feat(openai): completion::stream, response::stream and basic model

src: gitea.starryskymeow.cn/xkm/translate

model.go

@@ -0,0 +1,45 @@
+package llm_api
+
+type OpenaiChatMessage struct {
+	Role    string `json:"role"`
+	Content string `json:"content"`
+}
+
+type OpenaiChatCompletionReq struct {
+	Model           string              `json:"model"`
+	Messages        []OpenaiChatMessage `json:"messages"`
+	Temperature     *float64            `json:"temperature,omitempty"`
+	ReasoningEffort string              `json:"reasoning_effort,omitempty"`
+	Stream          bool                `json:"stream"`
+}
+
+type OpenaiResponseReasoning struct {
+	Effort  string `json:"effort"`
+	Summary string `json:"summary,omitempty"` // auto, concise, detailed
+}
+
+type OpenaiChatResponseReq struct {
+	Model       string                  `json:"model"`
+	Input       []OpenaiChatMessage     `json:"input"`
+	Temperature *float64                `json:"temperature,omitempty"`
+	Reasoning   OpenaiResponseReasoning `json:"reasoning,omitempty"`
+	Stream      bool                    `json:"stream"`
+}
+
+type OpenaiResponseStreamEvent struct {
+	Type  string `json:"type"`
+	Delta string `json:"delta"`
+}
+
+type OpenaiCompletionStreamEvent struct {
+	Choices []struct {
+		Delta struct {
+			Content string `json:"content"`
+		} `json:"delta"`
+	} `json:"choices"`
+
+	Error *struct {
+		Message string `json:"message"`
+		Type    string `json:"type"`
+	} `json:"error,omitempty"`
+}