docs: update changelog and READMEs for v1.4.9 release

- CHANGELOG.md: add v1.4.9 entry (i18n, codex fix, build fixes)
- README.md: add internationalization to Key Features
- README.pt-BR.md: add internacionalização to Funcionalidades

CHANGELOG.md

@@ -7,6 +7,31 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ---
 
+## [1.4.9] — 2026-02-25
+
+> ### 🌐 Full Internationalization (i18n) + Multi-Account Fix
+>
+> Complete dashboard i18n migration with next-intl, supporting English and Portuguese (Brazil). Fixes production build issues and enables multiple Codex accounts from the same workspace.
+
+### ✨ New Features
+
+- **Full Dashboard Internationalization** — Complete i18n migration of 21+ pages and components using `next-intl`. Every dashboard string is now translatable with full EN and PT-BR support. Includes language selector (globe icon) in the header for real-time language switching
+- **Portuguese (Brazil) Translation** — Complete `pt-BR.json` translation file with 500+ keys covering all pages: Home, Providers, Settings, Combos, Analytics, Costs, Logs, Health, CLI Tools, Endpoint, API Manager, and Onboarding
+- **Language Selector Component** — New `LanguageSelector` component in the header with flag icons and dropdown for switching between 🇺🇸 English and 🇧🇷 Português
+
+### 🐛 Bug Fixes
+
+- **Multiple Codex Accounts from Same Workspace** — Fixed deduplication logic in `createProviderConnection` that prevented adding multiple OpenAI Pro Business accounts from the same Team workspace. Now uses compound check (workspaceId + email) instead of workspaceId-only, allowing separate connections per user
+- **Production Build — Crypto Import** — Fixed `instrumentation.ts` using `eval('require')('crypto')` to bypass webpack's static analysis that blocked the Node.js crypto module in the bundled instrumentation file
+- **Production Build — Translation Scope** — Fixed sub-components `ProviderOverviewCard` and `ProviderModelsModal` in `HomePageClient.tsx` that referenced parent-scope translation hooks. Each sub-component now has its own `useTranslations()` call
+- **Production Build — app/ Directory Conflict** — Resolved Next.js 16 confusing the production `app/` directory (server build output) with the `src/app/` app router directory, which caused "missing root layout" build failures
+
+### 📄 i18n Pages Migrated
+
+Home, Endpoint, API Manager, Providers (list + detail + new), Combos, Logs, Costs, Analytics, Health, CLI Tools, Settings (General, Security, Routing, Session, IP Filter, Compliance, Fallback Chains, Thinking Budget, Policies, Pricing, Resilience, Advanced), Onboarding Wizard, Audit Log, Usage
+
+---
+
 ## [1.4.7] — 2026-02-25
 
 > ### 🐛 Bugfix — Antigravity Model Prefix & Version Sync

README.md

@@ -395,14 +395,15 @@ Access via: WhatsApp, Telegram, Slack, Discord, iMessage, Signal...
 
 ### ☁️ Deployment & Sync
 
-| Feature                    | What It Does                                                          |
-| -------------------------- | --------------------------------------------------------------------- |
-| 💾 **Cloud Sync**          | Sync config across devices via Cloudflare Workers                     |
-| 🌐 **Deploy Anywhere**     | Localhost, VPS, Docker, Cloudflare Workers                            |
-| 🔑 **API Key Management**  | Generate, rotate, and scope API keys per provider                     |
-| 🧙 **Onboarding Wizard**   | 4-step guided setup for first-time users                              |
-| 🔧 **CLI Tools Dashboard** | One-click configure Claude, Codex, Cline, OpenClaw, Kilo, Antigravity |
-| 🔄 **DB Backups**          | Automatic backup, restore, export & import for all settings           |
+| Feature                     | What It Does                                                          |
+| --------------------------- | --------------------------------------------------------------------- |
+| 💾 **Cloud Sync**           | Sync config across devices via Cloudflare Workers                     |
+| 🌐 **Deploy Anywhere**      | Localhost, VPS, Docker, Cloudflare Workers                            |
+| 🔑 **API Key Management**   | Generate, rotate, and scope API keys per provider                     |
+| 🧙 **Onboarding Wizard**    | 4-step guided setup for first-time users                              |
+| 🔧 **CLI Tools Dashboard**  | One-click configure Claude, Codex, Cline, OpenClaw, Kilo, Antigravity |
+| 🔄 **DB Backups**           | Automatic backup, restore, export & import for all settings           |
+| 🌐 **Internationalization** | Full i18n with next-intl — English + Portuguese (Brazil) support      |
 
 <details>
 <summary><b>📖 Feature Details</b></summary>

README.pt-BR.md

@@ -399,6 +399,7 @@ Acesso via: WhatsApp, Telegram, Slack, Discord, iMessage, Signal...
 | 🧙 **Assistente de Configuração** | Setup guiado em 4 etapas para novos usuários                                      |
 | 🔧 **Dashboard CLI Tools**        | Configuração em um clique para Claude, Codex, Cline, OpenClaw, Kilo, Antigravity  |
 | 🔄 **Backups de DB**              | Backup, restauração, exportação e importação automática de todas as configurações |
+| 🌐 **Internacionalização**        | i18n completo com next-intl — suporte English + Português (Brasil)                |
 
 <details>
 <summary><b>📖 Detalhes das Funcionalidades</b></summary>