feat(pt-BR): add Brazilian Portuguese localization

DEVELOPMENT.md

@@ -894,7 +894,7 @@ Direct `dotnet build` without the script will fail with "WindowsAppSDKSelfContai
 |----------|---------|
 | `OPENCLAW_FORCE_ONBOARDING=1` | Show onboarding wizard even if a token already exists |
 | `OPENCLAW_SKIP_UPDATE_CHECK=1` | Skip the update dialog (useful during testing) |
-| `OPENCLAW_LANGUAGE=fr-fr` | Override UI language (validated: en-us, fr-fr, nl-nl, zh-cn, zh-tw) |
+| `OPENCLAW_LANGUAGE=fr-fr` | Override UI language (validated: en-us, fr-fr, nl-nl, pt-br, zh-cn, zh-tw) |
 | `OPENCLAW_GATEWAY_PORT=19001` | Override default gateway port for local dev |
 | `OPENCLAW_VISUAL_TEST=1` | Enable automatic screenshot capture on page transitions |
 | `OPENCLAW_VISUAL_TEST_DIR=path` | Output directory for visual test screenshots |

docs/LOCALIZATION.md

@@ -9,6 +9,7 @@ OpenClaw Tray uses WinUI `.resw` resource files for localization. Windows automa
 | English (US) | `en-us` | `Strings/en-us/Resources.resw` |
 | French (France) | `fr-fr` | `Strings/fr-fr/Resources.resw` |
 | Dutch (Netherlands) | `nl-nl` | `Strings/nl-nl/Resources.resw` |
+| Brazilian Portuguese | `pt-br` | `Strings/pt-br/Resources.resw` |
 | Chinese (Simplified) | `zh-cn` | `Strings/zh-cn/Resources.resw` |
 | Chinese (Traditional) | `zh-tw` | `Strings/zh-tw/Resources.resw` |
 
@@ -71,7 +72,7 @@ Windows picks the language automatically based on the user's OS display language
 Set the `OPENCLAW_LANGUAGE` environment variable before launching the app:
 
 ```powershell
-$env:OPENCLAW_LANGUAGE = "fr-fr"  # or nl-nl, zh-cn, zh-tw
+$env:OPENCLAW_LANGUAGE = "fr-fr"  # or nl-nl, pt-br, zh-cn, zh-tw
 .\run-app-local.ps1 -NoBuild
 ```
 

src/OpenClaw.Tray.WinUI/App.xaml.cs

@@ -291,7 +291,7 @@ public App()
         if (!string.IsNullOrEmpty(langOverride))
         {
             // SECURITY: Whitelist known locale codes to prevent locale injection
-            string[] allowedLocales = ["en-us", "fr-fr", "nl-nl", "zh-cn", "zh-tw"];
+            string[] allowedLocales = ["en-us", "fr-fr", "nl-nl", "zh-cn", "zh-tw", "pt-br"];
             if (allowedLocales.Contains(langOverride.ToLowerInvariant()))
                 LocalizationHelper.SetLanguageOverride(langOverride);
             else