feat(llm): 新增 StepFun 供应商预设；修复 Codex OAuth 默认模型不可用 (#836)
StepFun 预设： - 供应商下拉新增 StepFun（阶跃星辰），预填 https://api.stepfun.com/v1， 默认模型 step-1o-turbo-vision（无思考，流式首字 ~0.3s；step-3.x-flash 系列为推理模型且思考无法关闭，正式内容需等隐藏思考结束，不适合听写润色） - thinking 控制表新增 stepfun → reasoning_effort（开=medium / 关=low）， base_url 兜底识别同步支持"自定义"preset 接入 StepFun 的场景 - 补默认 endpoint 映射与两个单元测试 Codex OAuth 默认模型： - gpt-5.3-codex-spark 对 ChatGPT 账号会被后端 400 拒绝 （"model is not supported when using Codex with a ChatGPT account"）， 导致每次润色静默失败回退原文；默认与占位改为实测可用的 gpt-5.5 Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
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@@ -92,6 +92,7 @@ fn llm_provider_default_endpoint(provider: &str) -> Option<&'static str> {
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"openrouterFree" => Some("https://openrouter.ai/api/v1"),
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"alibabaCoding" => Some("https://coding-intl.dashscope.aliyuncs.com/v1"),
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"codingPlanX" => Some("https://api.codingplanx.ai/v1"),
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"stepfun" => Some("https://api.stepfun.com/v1"),
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_ => None,
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}
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}
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@@ -25,7 +25,10 @@ const DEFAULT_REQUEST_TIMEOUT_SECS: u64 = 30;
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const BODY_PREVIEW_LIMIT: usize = 200;
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pub const CODEX_OAUTH_PROVIDER_ID: &str = "codex_oauth";
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pub const CODEX_DEFAULT_BASE_URL: &str = "https://chatgpt.com/backend-api";
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pub const CODEX_DEFAULT_MODEL: &str = "gpt-5.3-codex-spark";
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// 注意：gpt-5.3-codex-spark 不能做默认——ChatGPT 账号走 Codex OAuth 时后端会
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// 400 拒绝（"model is not supported when using Codex with a ChatGPT account"），
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// 每次润色都失败并回退原文。gpt-5.5 是该通道实测可用的模型。
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pub const CODEX_DEFAULT_MODEL: &str = "gpt-5.5";
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const CODEX_MIN_TOKEN_TTL_SECS: u64 = 60;
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#[derive(Clone, Debug)]
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@@ -1607,7 +1610,9 @@ fn openai_compatible_thinking_control(provider_id: &str) -> Option<ThinkingContr
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"minimax" => Some(ThinkingControl::MiniMaxThinking),
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"openrouterFree" => Some(ThinkingControl::OpenRouterReasoning),
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"alibabaCoding" => Some(ThinkingControl::EnableThinking),
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"openai" | "codingPlanX" => Some(ThinkingControl::ReasoningEffort),
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// StepFun step-3.x-flash 系列按官方文档接受 reasoning_effort（low/medium/high，
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// 无法完全关闭思考）；非推理模型（如 step-1o-turbo-vision）会忽略该字段。
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"openai" | "codingPlanX" | "stepfun" => Some(ThinkingControl::ReasoningEffort),
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// custom / 其他未声明 provider 走 base_url 兜底识别——用户用自定义
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// endpoint 接入 MiniMax 时,根据 base_url 命中即下发官方 thinking 参数。
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_ => None,
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@@ -1643,6 +1648,9 @@ fn openai_compatible_thinking_control_for_base_url(base_url: &str) -> Option<Thi
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if host.contains("dashscope") || host.contains("aliyuncs") {
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return Some(ThinkingControl::EnableThinking);
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}
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if host.contains("stepfun") {
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return Some(ThinkingControl::ReasoningEffort);
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}
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None
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}
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@@ -2650,6 +2658,47 @@ mod tests {
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}
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}
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#[test]
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fn openai_chat_body_adds_reasoning_effort_for_stepfun_channel() {
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// StepFun 按渠道声明下发 reasoning_effort:开启思考发 medium,关闭发 low。
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for (thinking_enabled, expected) in [(true, "medium"), (false, "low")] {
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let provider = OpenAICompatibleLLMProvider::new(
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OpenAICompatibleConfig::new(
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"stepfun",
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"StepFun",
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"https://api.stepfun.com/v1",
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"k",
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"step-3.7-flash",
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)
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.with_thinking_enabled(thinking_enabled),
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);
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let body = provider.chat_body(false, vec![json!({ "role": "user", "content": "hi" })]);
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assert_eq!(body["reasoning_effort"], expected);
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}
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}
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#[test]
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fn openai_chat_body_falls_back_to_base_url_for_custom_stepfun_endpoint() {
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// 用 "custom" preset + StepFun base_url 接入时,base_url 兜底识别需要
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// 命中 "stepfun" 关键字,下发 reasoning_effort。
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let provider = OpenAICompatibleLLMProvider::new(
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OpenAICompatibleConfig::new(
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"custom",
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"Custom",
