feat(i18n): add arabic localization (#142)

Co-authored-by: HBX <107771255+hbx12@users.noreply.github.com>

Author: grinev

.env.example

@@ -95,7 +95,7 @@ OPENCODE_MODEL_ID=big-pickle
 # BASH_TOOL_DISPLAY_MAX_LENGTH=128
 
 # Bot locale: supported locale code (default: en)
-# Supported locales: en, de, es, fr, ru, zh
+# Supported locales: en, ar, de, es, fr, ru, zh
 # BOT_LOCALE=en
 
 # Hide thinking indicator messages (default: false)

README.md

@@ -17,7 +17,7 @@ Scheduled tasks support. Turns the bot into a lightweight OpenClaw alternative f
 
 Platforms: macOS, Windows, Linux
 
-Languages: English (`en`), Deutsch (`de`), Español (`es`), Français (`fr`), Русский (`ru`), 简体中文 (`zh`)
+Languages: English (`en`), العربية (`ar`), Deutsch (`de`), Español (`es`), Français (`fr`), Русский (`ru`), 简体中文 (`zh`)
 
 <p align="center">
   <img src="assets/screencast.gif" width="45%" alt="OpenCode Telegram Bot screencast" />
@@ -190,7 +190,7 @@ For this to work, the console OpenCode instance must be started on the same port
 
 ### Localization
 
-- Supported locales: `en`, `de`, `es`, `fr`, `ru`, `zh`
+- Supported locales: `en`, `ar`, `de`, `es`, `fr`, `ru`, `zh`
 - The setup wizard asks for language first
 - You can change locale later with `BOT_LOCALE`
 
@@ -217,7 +217,7 @@ When installed via npm, the configuration wizard handles the initial setup. The
 | `OPENCODE_SERVER_PASSWORD`                 | Server auth password                                                                                                  |    No    | —                        |
 | `OPENCODE_MODEL_PROVIDER`                  | Default model provider                                                                                                |   Yes    | `opencode`               |
 | `OPENCODE_MODEL_ID`                        | Default model ID                                                                                                      |   Yes    | `big-pickle`             |
-| `BOT_LOCALE`                               | Bot UI language (supported locale code, e.g. `en`, `de`, `es`, `fr`, `ru`, `zh`)                                      |    No    | `en`                     |
+| `BOT_LOCALE`                               | Bot UI language (supported locale code, e.g. `en`, `ar`, `de`, `es`, `fr`, `ru`, `zh`)                                |    No    | `en`                     |
 | `SESSIONS_LIST_LIMIT`                      | Sessions per page in `/sessions`                                                                                      |    No    | `10`                     |
 | `MESSAGES_LIST_LIMIT`                      | User messages per page in `/messages`                                                                                 |    No    | `10`                     |
 | `PROJECTS_LIST_LIMIT`                      | Projects per page in `/projects`                                                                                      |    No    | `10`                     |