feat(translate): 接入腾讯 MaaS u2 作为 TMT 备用翻译通道
新通道:腾讯 MaaS u2 模型(云知声),OpenAI 兼容协议 - 端点:https://maas-api.hivoice.cn/v1 - 模型:u2(翻译专用,实测 + 锁定 prompt 后译文质量稳定) - 备用链路:TMT 配额耗尽 / TMT 失败时自动降级到 MaaS 关键 prompt 工程(锁定): - 必须用 user 提供的固定中文 prompt,否则 u2 会把译文放进 reasoning_content 而 content 返乱码 - 限定只接 EN/JA → ZH - 中文输入固定返回拒绝文案 新增/改动: - backend/app/services/translation/tencent_maas.py: 新建 - backend/app/services/translation/service.py: 备用链 maas → local,初始化失败友好降级 - backend/app/config.py: 加 tencent_maas_* 4 个配置 - .env.example: 文档化
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@@ -82,6 +82,15 @@ class Settings(BaseSettings):
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local_translate_model: str = "nllb-200-distilled-600M"
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local_translate_device: str = "cpu"
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# ===== 腾讯 MaaS(OpenAI 兼容翻译备用通道)=====
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# 用法:腾讯云 MaaS 提供的翻译模型,通过 OpenAI 协议调用
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# 留空 api_key = 不启用该 provider
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tencent_maas_api_key: str = ""
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tencent_maas_base_url: str = "https://maas-api.hivoice.cn/v1"
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tencent_maas_model: str = "u2"
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# 每篇调用间隔(秒),与 LLM 客户端解耦
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tencent_maas_interval_sec: float = 1.0
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# ===== 抓取 =====
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fetch_global_qps: int = 4
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fetch_timeout: int = 20
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