Add Brazilian Portuguese localization

[mdnbras]

Summary

• Add Brazilian Portuguese as a persisted UI language with native display name and common aliases (pt, pt-BR, português, and variants).
• Register the pt-BR Fluent locale and translate 260 core strings covering settings, notifications, provider states, tray menus, the dashboard, and usage metrics.
• Keep untranslated strings safe through the existing en-US fallback behavior used by the other non-English locales.
• Extend the frontend bridge union, fallback language picker, and Intl locale mapping.
• Add tests for language discovery, alias resolution, bridge bundles, fallback completeness, and placeholder preservation.

Related issue

No linked issue.

Affected areas

• Tray panel
• Settings UI
• Config file / settings persistence
• CLI
• Provider-specific behavior
• Installer / release packaging
• Startup / background behavior
• Documentation
• Other: locale bridge and notification/tray strings

Validation

• powershell.exe -ExecutionPolicy Bypass -NoProfile -File scripts\local-check.ps1 — not run: Rust, Node, and pnpm toolchains are not installed or available in PATH on this host.
• For full pre-release validation: not applicable.
• For installer/release changes: not applicable.
• Thermo-nuclear code quality review completed before submitting.
• Other: git diff --check passed; static audit confirmed all Language mappings and catalog assertions were updated. Hosted CI is required for executable validation.

UI / tray proof

• Not applicable
• CUA Driver visual proof attached
• CUA Driver could not be used; the required fresh desktop build could not be produced because the Rust and frontend toolchains are unavailable on this host. No stale binary was used as proof.

Notes for reviewers

This is intentionally a draft until hosted CI validates the Rust/TypeScript changes. Like the existing translated locales, pt-BR is allowed to fall back to English for keys not yet translated. Reviewers should focus on Fluent placeholder preservation and Brazilian Portuguese terminology.

Summary by CodeRabbit

• New Features
  • Added Brazilian Portuguese as a language option, with translated app text and support for common Portuguese language labels.
  • Updated locale selection to use the pt-BR locale.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: d61e619a-e201-4a7c-a80b-2ffee71b66ac

📥 Commits

Reviewing files that changed from the base of the PR and between 5a6d3f2 and 4f0f082.

📒 Files selected for processing (1)

• rust/src/locale/pt-BR.ftl

🚧 Files skipped from review as they are similar to previous changes (1)

• rust/src/locale/pt-BR.ftl

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📝 Walkthrough

Walkthrough

This change adds Brazilian Portuguese as a supported language. It adds the language to Rust and desktop language definitions, maps it to the pt-BR locale, updates two translated strings, and adds test coverage.

Changes

Brazilian Portuguese locale

Layer / File(s)	Summary
Language definition and locale mapping rust/src/settings/types.rs, rust/src/locale.rs, rust/src/settings/tests.rs, apps/desktop-tauri/src-tauri/src/commands/locale_cmd.rs	Adds PortugueseBrazil, its display name, stable label, accepted aliases, and pt-BR locale mapping. Tests cover language availability, alias resolution, and locale command behavior.
Brazilian Portuguese translations rust/src/locale/pt-BR.ftl, rust/src/locale/tests.rs	Updates the StartAtLoginHelper and AllSystemsOperational translations. Tests cover locale selection, resource-key coverage, and formatting placeholders.
Desktop language integration apps/desktop-tauri/src/types/bridge.ts, apps/desktop-tauri/src/types/bridge.test.ts, apps/desktop-tauri/src/surfaces/settings/tabs/GeneralTab.tsx, apps/desktop-tauri/src/surfaces/settings/providers/sections/credentials/ClaudeSwapAccountsSection.tsx	Adds portuguesebrazil to the desktop language type and fallback options. Maps Brazilian Portuguese to pt-BR for account locale selection.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Feature

Merge Risk: ⚪ Minimal · up to 4f0f0

No specific issue in the Brazilian Portuguese integration is established here; complete the pending CI checks before merging.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: adding Brazilian Portuguese localization and language support.
Docstring Coverage	✅ Passed	Docstring coverage is 84.21% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 19 functions across 9 files. (1 skipped: 1 …
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create a new PR

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Actionable comments posted: 2

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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Inline comments:
In `@rust/src/locale/pt-BR.ftl`:
- Line 244: Update the AllSystemsOperational translation to state that all
systems are operational in Portuguese, rather than referring to operating
systems.
- Line 16: Update StartAtLoginHelper to describe CodexBar starting automatically
when the user signs in, rather than implying that the system signs the user in
automatically.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: c0ebff9c-5e5b-4ad3-b739-f85abbac5bf1

📥 Commits

Reviewing files that changed from the base of the PR and between b585d48 and 5a6d3f2.

📒 Files selected for processing (10)

• apps/desktop-tauri/src-tauri/src/commands/locale_cmd.rs
• apps/desktop-tauri/src/surfaces/settings/providers/sections/credentials/ClaudeSwapAccountsSection.tsx
• apps/desktop-tauri/src/surfaces/settings/tabs/GeneralTab.tsx
• apps/desktop-tauri/src/types/bridge.test.ts
• apps/desktop-tauri/src/types/bridge.ts
• rust/src/locale.rs
• rust/src/locale/pt-BR.ftl
• rust/src/locale/tests.rs
• rust/src/settings/tests.rs
• rust/src/settings/types.rs

Included review availability: Your plan provides up to 4 included reviews per hour; 3 remain after this review.