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"https://api.stepfun.com/v1",
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"k",
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"step-3.7-flash",
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)
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.with_thinking_enabled(false),
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);
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let body = provider.chat_body(false, vec![json!({ "role": "user", "content": "hi" })]);
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assert_eq!(body["reasoning_effort"], "low");
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}
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#[test]
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fn openai_chat_body_omits_thinking_control_for_unknown_provider() {
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let provider = OpenAICompatibleLLMProvider::new(
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@@ -782,6 +782,7 @@ export const en: typeof zhCN = {
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alibabaCoding: 'Alibaba Cloud Coding Plan',
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codingPlanX: 'CodingPlanX',
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minimax: 'MiniMax (M3)',
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stepfun: 'StepFun',
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custom: 'Custom',
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asrVolcengine: 'Volcengine bigasr',
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asrBailian: 'Alibaba Bailian realtime ASR',
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@@ -784,6 +784,7 @@ export const ja: typeof zhCN = {
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alibabaCoding: 'Alibaba Cloud Coding Plan',
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codingPlanX: 'CodingPlanX',
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minimax: 'MiniMax（M3）',
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stepfun: 'StepFun（階躍星辰）',
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custom: 'カスタム',
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asrVolcengine: 'Volcengine bigasr',
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asrBailian: 'Alibaba Bailian リアルタイム ASR',
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@@ -784,6 +784,7 @@ export const ko: typeof zhCN = {
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alibabaCoding: 'Alibaba Cloud Coding Plan',
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codingPlanX: 'CodingPlanX',
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minimax: 'MiniMax (M3)',
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stepfun: 'StepFun',
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custom: '사용자 정의',
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asrVolcengine: 'Volcengine bigasr',
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asrBailian: 'Alibaba Bailian 실시간 ASR',
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@@ -780,6 +780,7 @@ export const zhCN = {
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alibabaCoding: '阿里云 Coding Plan',
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codingPlanX: 'CodingPlanX',
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minimax: 'MiniMax（M3）',
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stepfun: 'StepFun（阶跃星辰）',
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custom: '自定义',
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asrVolcengine: '火山引擎 bigasr',
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asrBailian: '阿里云百炼实时 ASR',
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@@ -782,6 +782,7 @@ export const zhTW: typeof zhCN = {
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alibabaCoding: '阿里雲 Coding Plan',
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codingPlanX: 'CodingPlanX',
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minimax: 'MiniMax（M3）',
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stepfun: 'StepFun（階躍星辰）',
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custom: '自定義',
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asrVolcengine: '火山引擎 bigasr',
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asrBailian: '阿里雲百煉即時 ASR',
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@@ -88,7 +88,9 @@ const LLM_PRESETS = [
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id: 'codex_oauth',
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nameKey: 'codexOAuth',
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baseUrl: '',
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modelPlaceholder: 'gpt-5.3-codex-spark',
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// gpt-5.3-codex-spark 对 ChatGPT 账号的 Codex 通道会被 400 拒绝，
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// 默认与占位一律用实测可用的 gpt-5.5（见 polish.rs::CODEX_DEFAULT_MODEL）。
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modelPlaceholder: 'gpt-5.5',
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},
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{
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id: 'mimo',
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@@ -132,6 +134,19 @@ const LLM_PRESETS = [
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baseUrl: 'https://api.minimaxi.com/v1',
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modelPlaceholder: 'MiniMax-M3',
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},
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{
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// StepFun（阶跃星辰）OpenAI 兼容 /v1/chat/completions。
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// 默认模型选 step-1o-turbo-vision：step-3.x-flash 系列是推理模型且思考无法关闭
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// （reasoning_effort 只能调档，正式内容要等隐藏思考结束，润色场景 TTFT 2s+），
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// 而 step-1o-turbo-vision 无思考、TTFT ~0.3s，润色忠实度实测更适合听写链路。
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// provider_id 在后端 polish.rs::openai_compatible_thinking_control 命中
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// "stepfun" → ReasoningEffort 分支；走"自定义"preset 接入时由 base_url
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// 含 "stepfun" 兜底识别，见 polish.rs。
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id: 'stepfun',
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nameKey: 'stepfun',
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baseUrl: 'https://api.stepfun.com/v1',
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modelPlaceholder: 'step-1o-turbo-vision',
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},
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{
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id: 'custom',
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nameKey: 'custom',
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