feat: add OpenAI Responses API format conversion (api_format = "openai_responses")

Support Anthropic ↔ OpenAI Responses API format conversion alongside existing
Chat Completions conversion. The Responses API uses a flat input/output structure
with lifted function_call/function_call_output items and named SSE lifecycle events.

src/components/providers/forms/ClaudeFormFields.tsx

@@ -164,9 +164,11 @@ export function ClaudeFormFields({
           onChange={onBaseUrlChange}
           placeholder={t("providerForm.apiEndpointPlaceholder")}
           hint={
-            apiFormat === "openai_chat"
-              ? t("providerForm.apiHintOAI")
-              : t("providerForm.apiHint")
+            apiFormat === "openai_responses"
+              ? t("providerForm.apiHintResponses")
+              : apiFormat === "openai_chat"
+                ? t("providerForm.apiHintOAI")
+                : t("providerForm.apiHint")
           }
           onManageClick={() => onEndpointModalToggle(true)}
         />
@@ -209,6 +211,11 @@ export function ClaudeFormFields({
                   defaultValue: "OpenAI Chat Completions (需转换)",
                 })}
               </SelectItem>
+              <SelectItem value="openai_responses">
+                {t("providerForm.apiFormatOpenAIResponses", {
+                  defaultValue: "OpenAI Responses API (需转换)",
+                })}
+              </SelectItem>
             </SelectContent>
           </Select>
           <p className="text-xs text-muted-foreground">

src/config/claudeProviderPresets.ts

@@ -47,7 +47,8 @@ export interface ProviderPreset {
   // Claude API 格式（仅 Claude 供应商使用）
   // - "anthropic" (默认): Anthropic Messages API 格式，直接透传
   // - "openai_chat": OpenAI Chat Completions 格式，需要格式转换
-  apiFormat?: "anthropic" | "openai_chat";
+  // - "openai_responses": OpenAI Responses API 格式，需要格式转换
+  apiFormat?: "anthropic" | "openai_chat" | "openai_responses";
 }
 
 export const providerPresets: ProviderPreset[] = [

src/hooks/useProviderActions.ts

@@ -152,7 +152,8 @@ export function useProviderActions(activeApp: AppId) {
         if (
           activeApp === "claude" &&
           provider.category !== "official" &&
-          provider.meta?.apiFormat === "openai_chat"
+          (provider.meta?.apiFormat === "openai_chat" ||
+            provider.meta?.apiFormat === "openai_responses")
         ) {
           // OpenAI Chat 格式供应商：显示代理提示
           toast.info(

src/i18n/locales/en.json

@@ -697,6 +697,8 @@
     "apiFormatHint": "Select the input format for the provider's API",
     "apiFormatAnthropic": "Anthropic Messages (Native)",
     "apiFormatOpenAIChat": "OpenAI Chat Completions (Requires proxy)",
+    "apiFormatOpenAIResponses": "OpenAI Responses API (Requires proxy)",
+    "apiHintResponses": "💡 Fill in OpenAI Responses API compatible service endpoint, avoid trailing slash",
     "anthropicDefaultHaikuModel": "Default Haiku Model",
     "anthropicDefaultSonnetModel": "Default Sonnet Model",
     "anthropicDefaultOpusModel": "Default Opus Model",

src/i18n/locales/ja.json

@@ -697,6 +697,8 @@
     "apiFormatHint": "プロバイダー API の入力フォーマットを選択",
     "apiFormatAnthropic": "Anthropic Messages（ネイティブ）",
     "apiFormatOpenAIChat": "OpenAI Chat Completions（プロキシが必要）",
+    "apiFormatOpenAIResponses": "OpenAI Responses API（プロキシが必要）",
+    "apiHintResponses": "💡 OpenAI Responses API 互換サービスのエンドポイントを入力してください。末尾にスラッシュを付けないでください",
     "anthropicDefaultHaikuModel": "既定 Haiku モデル",
     "anthropicDefaultSonnetModel": "既定 Sonnet モデル",
     "anthropicDefaultOpusModel": "既定 Opus モデル",

src/i18n/locales/zh.json

@@ -697,6 +697,8 @@
     "apiFormatHint": "选择供应商 API 的输入格式",
     "apiFormatAnthropic": "Anthropic Messages (原生)",
     "apiFormatOpenAIChat": "OpenAI Chat Completions (需开启代理)",
+    "apiFormatOpenAIResponses": "OpenAI Responses API (需开启代理)",
+    "apiHintResponses": "💡 填写兼容 OpenAI Responses API 的服务端点地址，不要以斜杠结尾",
     "anthropicDefaultHaikuModel": "Haiku 默认模型",
     "anthropicDefaultSonnetModel": "Sonnet 默认模型",
     "anthropicDefaultOpusModel": "Opus 默认模型",

src/types.ts

@@ -145,7 +145,8 @@ export interface ProviderMeta {
   // Claude API 格式（仅 Claude 供应商使用）
   // - "anthropic": 原生 Anthropic Messages API 格式，直接透传
   // - "openai_chat": OpenAI Chat Completions 格式，需要格式转换
-  apiFormat?: "anthropic" | "openai_chat";
+  // - "openai_responses": OpenAI Responses API 格式，需要格式转换
+  apiFormat?: "anthropic" | "openai_chat" | "openai_responses";
 }
 
 // Skill 同步方式
@@ -154,7 +155,8 @@ export type SkillSyncMethod = "auto" | "symlink" | "copy";
 // Claude API 格式类型
 // - "anthropic": 原生 Anthropic Messages API 格式，直接透传
 // - "openai_chat": OpenAI Chat Completions 格式，需要格式转换
-export type ClaudeApiFormat = "anthropic" | "openai_chat";
+// - "openai_responses": OpenAI Responses API 格式，需要格式转换
+export type ClaudeApiFormat = "anthropic" | "openai_chat" | "openai_responses";
 
 // 主页面显示的应用配置
 export interface VisibleApps {