md

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+## Telegram OAuth2
+
+To configure the "Login via Telegram" feature, you need a Telegram bot. Additionally, you need to configure the bot for the feature to work correctly.
+
+### Bot Configuration
+
+1. Open @BotFather (https://t.me/botfather)
+
+2. Send the `/mybots` command and select the required bot
+
+3. Select the option `Bot settings` → `Domain`
+
+4. Select the option `Set domain`
+
+    Now send the bot a message containing the domain name used to access Remnawave.
+
+    ```
+    https://panel.domain.com
+    ```
+
+### Access Configuration
+
+After entering the bot token, you need to specify a list of administrator IDs who will have access to login.
+
+1. From the required account, launch the bot – https://t.me/Get_myidrobot
+2. In response, the bot will send you your ID, enter it in the corresponding field.
+
+---
+
+### Known Error Solutions
+
+###### Error: BOT_DOMAIN_INVALID
+
+This error occurs due to incorrect bot domain configuration – review the "Bot Configuration" section (above). If necessary, repeat this step-by-step process.
+
+###### Error: Telegram confirmation code not received during login
+
+Unfortunately, this issue cannot be resolved from the Remnawave side. Try using a bot that was created a while ago or use a different browser.
+Alternatively, you can try logging in on one of the "official" resources – for example, https://fragment.com. Since the Telegram session within the browser will be shared – you can try logging into the panel.

_panel-docs/help-articles/zh/AUTH_METHODS_YANDEX.md

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+## OAuth2: Yandex
+
+The Yandex authentication method is not recommended for use.
+
+### Creating an OAuth Application
+
+You need to create an OAuth application in Yandex.
+
+Follow the link to create an application: https://oauth.yandex.com/client/new
+
+On the second step of application creation, select the "Web application" option and enter the `Callback URL`
+
+```
+# Replace YOUR_PANEL_DOMAIN with your Remnawave panel address
+https://YOUR_PANEL_DOMAIN/oauth2/callback/yandex
+```
+
+Don't forget to replace `YOUR_PANEL_DOMAIN` with the correct panel address.
+
+On the third step of creation – make sure to check the box next to `Access to email address`, no other permissions are required.