feat: add CAMB AI integration (translation, TTS, voice cloning)

[neilruaro-camb]

Summary

• Add CAMB AI as a third-party provider
• Three new workflow nodes: Translation, Voice Clone, Translated TTS
• TTS streaming support for direct audio generation
• 140+ language support via CAMB language codes
• Comprehensive test suite (24 tests, unit + integration)

New Workflow Nodes

1. CAMB Translation — Translate text between 140+ languages
2. CAMB Voice Clone — Create custom voices from reference audio
3. CAMB Translated TTS — Translate text and synthesize speech in one step

Files Changed

Modified (7)

• packages/global/core/workflow/constants.ts — CAMB input/output key enums
• packages/global/core/workflow/node/constant.ts — CAMB FlowNodeTypeEnum entries
• packages/global/core/workflow/template/constants.ts — Register CAMB node templates
• packages/service/core/workflow/dispatch/constants.ts — Register CAMB dispatch handlers
• packages/web/i18n/en/workflow.json — English i18n
• packages/web/i18n/zh-CN/workflow.json — Chinese Simplified i18n
• packages/web/i18n/zh-Hant/workflow.json — Chinese Traditional i18n

New (10)

• packages/global/core/workflow/template/system/cambTranslation.ts
• packages/global/core/workflow/template/system/cambVoiceClone.ts
• packages/global/core/workflow/template/system/cambTranslatedTTS.ts
• packages/service/core/workflow/dispatch/tools/cambTranslation.ts
• packages/service/core/workflow/dispatch/tools/cambVoiceClone.ts
• packages/service/core/workflow/dispatch/tools/cambTranslatedTTS.ts
• packages/service/thirdProvider/cambAi/index.ts
• packages/service/thirdProvider/cambAi/types.ts
• packages/service/thirdProvider/cambAi/languages.ts
• test/cases/service/thirdProvider/cambAi.test.ts

Configuration

Set CAMB_API_KEY environment variable. Get an API key at https://camb.ai

Test Plan

• 24 unit/integration tests pass (npx vitest run test/cases/service/thirdProvider/cambAi.test.ts)
• Integration tests skip gracefully without CAMB_API_KEY
• Lint passes (pnpm lint)
• TypeScript compilation passes
• Pre-commit hooks pass (format + lint)

[cla-assistant]

All committers have signed the CLA.

[github-actions]

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